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Document and Entity Information - USD ($)	12 Months Ended
Document and Entity Information - USD ($)	Dec. 31, 2011	Feb. 17, 2012	Jun. 30, 2011
Document and Entity Information [Abstract]
Entity Registrant Name	MKS INSTRUMENTS INC
Entity Central Index Key	0001049502
Document Type	10-K
Document Period End Date	Dec. 31, 2011
Amendment Flag	false
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 1,385,444,483
Entity Common Stock, Shares Outstanding		52,510,320

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 312,916	$ 162,476
Short-term investments	252,603	269,457
Trade accounts receivable, net of allowances of $2,516 and $2,557 at December 31, 2011 and 2010, respectively	120,894	138,181
Inventories	153,632	156,429
Deferred income taxes	10,618	13,775
Other current assets	34,238	12,577
Total current assets	884,901	752,895
Property, plant and equipment, net	72,487	68,976
Long-term investments, Estimated Fair Value	7,873	0
Goodwill	140,084	140,020
Intangible assets, net	1,043	1,743
Other assets	12,266	18,779
Total assets	1,118,654	982,413
Current liabilities:
Short-term borrowings	1,932	0
Accounts payable	24,853	36,427
Accrued compensation	21,774	29,944
Income taxes payable	7,548	5,347
Other current liabilities	40,324	37,968
Total current liabilities	96,431	109,686
Other liabilities	32,211	25,688
Commitments and contingencies (Note 23)
Stockholders' equity:
Preferred Stock, $0.01 par value, 2,000,000 shares authorized; none issued and outstanding
Common Stock, no par value, 200,000,000 shares authorized; 52,491,948 and 50,648,601 shares issued and outstanding at December 31, 2011 and 2010, respectively	113	113
Additional paid-in capital	707,419	663,792
Retained earnings	268,870	171,356
Accumulated other comprehensive income	13,610	11,778
Total stockholders' equity	990,012	847,039
Total liabilities and stockholders' equity	$ 1,118,654	$ 982,413

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Consolidated Balance Sheets [Abstract]
Allowances for trade accounts receivable	$ 2,516	$ 2,557
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, shares authorized	2,000,000	2,000,000
Preferred Stock, shares issued
Preferred Stock, shares outstanding
Common Stock, par value
Common Stock, shares authorized	200,000,000	200,000,000
Common Stock, shares issued	52,491,948	50,648,601
Common Stock, shares outstanding	52,491,948	50,648,601

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net Revenues
Products	$ 719,002	$ 763,452	$ 324,951
Services	103,515	89,662	67,742
Total net revenues	822,517	853,114	392,693
Cost of revenues
Cost of products	387,445	421,777	219,776
Cost of service	60,084	52,699	42,701
Total cost of revenues	447,529	474,476	262,477
Gross profit	374,988	378,638	130,216
Research and development	61,033	62,689	50,212
Selling, general and administrative	128,015	119,841	100,429
Amortization of acquired intangible assets	1,015	1,283	2,762
Goodwill and asset impairment charges	0	0	142,958
Gain on sale of asset	0	(682)	0
Restructuring	0	0	5,516
Income (loss) from operations	184,925	195,507	(171,661)
Interest income	1,159	1,052	1,703
Interest expense	32	135	62
Income (loss) from continuing operations before income taxes	186,052	196,424	(170,020)
Provision (benefit) for income taxes	56,321	63,505	(20,659)
Income (loss) from continuing operations	129,731	132,919	(149,361)
Income (loss) from discontinued operations, net of taxes	0	9,668	(63,298)
Net income (loss)	$ 129,731	$ 142,587	$ (212,659)
Basic income (loss) per share:
Continuing operations	$ 2.49	$ 2.66	$ (3.03)
Discontinued operations	0.00	0.19	(1.28)
Net income (loss)	2.49	2.85	(4.31)
Diluted income (loss) per share:
Continuing operations	2.45	2.61	(3.03)
Discontinued operations	0.00	0.19	(1.28)
Net income (loss)	2.45	2.80	(4.31)
Cash dividends paid per common share:	$ 0.60	$ 0.00	$ 0.00
Weighted average common shares outstanding:
Basic	52,169	50,077	49,318
Diluted	52,847	50,927	49,318

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (loss)	Comprehensive Income (loss)
Beginning Balance at Dec. 31, 2008	$ 886,698	$ 113	$ 637,938	$ 241,428	$ 7,219	$ 0
Beginning Balance, Shares at Dec. 31, 2008		49,275,975
Net issuance under stock-based plans	(114)		(114)
Net issuance under stock-based plans, Shares		238,966
Stock-based compensation	8,845		8,845
Tax expense (benefit) from stock-based plans	(1,258)		(1,258)
Comprehensive income (loss) (net of tax):
Net Income (loss)	(212,659)			(212,659)		(212,659)
Other comprehensive income (loss):
Changes in value of financial instruments designated as cash flow hedges	267				267	267
Changes in unrealized gain on investments	92				92	92
Foreign currency translation adjustment	3,062				3,062	3,062
Comprehensive income (loss)						(209,238)
Ending Balance at Dec. 31, 2009	684,933	$ 113	645,411	28,769	10,640	0
Ending Balance, Shares at Dec. 31, 2009		49,514,941
Net issuance under stock-based plans	6,524		6,524
Net issuance under stock-based plans, Shares		1,133,660
Stock-based compensation	10,604		10,604
Tax expense (benefit) from stock-based plans	1,253		1,253
Comprehensive income (loss) (net of tax):
Net Income (loss)	142,587			142,587		142,587
Other comprehensive income (loss):
Changes in value of financial instruments designated as cash flow hedges	(2,600)				(2,600)	(2,600)
Changes in unrealized gain on investments	28				28	28
Foreign currency translation adjustment	3,710				3,710	3,710
Comprehensive income (loss)						143,725
Ending Balance at Dec. 31, 2010	847,039	$ 113	663,792	171,356	11,778	0
Ending Balance, Shares at Dec. 31, 2010		50,648,601
Net issuance under stock-based plans	28,546
Net issuance under stock-based plans, Shares		1,929,135
Stock-based compensation	11,225
Tax expense (benefit) from stock-based plans	5,019
Stock repurchase	$ (2,007)		(1,163)	(844)
Stock repurchase, Shares	86,000	(85,788)
Cash dividend	$ (31,373)			(31,373)
Comprehensive income (loss) (net of tax):
Net Income (loss)	129,731			129,731		129,731
Other comprehensive income (loss):
Changes in value of financial instruments designated as cash flow hedges	1,570
Changes in unrealized gain on investments	133				133	133
Foreign currency translation adjustment	129				129	129
Comprehensive income (loss)	131,563
Ending Balance at Dec. 31, 2011	$ 990,012	$ 113	$ 707,419	$ 268,870	$ 13,610	$ 0
Ending Balance, Shares at Dec. 31, 2011		52,491,948

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities:
Net income (loss)	$ 129,731	$ 142,587	$ (212,659)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	12,980	13,823	18,759
Stock-based compensation	11,225	10,604	8,845
Provision for excess and obsolete inventory	14,857	13,230	20,335
Impairment of goodwill	0	0	193,255
Impairment of intangibles and other long-lived assets	0	0	15,242
Gain on disposal of discontinued operations	0	(4,432)	0
Deferred income taxes	7,549	10,097	(3,143)
Excess tax benefits from stock-based compensation	(5,338)	(2,112)	(40)
Other	567	(560)	1,003
Changes in operating assets and liabilities:
Trade accounts receivable	17,923	(42,540)	(9,935)
Inventories	(11,697)	(52,467)	(4,677)
Income taxes	(5,345)	22,796	(19,939)
Other current assets	(7,674)	296	2,511
Accrued compensation and other liabilities	2,904	40,928	(10,757)
Accounts payable	(11,646)	11,220	6,103
Net cash provided by operating activities	156,036	163,470	4,903
Cash flows from investing activities:
Purchases of investments	(475,777)	(410,551)	(254,057)
Maturities and sales of investments	485,707	306,498	248,147
Purchases of property, plant and equipment	(15,567)	(15,819)	(4,179)
Proceeds from sale of assets	7	2,318	128
Net proceeds from sale of discontinued operations	0	15,582	0
Other	(448)	(3,651)	333
Net cash used in investing activities	(6,078)	(105,623)	(9,628)
Cash flows from financing activities:
Proceeds from short-term borrowings	41,802	119,209	162,361
Payments on short-term borrowings	(39,915)	(132,872)	(166,847)
Repurchases of common stock	(2,007)	0	0
Net proceeds (payments) related to employee stock awards	28,546	6,524	(114)
Dividend payments to common stockholders	(31,373)	0	0
Excess tax benefits from stock-based compensation	5,338	2,112	40
Other	0	0	(996)
Net cash provided by (used in) financing activities	2,391	(5,027)	(5,556)
Effect of exchange rate changes on cash and cash equivalents	(1,909)	(1,353)	2,029
Increase (decrease) in cash and cash equivalents	150,440	51,467	(8,252)
Cash and cash equivalents at beginning of year	162,476	111,009	119,261
Cash and cash equivalents at end of year	312,916	162,476	111,009
Cash paid during the period for:
Interest	144	78	187
Income taxes	$ 52,561	$ 47,446	$ 10,038

Business Description

12 Months Ended

Dec. 31, 2011

Business Description [Abstract]

Business Description

1)	Business Description

MKS Instruments, Inc. (“MKS” or the “Company”) was founded in 1961 and is a global provider of instruments, subsystems and process control solutions that measure, control, power, monitor and analyze critical parameters of advanced manufacturing processes to improve process performance and productivity of advanced manufacturing processes. MKS is managed as one operating segment and we group our products into three product groups based upon the similarity of the product function, type of product and manufacturing processes. These three groups of products are: Instruments and Control Systems, Power and Reactive Gas Products and Vacuum Products. MKS’ products are derived from its core competencies in pressure measurement and control, materials delivery, gas composition analysis, control and information technology, power and reactive gas generation and vacuum technology.

Basis of Presentation

12 Months Ended

Dec. 31, 2011

Basis of Presentation [Abstract]

Basis of Presentation

2)	Basis of Presentation

The consolidated financial statements include the accounts of MKS Instruments, Inc. and its wholly owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation.

Use of Estimates and Reclassifications

The consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The preparation of these financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. On an on-going basis, management evaluates its estimates and judgments, including those related to revenue recognition, stock-based compensation, inventory, intangible assets, goodwill, and other long-lived assets, acquisition expenses, income taxes and investments. Management bases its estimates and judgments on historical experience and on various other factors that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

During 2010, the Company divested two product lines, as their growth potential no longer met the Company’s long-term strategic objectives. The Company completed the sale of Ion Systems, Inc. (“Ion”) during the second quarter of 2010 and the sale of the assets of the Yield Dynamics, LLC (“YDI”) business during the third quarter of 2010. The results of operations of the two product lines have been classified as discontinued operations in the consolidated statements of operations for all periods presented. The assets and liabilities of these discontinued product lines have not been reclassified and segregated in the consolidated balance sheets or consolidated statements of cash flows due to their immaterial amounts. Refer to Note 17 for additional disclosure of the discontinued operations.

For the year 2009, shown in the table below, the Company revised the amounts related to cash provided by operating activities and cash used in financing activities in its consolidated statements of cash flows to correct for immaterial errors. These corrections related to adjusting the excess tax benefit amounts associated with stock-based compensation.


	2009
Net cash provided by operating activities:
As reported	$	7,368
As adjusted		4,903

Change	$	(2,465	)

Net cash used in financing activities:
As reported	$	(8,021	)
As adjusted		(5,556	)

Change	$	2,465

- Definition

Description of the basis of accounting used to prepare the financial statements (for example, U.S. Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). And describes an entity's accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. An entity also may describe its accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary. And provides an entity's explanation that the preparation of financial statements in conformity with generally accepted accounting principles requires the use of management estimates. Estimates used in the determination of carrying amounts of assets or liabilities, or in disclosure of gain or loss contingencies should be disclosed if known information available prior to issuance of the financial statements indicates that both of these criteria are met: (1) It is at least reasonably possible that the estimate of the effect on the financial statements of a condition, situation, or set of circumstances that existed at the date of the financial statements will change in the near term (less than one year from the date of issuance) due to one or more future confirming events, and (2) The effect of the change would be material to the financial statements. The disclosure should indicate the nature of the uncertainty and include an indication that it is at least reasonably possible that a change in the estimate will occur in the near term. Disclosure of the factors that cause the estimate to be sensitive to change also is encouraged. Entities also may identify those areas that are subject to significant estimates. And classifications in the current financial statements may be different from classifications in the prior year's financial statements. Disclose any material changes in classification including an explanation of the reason for the change and the areas impacted.

+ References + Details

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2011

Summary of Significant Accounting Policies [Abstract]

Summary of Significant Accounting Policies

3)	Summary of Significant Accounting Policies

Revenue Recognition and Accounts Receivable Allowances

Revenue from product sales is recorded upon transfer of title and risk of loss to the customer provided that there is evidence of an arrangement, the sales price is fixed or determinable, and collection of the related receivable is reasonably assured. In most transactions, the Company has no obligations to customers after the date products are shipped other than pursuant to warranty obligations. In some instances, the Company provides installation, training, support and services to customers after the product has been shipped. For revenue arrangements with multiple deliverables, we allocate revenue to each element based upon their relative selling price using vendor-specific objective evidence (“VSOE”), or third-party evidence (“TPE”) or based upon the relative selling price using estimated prices if VSOE or TPE does not exist. We then recognize revenue on each deliverable in accordance with our policies for product and service revenue recognition. The Company provides for the estimated costs to fulfill customer warranty obligations upon the recognition of the related revenue. Shipping and handling fees, if any, billed to customers are recognized as revenue. The related shipping and handling costs are recognized in cost of sales. Accounts receivable allowances include sales returns and bad debt allowances. The Company monitors and tracks the amount of product returns and reduces revenue at the time of shipment for the estimated amount of such future returns, based on historical experience. The Company makes estimates evaluating its allowance for doubtful accounts. The Company continuously monitors collections and payments from its customers and maintains a provision for estimated credit losses based upon its historical experience and any specific customer collection issues that it has identified.

Research and Development

Research and development costs are expensed as incurred and consist mainly of compensation related expenses and project materials. The Company’s research and development efforts include numerous projects, which generally have a duration of 3 to 30 months. Acquired in-process research and development (“IPR&D”) expenses, which are capitalized at fair value as an intangible asset until the related project is completed, are then amortized over the estimated useful life of the product. Projects that are abandoned are immediately written off. In 2009 and prior years, IPR&D was expensed as incurred.

Advertising Costs

Advertising costs are expensed as incurred and were immaterial in 2011, 2010 and 2009.

Stock-Based Compensation

The accounting for share-based compensation expense requires the measurement and recognition of compensation expense for all share-based payment awards made to employees and directors based on estimated fair values. For restricted stock units (“RSUs”), the fair value is the fair value on the date of grant. The Company has estimated the fair value of share-based options on the date of grant using the Black Scholes pricing model, which is affected by the Company’s stock price as well as assumptions regarding a number of complex and subjective variables. These variables include the Company’s expected stock price volatility over the term of the awards, expected life, risk free interest rate and expected dividends. The Company is also required to estimate forfeitures at the time of grant and revise those estimates in subsequent periods if actual forfeitures differ from those estimates.

Management determined that blended volatility, a combination of historical and implied volatility, is more reflective of market conditions and a better indicator of expected volatility than historical or implied volatility alone. The assumptions used in calculating the fair value of share-based payment awards represent management’s best estimates, but these estimates involve inherent uncertainties and the application of management judgment. As a result, if factors change and the Company uses different assumptions, its stock-based compensation expense could be materially different in the future.

Other Comprehensive Income

For foreign subsidiaries where the functional currency is the local currency, assets and liabilities are translated into U.S. dollars at the current exchange rate on the balance sheet date. Revenue and expenses are translated at average rates of exchange prevailing during the year. Translation adjustments resulting from this process are recorded to Other Comprehensive Income (“OCI”).

Unrealized gains and losses on securities classified as available-for-sale are included in accumulated other comprehensive income in consolidated stockholders’ equity.

For derivative instruments designated as cash-flow hedges, the effective portion of the derivative’s gain (loss) is initially reported as a component of OCI and is subsequently recognized in earnings when the hedged exposure is recognized in earnings.

Net Income Per Share

Basic earnings per share is based on the weighted average number of common shares outstanding, and diluted earnings per share is based on the weighted average number of common shares outstanding and all potential dilutive common equivalent shares outstanding. The dilutive effect of options is determined under the treasury stock method using the average market price for the period. Common equivalent shares are included in the per share calculations when the effect of their inclusion would be dilutive.

Cash and Cash Equivalents and Investments

All highly liquid investments with a maturity date of three months or less at the date of purchase are considered to be cash equivalents. The appropriate classification of investments in securities is determined at the time of purchase. Debt securities that the Company does not have the intent and ability to hold to maturity are classified as “available-for-sale” and are carried at fair value. Mutual funds that are bought and held principally for the purpose of selling them in the near term are classified as “trading” and are carried at fair value.

The Company reviews its investment portfolio on a monthly basis to identify and evaluate individual investments that have indications of possible impairment. The factors considered in determining whether a loss is other-than-temporary include: the length of time and extent to which fair market value has been below the cost basis, the financial condition and near-term prospects of the issuer, credit quality, and the Company’s ability to hold the investment for a period of time sufficient to allow for any anticipated recovery in fair value.

Concentrations of Credit Risk

The Company’s significant concentrations of credit risk consist principally of cash and cash equivalents, investments, forward exchange contracts and trade accounts receivable. The Company maintains cash and cash equivalents with financial institutions including some banks with which it had borrowings. The Company maintains investments primarily in U.S. Treasury and government agency securities and corporate debt securities. The Company enters into forward currency contracts with high credit-quality financial institutions in order to minimize credit risk exposure. The Company’s customers are primarily concentrated in the semiconductor industry, and a limited number of customers account for a significant portion of the Company’s revenues. The Company regularly monitors the creditworthiness of its customers and believes it has adequately provided for potential credit loss exposures. Credit is extended for all customers based primarily on financial condition and collateral is not required.

The Company had one customer comprising 14%, 16% and 13% of net sales for 2011, 2010 and 2009, respectively. During the years 2011, 2010 and 2009, the Company estimated that approximately 61%, 64% and 52% of its net sales, respectively, were to semiconductor capital equipment manufacturers and semiconductor device manufacturers. There were no customers comprising 10% or more of the Company’s accounts receivable balance as of December 31, 2011.

Inventories

The Company values its inventory at the lower of cost (first-in, first-out method) or market. The Company regularly reviews inventory quantities on hand and records a provision to write-down excess and obsolete inventory to its estimated net realizable value, if less than cost, based primarily on its estimated forecast of product demand.

Property, Plant and Equipment

Property, plant and equipment are stated at cost. Equipment acquired under capital leases is recorded at the present value of the minimum lease payments required during the lease period. Expenditures for major renewals and betterments that extend the useful lives of property, plant and equipment are capitalized. Expenditures for maintenance and repairs are charged to expense as incurred. When assets are sold or otherwise disposed of, the cost and related accumulated depreciation are eliminated from the accounts and any resulting gain or loss is recognized in earnings.

Depreciation is provided on the straight-line method over the estimated useful lives of twenty to thirty-one and one-half years for buildings and three to seven years for machinery and equipment, furniture and fixtures and office equipment, which includes enterprise resource planning software. Leasehold improvements are amortized over the shorter of the lease term or the estimated useful life of the leased asset.

Intangible Assets

Intangible assets resulting from the acquisitions of entities are estimated by management based on the fair value of assets acquired. These include acquired customer lists, technology, patents, trade names, covenants not to compete and IPR&D. Intangible assets are amortized from two to eight years on a straight-line basis which represents the estimated periods of benefit and the expected pattern of consumption. During 2009, the Company recorded impairments of indefinite-lived intangible assets of $11,699. These impairment charges are classified in discontinued operations in the consolidated statements of operations as the intangible assets relate to the two discontinued product lines.

Goodwill

Goodwill is the amount by which the cost of acquired net assets exceeded the fair value of those net assets on the date of acquisition. The Company allocates goodwill to reporting units at the time of acquisition or when there is a change in the reporting structure and bases that allocation on which reporting units will benefit from the acquired assets and liabilities. Reporting units are defined as operating segments or one level below an operating segment, referred to as a component. The Company has determined that its reporting units are components of its one operating segment. The Company assesses goodwill for impairment on an annual basis as of October 31 or more frequently when events and circumstances occur indicating that the recorded goodwill may be impaired. If the book value of a reporting unit exceeds its fair value, the implied fair value of goodwill is compared with the carrying amount of goodwill. If the carrying amount of goodwill exceeds the implied fair value, an impairment loss is recorded equal to that excess. During 2009, the Company recorded a goodwill impairment charge of $193,254. In 2010, the Company reclassified $53,840 of the goodwill impairment charge to discontinued operations as it related to the two discontinued product lines.

Impairment of Long-Lived Assets

The Company evaluates the recoverability of its long-lived assets whenever events and changes in circumstances indicate that the carrying amount of an asset may not be fully recoverable. This periodic review may result in an adjustment of estimated depreciable lives or asset impairment. When indicators of impairment are present, the carrying values of the asset are evaluated in relation to their operating performance and future undiscounted cash flows of the underlying business. If the future undiscounted cash flows are less than their book value, impairment exists. The impairment is measured as the difference between the book value and the fair value of the underlying asset. Fair values are based on estimates of market prices and assumptions concerning the amount and timing of estimated future cash flows and assumed discount rates, reflecting varying degrees of perceived risk. During 2009, the Company recorded an impairment charge of $3,544 resulting from the write-down of the value of a building to its estimated fair value.

Foreign Exchange

The functional currency of the majority of the Company’s foreign subsidiaries is the applicable local currency. For those subsidiaries, assets and liabilities are translated to U.S. dollars at year-end exchange rates. Income and expense accounts are translated at the average exchange rates prevailing during the year. The resulting translation adjustments are included in accumulated other comprehensive income in consolidated stockholders’ equity. Foreign exchange transaction gains and losses, which arise from transaction activity, are reflected in selling, general and administrative expenses in the statement of operations.

Income Taxes

The Company records income taxes using the asset and liability method. Deferred income tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective income tax bases, and operating loss and tax credit carryforwards. On a quarterly basis, the Company evaluates both the positive and negative evidence that affects the realizability of net deferred tax assets and assesses the need for a valuation allowance. The future benefit to be derived from its deferred tax assets is dependent upon its ability to generate sufficient future taxable income to realize the assets. The Company records a valuation allowance to reduce its net deferred tax assets to the amount that is more likely than not to be realized. To the extent the Company establishes a valuation allowance an expense will be recorded as a component of the provision for income taxes on the statement of operations. As of December 31, 2009, the Company had a valuation allowance of $5,201 primarily related to state tax credit carryforwards. During 2010, the Company increased the valuation allowance by $20,066 primarily related to capital losses incurred from its divested business operations, as the Company determined it is more likely than not that this tax attribute will not be realized. As a result, the valuation allowance was $25,267 at December 31, 2010. During 2011, the Company increased its valuation allowance by $1,208 primarily related to capital losses incurred from its foreign affiliates as management determined it is more likely than not that the deferred tax assets related to these attributes will not be realized. As a result, the valuation allowance is $26,475 at December 31, 2011.

Accounting for income taxes requires a two-step approach to recognize and measure uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if, based on the technical merits, it is more likely than not that the position will be sustained upon audit, including resolutions of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon ultimate settlement. The Company reevaluates these uncertain tax positions on a quarterly basis. This evaluation is based on factors including, but not limited to, changes in facts or circumstances, changes in tax law, effectively settled issues under audit and new audit activity. Any change in these factors could result in the recognition of a tax benefit or an additional charge to the tax provision.

Recently Issued Accounting Pronouncements

12 Months Ended

Dec. 31, 2011

Recently Issued Accounting Pronouncements [Abstract]

Recently Issued Accounting Pronouncements

4)	Recently Issued Accounting Pronouncements

In September 2011, the Financial Accounting Standards Board (“FASB”) issued an Accounting Standards Update (“ASU”) which simplifies how companies test goodwill for impairment. Under the amendments, an entity has the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, an entity determines it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then performing the two-step impairment test is unnecessary. However, if an entity concludes otherwise, then it is required to perform the first step of the two-step impairment test by calculating the fair value of the reporting unit and comparing the fair value with the carrying amount of the reporting unit, as described in the goodwill accounting standard. The amendments are effective for annual and interim goodwill impairment tests performed for fiscal years beginning after December 15, 2011. Early adoption is permitted. The Company adopted this new ASU in the fourth quarter of 2011. The new ASU did not have a material effect on its consolidated financial statements.

In June 2011, the FASB issued an ASU which eliminates the option to present the components of other comprehensive income as part of the statement of equity and requires an entity to present the total of comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. The amendments are effective retrospectively for fiscal years, and interim periods within those years, beginning after December 15, 2011. The ASU requires changes in presentation only and the Company does not expect it will have a material effect on its consolidated financial statements.

In May 2011, the FASB issued an ASU which applies to all reporting entities that are required or permitted to measure or disclose the fair value of an asset, a liability, or an instrument classified in a reporting entity’s shareholders’ equity in the financial statements. The amendments do not extend the use of fair value accounting, but provide guidance on how it should be applied where its use is already required or permitted by other standards within U.S. GAAP. The amendments change the wording used to describe many requirements in U.S. GAAP for measuring fair value and for disclosing information about fair value measurements. Additionally, the ASU clarifies the FASB’s intent about the application of existing fair value measurements. The amendments in this ASU are to be applied prospectively. For public entities, the amendments are effective during interim and annual periods beginning after December 15, 2011. Early application by public entities is not permitted. The Company does not expect the new ASU to have a material effect on its consolidated financial statements.

Investments

12 Months Ended

Dec. 31, 2011

Investments [Abstract]

Investments

5)	Investments

The fair value of short-term investments with maturities or estimated lives of less than one year consists of the following:


	Years Ended December 31,
	2011		2010
Available-for-sale investments:
Time deposits	$	37	$	15,716
Bankers acceptance drafts		962		—
U.S. treasury obligations		29,404		76,542
U.S. agency obligations		221,565		176,708
Mutual funds(1)		—		491

		251,968		269,457
Trading investments:
Mutual funds(1)		635		—

	$	252,603	$	269,457

(1)

During the third quarter of 2011, the Company re-classified the mutual funds from short-term available-for-sale investments to trading investments as it was management’s intention that these investments would be actively traded. The mutual funds are associated with the Company’s supplemental defined contribution retirement obligations.

The fair value of long-term available-for-sale investments with maturities or estimated lives of more than one year consists of the following:


	Years Ended December 31,
	2011		2010
U.S. agency obligations	$	7,873	$	—

The following table shows the gross unrealized gains and (losses) aggregated by investment category for short-term and long-term available-for-sale investments:


	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
As of December 31, 2011:
Short-term investments:
Available-for-sale investments:
Time deposits	$	37	$	—	$	—		$	37
Bankers acceptance drafts		962		—		—			962
U.S. treasury obligations		29,393		11		—			29,404
U.S. agency obligations		221,516		56		(7	)		221,565

	$	251,908	$	67	$	(7	)	$	251,968
Long-term investments:
U.S. agency obligations	$	7,876	$	—	$	(3	)	$	7,873


	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
As of December 31, 2010:
Short-term investments:
Available-for-sale investments:
Time deposits	$	15,716	$	—	$	—		$	15,716
U.S. treasury obligations		76,538		4		—			76,542
U.S. agency obligations		176,702		38		(32	)		176,708
Mutual funds		659		—		(168	)		491

	$	269,615	$	42	$	(200	)	$	269,457

Interest income is accrued as earned. Dividend income is recognized as income on the date the stock trades “ex-dividend.” The cost of marketable securities sold is determined by the specific identification method and realized gains or losses are reflected in income and were not material in 2011, 2010 and 2009.

The unrealized gains and losses for trading investments were immaterial in 2011.

- Definition

Tabular disclosure of investments in certain debt and equity securities (and certain other trading assets) which include all debt and equity securities (other than those equity securities accounted for under the equity or cost methods of accounting) with readily determinable fair values. Other trading assets include assets that are carried on the balance sheet at fair value and held for trading purposes. A debt security represents a creditor relationship with an enterprise that is in the form of a security. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities (and other trading assets).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 3, 19, 20, 21, 22, 137
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27405-111563

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27232-111563

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Debt Security
-URI http://asc.fasb.org/extlink&oid=6509901
-Topic 320

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Equity Security
-URI http://asc.fasb.org/extlink&oid=6511694
-Topic 320

+ Details

Fair Value Measurements

12 Months Ended

Dec. 31, 2011

Fair Value Measurements [Abstract]

Fair Value Measurements

6)	Fair Value Measurements

In accordance with the provisions of fair value accounting, a fair value measurement assumes that the transaction to sell an asset or transfer a liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability and defines fair value based upon an exit price model.

The fair value measurement guidance establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The guidance describes three levels of inputs that may be used to measure fair value:


Level 1		Quoted prices in active markets for identical assets or liabilities as of the reporting date. Active markets are those in which transactions for the asset or liability occur in sufficient frequency and volume to provide pricing information on an ongoing basis.
Level 2		Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 assets and liabilities include debt securities with quoted prices that are traded less frequently than exchange-traded instruments or securities or derivative contracts that are valued using a pricing model with inputs that are observable in the market or can be derived principally from or corroborated by observable market data.
Level 3		Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation.

In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, we categorize such assets and liabilities based on the lowest level input that is significant to the fair value measurement in its entirety. Our assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset.

Assets and liabilities of the Company measured at fair value on a recurring basis as of December 31, 2011, are summarized as follows:


			Fair Value Measurements at Reporting Date Using
Description	December 31, 2011		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents: Money market funds	$	137,976	$	137,976	$	—	$	—
Trading securities:
Mutual funds		635		635		—		—
Available-for-sale securities:
Bankers acceptance drafts		962		—		962		—
U.S. treasury obligations		29,404		—		29,404		—
U.S. agency obligations		229,438		147,546		81,892		—
Derivatives — currency forward contracts		531		—		531		—

Total assets	$	398,946	$	286,157	$	112,789	$	—

Liabilities:
Derivatives — currency forward contracts	$	1,054	$	—	$	1,054	$	—

Reported as follows:
Assets:
Cash and cash equivalents(1)	$	137,976	$	137,976	$	—	$	—
Short-term investments(2)		252,566		140,308		112,258		—
Other current assets		531		—		531		—

	$	391,073	$	278,284	$	112,789	$	—

Long-term investments	$	7,873	$	7,873	$	—	$	—

Liabilities:
Other current liabilities	$	1,054	$	—	$	1,054	$	—

(1)	The cash and cash equivalent amounts presented in the table above do not include cash of $146,035 and non-negotiable time deposits of $28,905 as of December 31, 2011.

(2)	The short-term investments presented in the table above do not include non-negotiable time deposits of $37 as of December 31, 2011.

Assets and liabilities of the Company measured at fair value on a recurring basis as of December 31, 2010, are summarized as follows:


			Fair Value Measurements at Reporting Date Using
Description	December 31, 2010		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents:
Money market funds	$	7,032	$	7,032	$	—	$	—
Bankers acceptance drafts		2,838		—		2,838		—
U.S. treasury obligations		29,996		29,996		—		—
U.S. agency obligations		14,795		14,795		—		—
Available-for-sale securities:
U.S. treasury obligations		76,543		76,543		—		—
U.S. agency obligations		176,707		176,707		—		—
Mutual funds		491		491		—		—
Derivatives — currency forward contracts		369		—		369		—

Total assets	$	308,771	$	305,564	$	3,207	$	—

Liabilities:
Derivatives — currency forward contracts	$	3,463	$	—	$	3,463	$	—

Reported as follows:
Assets:
Cash and cash equivalents(1)	$	54,661	$	51,823	$	2,838	$	—
Short-term investments(2)		253,741		253,741		—		—
Other current assets		369		—		369		—

	$	308,771	$	305,564	$	3,207	$	—

Liabilities:
Other current liabilities	$	3,463	$	—	$	3,463	$	—

(1)	The cash and cash equivalent amounts presented in the table above, do not include cash of $107,815 as of December 31, 2010.

(2)	The short-term investment amounts presented in the table above do not include $15,716 as of December 31, 2010. These amounts represent non-negotiable time deposits which are not subject to the fair value disclosure requirements.

Money Market Funds

Money market funds are cash and cash equivalents and are classified within Level 1 of the fair value hierarchy.

Trading Mutual Fund Investments

As of December 31, 2011, trading investments consisted of certain U.S. and international equity mutual funds and government agency fixed income mutual funds. In 2011, management changed the classification of the investments from available-for-sale to trading investments. These investments were classified as available-for-sale at December 31, 2010. These investments are classified within Level 1 of the fair value hierarchy.

Available-For-Sale Investments

As of December 31, 2011 and December 31, 2010, available-for-sale investments consisted of time deposits and drafts denominated in the Euro currency, U.S. treasury obligations and U.S. agency obligations. U.S. agency obligations include certain corporate obligations issued under the government’s Term Loan Guarantee Program which removes any credit risk associated with the corporate issuing entity, as they become obligations of the U.S. government should the corporate issuer be unable to honor its obligations.

The Company measures its debt and equity investments at fair value. The Company’s available-for-sale investments are classified within Level 1 and Level 2 of the fair value hierarchy.

Derivatives

As a result of the Company’s global operating activities, the Company is exposed to market risks from changes in foreign currency exchange rates, which may adversely affect its operating results and financial position. When deemed appropriate, the Company minimizes its risks from foreign currency exchange rate fluctuations through the use of derivative financial instruments. The principal market in which the Company executes its foreign currency contracts is the institutional market in an over-the-counter environment with a relatively high level of price transparency. The market participants usually are large commercial banks. The forward foreign currency exchange contracts are valued using broker quotations, or market transactions and are classified within Level 2 of the fair value hierarchy.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44A, 44B
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15C, 15D
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15A
-Subparagraph a-d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15B
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 3, 10, 14, 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32, 33, 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 159
-Paragraph 17-22, 27, 28
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13537-108611

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13433-108611

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13504-108611

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19296-110258

+ Details

Derivatives

12 Months Ended

Dec. 31, 2011

Derivatives [Abstract]

Derivatives

7)	Derivatives

The Company enters into derivative instruments for risk management purposes only, including derivatives designated as hedging instruments and those utilized as economic hedges. The Company operates internationally and, in the normal course of business, is exposed to fluctuations in interest rates and foreign exchange rates. These fluctuations can increase the costs of financing, investing and operating the business. The Company has used derivative instruments, such as forward contracts, to manage certain foreign currency exposure.

By nature, all financial instruments involve market and credit risks. The Company enters into derivative instruments with major investment grade financial institutions and no collateral is required. The Company has policies to monitor the credit risk of these counterparties. While there can be no assurance, the Company does not anticipate any material non-performance by any of these counterparties.

The Company hedges a portion of its forecasted foreign currency denominated intercompany sales of inventory, over a maximum period of eighteen months, using forward foreign exchange contracts accounted for as cash-flow hedges related to Japanese, South Korean, British and European currencies. To the extent these derivatives are effective in off-setting the variability of the hedged cash flows, and otherwise meet the hedge accounting criteria, changes in the derivatives’ fair value are not included in current earnings but are included in OCI in stockholders’ equity. These changes in fair value will subsequently be reclassified into earnings, as applicable, when the forecasted transaction occurs. To the extent that a previously designated hedging transaction is no longer an effective hedge, any ineffectiveness measured in the hedging relationship is recorded currently in earnings in the period it occurs. The cash flows resulting from forward exchange contracts are classified in the consolidated statements of cash flows as part of cash flows from operating activities. The Company does not enter into derivative instruments for trading or speculative purposes.

To the extent the hedge accounting criteria is not met, the related foreign currency forward contracts are considered as economic hedges and changes in the fair value of these contracts are recorded immediately in earnings in the period in which they occur. These include hedges that are used to reduce exchange rate risks arising from the change in fair value of certain foreign currency denominated assets and liabilities (i.e., payables, receivables) and other economic hedges where the hedge accounting criteria were not met.

As of December 31, 2011 and 2010, the Company had outstanding forward foreign exchange contracts with gross notional values of $36,119 and $87,666, respectively. The following tables provide a summary of the primary net hedging positions and corresponding fair values held as of December 31, 2011 and 2010:


	December 31, 2011
Currency Hedged (Buy/Sell)	Gross Notional Value		Fair Value(1)
U.S. Dollar/Japanese Yen	$	18,676	$	(961	)
U.S. Dollar/South Korean Won		10,799		60
U.S. Dollar/Euro		3,869		288
U.S. Dollar/U.K. Pound Sterling		2,775		90

Total	$	36,119	$	(523	)


	December 31, 2010
Currency Hedged (Buy/Sell)	Gross Notional Value		Fair Value(1)
U.S. Dollar/Japanese Yen	$	50,104	$	(2,876	)
U.S. Dollar/South Korean Won		27,574		(563	)
U.S. Dollar/Euro		6,934		305
U.S. Dollar/U.K. Pound Sterling		3,054		40

Total	$	87,666	$	(3,094	)

(1)	Represents the net receivable (payable) amount included in the consolidated balance sheet.

The following table provides a summary of the fair value amounts of the Company’s derivative instruments:


	Years Ended December 31,
Derivatives Designated as Hedging Instruments	2011			2010
Derivative assets:
Forward exchange contracts	$	531		$	369
Derivative liabilities:
Forward exchange contracts		(1,054	)		(3,463	)

Total net derivative asset (liability) designated as hedging instruments(1)	$	(523	)	$	(3,094	)

The derivative asset of $531 and derivative liability of $1,054 are classified in other current assets and other current liabilities, respectively, in the consolidated balance sheet as of December 31, 2011. The derivative asset of $369 and derivative liability of $3,463 are classified in other current assets and other current liabilities, respectively, in the consolidated balance sheet as of December 31, 2010.

The following table provides a summary of the gains (losses) on derivatives designated as hedging instruments:


	Years Ended December 31,
Derivatives Designated as Cash Flow Hedging Relationships	2011			2010			2009
Forward exchange contracts:
Net gain (loss) recognized in OCI(1)	$	4,311		$	(3,346	)	$	1,290
Net gain (loss) reclassified from accumulated OCI into income(2)	$	(4,021	)		(957	)		1,062
Net gain recognized in income(3)		—			—			313

(1)	Net change in the fair value of the effective portion classified in OCI.

(2)	Effective portion classified as selling, general and administrative in 2011 and as cost of products in 2010 and 2009, respectively.

(3)	Ineffective portion amount excluded from effectiveness testing, classified in selling, general and administrative.

The following table provides a summary of gains on derivatives not designated as hedging instruments:


	Years Ended December 31,
Derivatives Not Designated as Hedging Instruments	2011		2010		2009
Forward exchange contracts:
Net gain recognized in income(1)	$	—	$	—	$	9

(1)	Classified in selling, general and administrative.

- Definition

The entire disclosure for the entity's entire derivative instruments and hedging activities. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising therefrom, and the amounts of and methodologies and assumptions used in determining the amounts of such items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 45
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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+ Details

Inventories

12 Months Ended

Dec. 31, 2011

Inventories [Abstract]

Inventories

8)	Inventories

Inventories consist of the following:


	Years Ended December 31,
	2011		2010
Raw material	$	78,501	$	82,012
Work in process		21,298		21,891
Finished goods		53,833		52,526

	$	153,632	$	156,429

Inventory related excess and obsolete charges of $14,857, $13,230 and $20,335 were recorded in cost of products in the years ended December 31, 2011, 2010 and 2009, respectively.

Property, Plant and Equipment

12 Months Ended

Dec. 31, 2011

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

9)	Property, Plant and Equipment

Property, plant and equipment consist of the following:


	Years Ended December 31,
	2011		2010
Land	$	8,119	$	8,131
Buildings		64,962		63,633
Machinery and equipment		107,304		97,888
Furniture and fixtures, office equipment and software		48,516		50,642
Leasehold improvements		18,617		18,385
Construction in progress		7,075		3,968

		254,593		242,647
Less: accumulated depreciation and amortization		182,106		173,671

	$	72,487	$	68,976

Depreciation and amortization of property, plant and equipment totaled $11,965, $12,298 and $14,352 for the years 2011, 2010 and 2009, respectively. In 2010, the Company reclassified $85 and $264 of depreciation and amortization of property, plant and equipment to discontinued operations for the years 2010 and 2009, respectively.

- Definition

The entire disclosure for long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. This disclosure may include property plant and equipment accounting policies and methodology, a schedule of property, plant and equipment gross, additions, deletions, transfers and other changes, depreciation, depletion and amortization expense, net, accumulated depreciation, depletion and amortization expense and useful lives, income statement disclosures, assets held for sale and public utility disclosures.

+ References + Details

Goodwill, Intangible Assets and Other Long-Lived Assets

12 Months Ended

Dec. 31, 2011

Goodwill, Intangible Assets and Other Long-Lived Assets [Abstract]

Goodwill, Intangible Assets and Other Long-Lived Assets

10)

Goodwill, Intangible Assets and Other Long-Lived Assets

Goodwill

The Company’s methodology for allocating the purchase price relating to purchase acquisitions is determined through established and generally accepted valuation techniques. Goodwill is measured as the excess of the cost of the acquisition over the sum of the amounts assigned to tangible and identifiable intangible assets acquired less liabilities assumed. The Company assigns assets acquired (including goodwill) and liabilities assumed to one or more reporting units as of the date of acquisition. Typically, acquisitions relate to a single reporting unit and thus do not require the allocation of goodwill to multiple reporting units. If the products obtained in an acquisition are assigned to multiple reporting units, the goodwill is distributed to the respective reporting units as part of the purchase price allocation process.

Goodwill and purchased intangible assets with indefinite useful lives are not amortized, but are reviewed for impairment annually during the fourth quarter of each fiscal year and whenever events or changes in circumstances indicate that the carrying value of an asset may not be recoverable. The process of evaluating the potential impairment of goodwill and intangible assets requires significant judgment, especially in emerging markets. The Company regularly monitors current business conditions and other factors including, but not limited to, adverse industry or economic trends, restructuring actions and lower projections of profitability that may impact future operating results.

In 2011, the Company adopted authoritative guidance that allows it to utilize a qualitative approach to test goodwill for impairment. This authoritative guidance permitted the Company to first perform a qualitative assessment to determine whether it is more likely than not that the fair value of its reporting units is less than their carrying value. For the reporting units that did not experience any significant adverse changes in their business or reporting structures or any other adverse changes, and the reporting unit’s fair value substantially exceeded its amount from the prior year assessment, then the Company performed the qualitative Step 0 assessment. In performing the qualitative Step 0 assessment, the Company considered certain events and circumstances specific to the reporting unit and to the entity as a whole, such as macroeconomic conditions, industry and market considerations, overall financial performance and cost factors when evaluating whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. For the remaining reporting units that did not meet the criteria, the Company performed the two-step goodwill impairment test. Under the two-step goodwill impairment test the Company compares the fair value of each reporting unit to its respective carrying amount, including goodwill. If the fair value of the reporting unit exceeds its carrying amount, goodwill of the reporting unit is not considered impaired. If the reporting unit’s carrying amount exceeds the fair value, the second step of the goodwill impairment test must be completed to measure the amount of the impairment loss, if any. The second step compares the implied fair value of goodwill with the carrying value of goodwill. The implied fair value is determined by allocating the fair value of the reporting unit to all of the assets and liabilities of that unit, the excess of the fair value over amounts assigned to its assets and liabilities is the implied fair value of goodwill. The implied fair value of goodwill determined in this step is compared to the carrying value of goodwill. If the implied fair value of goodwill is less than the carrying value of goodwill, an impairment loss is recognized equal to the difference.

We determined the fair value of our reporting units using a DCF analysis. Determining fair value requires the exercise of significant judgment, including judgments about appropriate discount rates, perpetual growth rates, and the amount and timing of expected future cash flows. Discount rates are based on a weighted average cost of capital (“WACC”), which represents the average rate a business must pay its providers of debt and equity. The WACC used to test goodwill was derived from a group of comparable companies. The cash flows employed in the DCF analysis were derived from internal earnings and forecasts and external market forecasts.

As of October 31, 2011, the Company performed its annual impairment assessment of goodwill and determined that it is more likely than not that the fair values of the reporting units exceed their carrying amount.

During the second quarter of 2009, the Company determined an interim assessment for impairment should be conducted for its goodwill due to various factors, including market and economic conditions that contributed to a decline in the Company’s forecasted business levels, and the excess of the Company’s consolidated net assets over its market capitalization for a sustained period of time. During this interim assessment, the Company determined that for certain reporting units, the carrying amount of their net assets exceeded their respective fair values, indicating that a potential impairment existed. After completing the second step of the goodwill impairment test, the Company recorded a goodwill impairment charge in the second quarter of 2009 of $193,254. In 2010, the Company reclassified $53,840 of the goodwill impairment charge to discontinued operations for 2009 as it related to the two discontinued product lines.

The changes in the carrying amount of goodwill and accumulated impairment losses were as follows:


	2011							2010
	Gross Carrying Amount		Accumulated Impairment Loss			Net		Gross Carrying Amount			Accumulated Impairment Loss			Net
Beginning balance at January 1	$	279,434	$	(139,414	)	$	140,020	$	337,765		$	(193,254	)	$	144,511
Acquired goodwill(1)(2)		64		—			64		2,292			—			2,292
Sale of discontinued operations(3)		—		—			—		(60,623	)		53,840			(6,783	)

Ending balance at December 31	$	279,498	$	(139,414	)	$	140,084	$	279,434		$	(139,414	)	$	140,020

(1)	In September 2011, the Company purchased a product line from GE Osmonics, Inc. for $458. The Company recorded $315 of intangible assets and $64 of goodwill in connection with the acquisition.

(2)	In November 2010, the Company purchased a technology company for $2,447 to enhance its product portfolio. The Company recorded $2,292 of goodwill in connection with the acquisition.

(3)	In May 2010, the Company sold its Ion business and in August 2010 it sold the assets of its YDI business and as a result charged the related goodwill to the gain on sale of discontinued operations.

Intangible Assets

The Company is required to test certain long-lived assets when indicators of impairment are present. For the purposes of the impairment test, long-lived assets are grouped with other assets and liabilities at the lowest level for which identifiable cash flows are largely independent of the cash flows of other assets and liabilities. Due to various factors, including market and economic conditions that contributed to a decline in the Company’s forecasted business levels, and the excess of the Company’s consolidated net assets over market capitalization for a sustained period of time, the Company concluded an interim assessment for impairment should be conducted for its intangible assets as of April 30, 2009. The Company tested the long-lived assets in question for recoverability by comparing the sum of the undiscounted cash flows attributable to each respective asset group to their carrying amounts, and determined that the carrying amounts were not recoverable. Management then evaluated the fair values of each long-lived asset of the potentially impaired long-lived asset group to determine the amount of the impairment, if any. The fair value of each intangible asset was based primarily on an income approach, which is a present value technique used to measure the fair value of future cash flows produced by the asset. The Company estimated future cash flows over the remaining useful life of each intangible asset. As a result of this analysis, the Company determined that certain of its intangible assets related to completed technology, customer relationships, and patents and trademarks had carrying values that exceeded their estimated fair values. As a result, an impairment charge of $11,699 was recorded in the second quarter of 2009. This impairment charge is classified in discontinued operations in the consolidated statement of operations as the intangible assets relate to the two discontinued product lines.

Components of the Company’s acquired intangible assets are comprised of the following:


As of December 31, 2011:	Gross		Accumulated Amortization			Net
Completed technology	$	76,829	$	(76,829	)	$	—
Customer relationships		9,190		(8,393	)		797
Patents, trademarks, trade names and other		24,703		(24,457	)		246

	$	110,722	$	(109,679	)	$	1,043


As of December 31, 2010:	Gross(1)		Accumulated Amortization(1)			Net
Completed technology	$	76,829	$	(76,230	)	$	599
Customer relationships		8,940		(8,083	)		857
Patents, trademarks, trade names and other		24,638		(24,351	)		287

	$	110,407	$	(108,664	)	$	1,743

(1)	Excludes $18,299 and $16,603 from gross and accumulated amortization, respectively, as a result of the Company’s sale of its Ion business and assets of its YDI business.

Aggregate amortization expense related to acquired intangibles for the years 2011, 2010 and 2009 were $1,015, $1,525 and $4,407, respectively. In 2010, the Company reclassified $242 and $1,645 of amortization expense to discontinued operations for the years 2010 and 2009, respectively. Estimated amortization expense for each of the five remaining fiscal years and thereafter is as follows:


Year	Amount
2012	$	436
2013		423
2014		52
2015		36
2016		36
Thereafter		60

Long-Lived Assets

The Company is required to test long-lived assets, which exclude goodwill and intangible assets that are not amortized, when indicators of impairment are present. For purposes of this test, long-lived assets are grouped with other assets and liabilities at the lowest level for which identifiable cash flows are largely independent of the cash flows of other assets and liabilities. When we determine that indicators of potential impairment exist, the next step of the impairment test requires that the potentially impaired long-lived asset group is tested for recoverability. The test for recoverability compares the undiscounted future cash flows of the long-lived asset group to its carrying value. If the carrying values of the long-lived asset group exceed the future cash flows, the assets are considered to be potentially impaired. The next step in the impairment process is to determine the fair value of the individual net assets within the long-lived asset group. If the aggregate fair values of the individual net assets of the group are less than the carrying values, an impairment charge is recorded equal to the excess of the aggregate carrying value of the group over the aggregate fair value. The loss is allocated to each asset within the group based on their relative carrying values, with no asset reduced below its fair value.

During 2009, a long-lived asset held with a carrying amount of $4,841 was written down to its fair value of $1,297, resulting in a loss of $3,544, which was included in earnings. During 2010, the Company sold this long-lived asset for its net realizable value of approximately $1,297. In addition, the Company sold a vacated facility during 2010 and received net proceeds of $785 and recorded a net gain on the sale of $682. There were no long-lived asset impairment charges in 2011.

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Other Assets

12 Months Ended

Dec. 31, 2011

Other Assets [Abstract]

Other Assets

11)

Other Assets


	Years Ended December 31,
	2011		2010
Other Current Assets:
Income tax receivable	$	12,005	$	—
Prepaid income taxes		8,540		6,579
Other		13,693		5,998

Total other current assets	$	34,238	$	12,577

Other Assets:
Deferred tax assets, net	$	10,274	$	15,076
Other		1,992		3,703

Total other assets	$	12,266	$	18,779

Other Liabilities

12 Months Ended

Dec. 31, 2011

Other Liabilities [Abstract]

Other Liabilities

12)

Other Liabilities


	Years Ended December 31,
	2011		2010
Other Current Liabilities:
Product warranties	$	8,315	$	9,865
Deferred revenue		11,553		4,970
Non-income taxes		8,319		5,715
Other		12,137		17,418

Total other current liabilities	$	40,324	$	37,968

Other Liabilities:
Long-term income tax payable	$	16,084	$	13,688
Accrued compensation		15,174		11,064
Other		953		936

Total other liabilities	$	32,211	$	25,688

Product Warranties

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies/Product Warranties [Abstract]

Product Warranties

13)

Product Warranties

The Company provides for the estimated costs to fulfill customer warranty obligations upon the recognition of the related revenue. While the Company engages in extensive product quality programs and processes, including actively monitoring and evaluating the quality of its component suppliers, the Company’s warranty obligation is affected by shipment volume, product failure rates, utilization levels, material usage and supplier warranties on parts delivered to the Company. Should actual product failure rates, utilization levels, material usage, or supplier warranties on parts differ from the Company’s estimates, revisions to the estimated warranty liability would be required. The product warranty liability is included in other current liabilities in the consolidated balance sheets.

Product warranty activities were as follows:


	Years Ended December 31,
	2011			2010
Beginning balance	$	9,865		$	6,560
Provisions for product warranties		5,766			9,518
Direct charges to warranty liability		(7,316	)		(6,213	)

Ending balance	$	8,315		$	9,865

Restructuring

12 Months Ended

Dec. 31, 2011

Restructuring [Abstract]

Restructuring

14)

Restructuring

In the first quarter of 2009, the Company initiated a restructuring plan due to the global financial crisis and its impact on the Company’s semiconductor equipment OEM customers and the other markets it serves. The plan included a reduction in the Company’s worldwide headcount of approximately 630 people, which represented approximately 24% of its global workforce.

The Company recorded restructuring charges of $5,812 during 2009. For the twelve months ended December 31, 2009, restructuring charges of $296 were classified in discontinued operations in the consolidated statement of operations. The restructuring charges were primarily for severance and other charges associated with the reductions in workforce. The restructuring plan was completed in the first quarter of 2010.

- Definition

The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled.

+ References + Details

Debt

12 Months Ended

Dec. 31, 2011

Debt [Abstract]

Debt

15)

Debt

Credit Agreements and Short-Term Borrowings

The Company’s Japanese subsidiary has lines of credit and short-term borrowing arrangements with two financial institutions which provide for aggregate borrowings as of December 31, 2011 of up to an equivalent of $32,200 U.S. dollars, which generally expire and are renewed at three month intervals. At December 31, 2011, total borrowings outstanding under these arrangements were $1,932 at an average interest rate of 0.65%. There were no borrowings outstanding under these arrangements at December 31, 2010.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References + Details

Income Taxes

12 Months Ended

Dec. 31, 2011

Income Taxes [Abstract]

Income Taxes

16)

Income Taxes

A reconciliation of the Company’s effective tax rate to the U.S. federal statutory rate follows:


	Years Ended December 31,
	2011			2010			2009
U.S. Federal income tax statutory rate		35.0	%		35.0	%		(35.0	)%
Federal and state tax credits		(0.7	)		(1.1	)		(2.2	)
State income taxes, net of federal benefit		1.1			1.0			(0.6	)
Effect of foreign operations taxed at various rates		(4.1	)		(2.4	)		(2.2	)
Qualified production activity tax benefit		(1.1	)		(0.8	)		(0.6	)
Non-deductible goodwill		—			—			27.2
Deferred tax asset valuation allowance		0.6			(0.1	)		0.3
Other		(0.5	)		0.7			0.9

		30.3	%		32.3	%		(12.2	)%

The components of income (loss) from continuing operations before income taxes and the related provision (benefit) for income taxes consist of the following:


	Years Ended December 31,
	2011			2010		2009
Income (loss) from continuing operations before income taxes:
United States	$	108,474		$	110,779	$	(193,341	)
Foreign		77,578			85,645		23,321

	$	186,052		$	196,424	$	(170,020	)


Current taxes (benefit):
United States Federal	$	25,824		$	27,789	$	(24,606	)
State		2,602			3,323		(175	)
Foreign		20,346			22,296		7,265

		48,772			53,408		(17,516	)

Deferred taxes (benefit):
United States Federal		7,795			10,021		(394	)
State and Foreign		(246	)		76		(2,749	)

		7,549			10,097		(3,143	)

Provision (benefit) for income taxes	$	56,321		$	63,505	$	(20,659	)

The significant components of the deferred tax assets and deferred tax liabilities are as follows:


	Years Ended December 31,
	2011			2010
Deferred tax assets:
Loss carryforwards and credits	$	28,053		$	27,604
Inventory and warranty reserves		8,789			17,116
Accounts receivable and other accruals		6,875			2,794
Stock-based compensation		4,610			5,692
Executive supplemental retirement benefits		4,826			4,584
Other		1,245			3,824

Total deferred tax assets	$	54,398		$	61,614


Deferred tax liabilities:
Acquired intangible assets		(3,330	)		(3,927	)
Depreciation and amortization		(3,679	)		(1,621	)
Other		(22	)		(1,948	)

Total deferred tax liabilities		(7,031	)		(7,496	)

Valuation allowance		(26,475	)		(25,267	)

Net deferred tax assets	$	20,892		$	28,851

At December 31, 2011, the Company had gross Massachusetts research credit carryforwards of $7,739. These credit carryforwards will expire at various dates through 2026. In addition, at December 31, 2011, the Company had U.S. federal capital loss carryforwards of $2,110, and $59,275 that will expire in 2013 and 2015, respectively.

During 2010, the Company sold the assets of its YDI business that resulted in the expiration of business credit carryforwards of $810 and U.S. federal net operating losses of $1,936. U.S. federal net operating losses available to the Company in the amount of $3,553 were utilized in 2011.

Although the Company believes that its tax positions are consistent with applicable U.S. federal, state and international laws, certain tax reserves are maintained at December 31, 2011 should these positions be challenged by the applicable tax authority and additional tax assessed on audit.

A reconciliation of the beginning and ending amount of gross unrecognized tax benefits is as follows:


	Years Ended December 31,
	2011			2010			2009
Balance at beginning of year	$	21,314		$	9,085		$	14,678
Decreases for prior years		(3	)		(6	)		(41	)
Increases for the current year		15,988			12,839			1,693
Reductions related to settlements with taxing authorities		(2,148	)		—			(7,245	)
Reductions related to expiration of statute of limitations		—			(604	)		—

Balance at end of year	$	35,151		$	21,314		$	9,085

At December 31, 2011, the total amount of gross unrecognized tax benefits, which excludes interest and penalties, was approximately $35,151. The net increase from December 31, 2010 was primarily attributable to a current year increase in reserves for existing uncertain tax positions, partially offset by a reduction due to the effective settlement of a foreign tax audit. As of December 31, 2011, if these benefits were recognized in a future period, the timing of which is not estimable, the net unrecognized tax benefit of $15,354, excluding interest and penalties, would impact the Company’s effective tax rate.

The Company accrues interest expense and, if applicable, penalties, for any uncertain tax positions. Interest and penalties are classified as a component of income tax expense. At December 31, 2011, 2010 and 2009 we had accrued interest on unrecognized tax benefits of approximately $973, $986 and $651, respectively.

Over the next 12 months it is reasonably possible that the Company may recognize $2,800 to $3,400 of previously unrecognized tax benefits related to various U.S. federal, state and foreign tax positions as a result of the conclusion of various audits and the expiration of the statute of limitations. The Company is subject to examination by federal, state and foreign tax authorities. The Company’s U.S. federal tax filings are open for examination for tax years 2007 through present. The statute of limitations in the Company’s other tax jurisdictions remains open between fiscal year 2004 through present.

On a quarterly basis, the Company evaluates both positive and negative evidence that affects the realizability of net deferred tax assets and assesses the need for a valuation allowance. The future benefit to be derived from its deferred tax assets is dependent upon its ability to generate sufficient future taxable income to realize the assets. During 2011, the Company increased its valuation allowance by $1,208 primarily related to capital losses incurred from our foreign affiliates because the Company has determined it is more likely than not that the deferred tax assets related to these attributes will not be realized. In 2010, the Company increased its valuation allowance by $20,066, primarily related to capital losses incurred from the Company’s discontinued business operations. In 2011, the Company recorded a net benefit to income tax expense of $2,148, excluding interest and penalties, due to discrete reserve releases primarily related to the effective settlement of a German tax audit for years 2001 through 2005. In 2010, the Company did not record a benefit to income tax expense. In 2009, the Company recorded a net benefit to income tax expense of $5,725, excluding interest and penalties, due to discrete reserve releases primarily related to the closure of the 2005 and 2006 U.S. federal tax audits.

Through December 31, 2011, the Company has not provided deferred income taxes on the undistributed earnings of its foreign subsidiaries because such earnings were intended to be permanently reinvested outside the U.S. Determination of the potential deferred income tax liability on these undistributed earnings is not practicable because such liability, if any, is dependent on circumstances existing if and when remittance occurs. At December 31, 2011, the Company had $382,415 of undistributed earnings in its foreign subsidiaries.

During 2006, the Company received a notification letter from the Israeli Ministry of Industry Trade and Labor (“MITL”) indicating that its Israeli operations were in compliance with requirements relating to the tax holiday granted to its manufacturing operations in Israel in 2001. This tax holiday expired at December 31, 2011 and was subject to meeting continued investment, employment and other requirements under the guidelines of the MITL. This tax holiday resulted in income tax savings of approximately $1,000, $2,700 and $300 for the years 2011, 2010 and 2009, respectively.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 136, 172
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 43, 44, 45, 46, 47, 48, 49
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Paragraph 9
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
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-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319

+ Details

Discontinued Operations

12 Months Ended

Dec. 31, 2011

Discontinued Operations [Abstract]

Discontinued Operations

17)

Discontinued Operations

During 2010, the Company executed a plan to divest two product lines, as their growth potential no longer met the Company’s long-term strategic objectives. The Company completed the sale of Ion on May 17, 2010 for $15,092 of net cash proceeds after expenses and recorded a pre-tax gain on the sale of $4,208. The Company completed the sale of the assets of its YDI business on August 11, 2010 for $490 of net cash proceeds after expenses and recorded a pre-tax gain on the sale of $224.

The two product lines have been accounted for as discontinued operations. Accordingly, their results of operations have been reclassified to discontinued operations in the consolidated statements of operations for all periods presented. The assets and liabilities of these discontinued businesses have not been reclassified or segregated in the consolidated balance sheets or consolidated statements of cash flows due to their immaterial amounts. Net revenues and income (loss) from discontinued operations are below:


	Years Ended December 31,
	2011		2010			2009
Net revenues	$	—	$	11,974		$	18,713
Income (loss) from discontinued operations before income taxes		—		2,320			(68,837	)
Gain from disposal of discontinued operations before income taxes		—		4,432			—
Income tax (benefit)		—		(2,916	)		(5,539	)

Income (loss) from discontinued operations	$	—	$	9,668		$	(63,298	)

For 2009, the loss from discontinued operations before income taxes includes $65,539 of goodwill and intangible asset impairment charges. These charges were a result of the interim impairment assessment performed on April 30, 2009.

- Definition

The entire disclosure for the facts and circumstances leading to the completed or expected disposal, manner and timing of disposal, the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the segment in which the disposal group was reported, and the classification (whether sold or classified as held for sale) and carrying value of the assets and liabilities comprising the disposal group. Includes all disposal groups, including those classified as components of the entity (discontinued operations).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 43-48
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 205
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-Section 50
-Paragraph 1
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
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-Section 45
-Paragraph 5
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1436-107760

+ Details

Stockholders' Equity

12 Months Ended

Dec. 31, 2011

Stockholders' Equity [Abstract]

Stockholder's Equity

18)

Stockholders’ Equity

Stock Repurchase

On July 25, 2011, the Company’s Board of Directors approved a share repurchase program for the repurchase of up to an aggregate of $200,000 of its outstanding common stock from time to time in open market purchases, privately negotiated transactions or through other appropriate means. The timing and quantity of any shares repurchased will depend upon a variety of factors, including business conditions, stock market conditions and business development activities, including but not limited to merger and acquisition opportunities. These repurchases may be commenced, suspended or discontinued at any time without prior notice.

During 2011, the Company repurchased approximately 86,000 shares of its common stock for $2,007 at an average price of $23.40 per share.

Dividends

Holders of the Company’s common stock are entitled to receive dividends when they are declared by the Company’s Board of Directors. During 2011, the Board of Directors authorized four quarterly dividends of $0.15 per share, which totaled $31,373 or $0.60 per share. Future dividend declarations, if any, as well as the record and payment dates for such dividends, are subject to the final determination of the Company’s Board of Directors.

On February 13, 2012, the Company’s Board of Directors declared a quarterly cash dividend of $0.15 per share to be paid on March 16, 2012 to shareholders of record as of March 1, 2012.

Employee Stock Purchase Plans

The Company’s Third Amended and Restated 1999 Employee Stock Purchase Plan (the “Purchase Plan”) authorizes the issuance of up to an aggregate of 1,950,000 shares of Common Stock to participating employees. Offerings under the Purchase Plan commence on June 1 and December 1 and terminate, respectively, on November 30 and May 31. Under the Purchase Plan, eligible employees may purchase shares of Common Stock through payroll deductions of up to 10% of their compensation. The price at which an employee’s option is exercised is the lower of (1) 85% of the closing price of the Common Stock on the NASDAQ Global Select Market on the day that each offering commences or (2) 85% of the closing price on the day that each offering terminates. During 2011 and 2010, the Company issued 137,410 and 67,132 shares, respectively, of Common Stock to employees who participated in the Purchase Plan at an exercise price of $18.26 and $21.62 per share in 2011 and $16.19 per share in 2010. As of December 31, 2011 there were 492,721 shares reserved for future issuance under the Purchase Plan. During 2009, the Company suspended the June 1 and December 1 Purchase Plan cycles and as a result, no shares were issued for these cycles. The Company reinstated the Domestic Purchase Plan on June 1, 2010.

The Company’s Second Amended and Restated International Employee Stock Purchase Plan (the “Foreign Purchase Plan”) authorizes the issuance of up to an aggregate of 400,000 shares of Common Stock to participating employees. Offerings under the Foreign Purchase Plan commence on June 1 and December 1 and terminate, respectively, on November 30 and May 31. Under the Foreign Purchase Plan, eligible employees may purchase shares of Common Stock through payroll deductions of up to 10% of their compensation. The price at which an employee’s option is exercised is the lower of (1) 85% of the closing price of the Common Stock on the NASDAQ Global Select Market on the day that each offering commences or (2) 85% of the closing price on the day that each offering terminates. During 2011 and 2010, the Company issued 29,969 and 15,063 shares, respectively, of Common Stock to employees who participated in the Foreign Purchase Plan at an exercise price of $18.26 and $21.62 per share in 2011 and $16.19 per share in 2010. As of December 31, 2011 there were 126,424 shares reserved for future issuance under the Foreign Purchase Plan. During 2009, the Company suspended the June 1 and December 1 Purchase Plan cycles and as a result, no shares were issued for these cycles. The Company reinstated the Foreign Purchase Plan on June 1, 2010.

Equity Incentive Plans

The Company has granted options to employees under the 2004 Stock Incentive Plan (the “2004 Plan”) and under the Second Restated 1995 Stock Incentive Plan (the “1995 Plan”), and to directors under the 1997 Director Stock Plan (the “1997 Director Plan”) (collectively, the “Plans”). The Plans are administered by the Compensation Committee of the Company’s board of directors.

The Company’s equity incentive Plans are intended to attract and retain employees and to provide an incentive for them to assist the Company to achieve long-range performance goals and to enable them to participate in the long-term growth of the Company. Employees may be granted RSUs, options to purchase shares of the Company’s stock and other equity incentives under the Plans.

The Company’s 2004 Plan was adopted by the board of directors on March 4, 2004 and approved by the stockholders on May 13, 2004. As of December 31, 2011, there were 15,000,000 shares authorized for issuance under the 2004 Plan, which amount shall increase each year by an amount equal to 5% of the total outstanding shares of the Company’s common stock outstanding on January 1 of such year, provided that the maximum aggregate number of shares of common stock which may be issued under the 2004 Plan is 15,000,000 shares (subject to adjustment for certain changes in MKS’ capitalization). The Company may grant options, RSUs, stock appreciation rights and other stock-based awards to employees, officers, directors, consultants and advisors under the 2004 Plan. As of December 31, 2011, there were 11,778,755 shares available for future grants under the 2004 Plan.

The Company’s 1995 Plan expired in November 2005 and no further awards may be granted under the 1995 Plan, although there are still outstanding options which may be exercised under this plan.

The Company’s 1997 Director Plan expired in February 2007 and no further awards may be granted under the 1997 Director Plan, although there are still outstanding options which may be exercised under this plan.

Stock options were granted at an exercise price equal to 100% of the fair value of the Company’s common stock at the date of grant. Generally, stock options granted to employees under the Plans in 2001 and after, vested 25% after one year and 6.25% per quarter thereafter, and expire 10 years after the grant date. Generally, stock options granted under the Plans prior to 2001 vested 20% after one year and 5% per quarter thereafter, and expired 10 years after the grant date. Options granted to directors generally vested at the earliest of (1) one day prior to the next annual meeting, (2) 13 months from date of grant, or (3) the effective date of an acquisition. All stock options are fully vested as of December 31, 2011. RSUs granted in 2011 generally vest 33.3% per year after the date of grant. RSUs granted in 2010 and prior, generally vest three years from the date of grant. RSUs granted to employees who are at least 60 years old and have a combined years of age plus years of service (as defined) equal to 70 or more, are expensed immediately. RSUs granted to directors generally vest at the earliest of (1) one day prior to the next annual meeting, (2) 13 months from date of grant, or (3) the effective date of an acquisition. Certain equity incentive awards involve RSUs that are subject to performance conditions (“performance shares”) under the Company’s stock incentive plans. Such performance shares are available, subject to time-based vesting conditions if, and to the extent that, financial or operational performance criteria for the applicable period are achieved. Accordingly, the number of performance shares earned will vary based on the level of achievement of financial or operational performance objectives for the applicable period.

The following table presents the activity for RSUs under the Plans:


	Years Ended December 31,
	2011					2010					2009
	Non-vested RSUs			Weighted Average Grant Date Fair Value		Non-vested RSUs			Weighted Average Grant Date Fair Value		Non-vested RSUs			Weighted Average Grant Date Fair Value
Non-vested RSUs — beginning of period		1,327,306		$	18.34		1,581,883		$	19.77		1,824,990		$	21.87
Granted		397,492		$	30.27		555,995		$	19.63		682,156		$	15.27
Vested		(569,891	)	$	20.42		(706,224	)	$	20.65		(666,247	)	$	21.91
Forfeited or expired		(39,902	)	$	18.36		(104,348	)	$	18.32		(259,016	)	$	17.25

Non-vested RSUs — end of period		1,115,005		$	21.50		1,327,306		$	18.34		1,581,883		$	19.77

The following table presents the activity for options under the Plans:


	Years Ended December 31,
	2011					2010					2009
	Options			Weighted Average Exercise Price		Options			Weighted Average Exercise Price		Options			Weighted Average Exercise Price
Outstanding — beginning of period		1,793,214		$	22.38		2,514,822		$	21.67		4,558,838		$	23.44
Exercised		(1,351,684	)	$	22.46		(568,464	)	$	16.49		(134,118	)	$	14.54
Forfeited or expired		(20,818	)	$	22.66		(153,144	)	$	32.51		(1,909,898	)	$	26.18

Outstanding — end of period		420,712		$	21.97		1,793,214		$	22.38		2,514,822		$	21.67

Exercisable at end of period		420,712		$	21.97		1,793,214		$	22.38		2,514,197		$	21.67

The following table summarizes information with respect to options outstanding and exercisable under the Plans at December 31, 2011:


	Options Outstanding and Exercisable
	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (In Years)		Aggregate Intrinsic Value (In Thousands)
$13.54 – $18.44		205,884	$	15.91		2.18		2,451
$20.07 – $27.77		139,989	$	25.18		2.18		370
$29.93 – $38.30		74,839	$	32.63		1.33		—

		420,712						2,821

The weighted average remaining contractual life of options exercisable was 2 years at December 31, 2011.

The aggregate intrinsic value in the table above represents the total pre-tax intrinsic value, based on the Company’s closing stock price of $27.82 as of December 31, 2011, which would have been received by the option holders had all option holders exercised their options as of that date. The total number of in-the-money options exercisable as of December 31, 2011 was 345,873.

The total cash received from employees as a result of employee stock option exercises during the years 2011 and 2010 was approximately $30,362 and $9,375, respectively. In connection with these exercises, the tax benefits realized by the Company for the years 2011 and 2010 were approximately $5,019 and $1,253, respectively.

The Company settles employee stock option exercises and restricted stock vesting with newly issued common shares.

Accumulated Other Comprehensive Income

The balance of accumulated other comprehensive income (loss) was comprised of the following:


	Cumulative Translation Adjustments		Financial Instruments Designated as Cash Flow Hedges			Unrealized Gain (Loss) on Investments			Accumulated Other Comprehensive Income (Loss)
Balance at December 31, 2009	$	10,101	$	570		$	(31	)	$	10,640
Foreign currency translation adjustment, net of tax of $0		3,710		—			—			3,710
Changes in value of financial instruments designated as cash flow hedges, net of tax benefit of $1,576		—		(2,600	)		—			(2,600	)
Change in unrealized gain on investments, net of tax of $17		—		—			28			28

Balance at December 31, 2010	$	13,811	$	(2,030	)	$	(3	)	$	11,778
Foreign currency translation adjustment, net of tax of $0		129		—			—			129
Changes in value of financial instruments designated as cash flow hedges, net of tax of $937		—		1,570			—			1,570
Change in unrealized gain on investments, net of tax of $79		—		—			133			133

Balance at December 31, 2011	$	13,940	$	(460	)	$	130		$	13,610

- Definition

The entire disclosure for shareholders' equity, comprised of portions attributable to the parent entity and noncontrolling interest, if any, including other comprehensive income (as applicable). Including, but not limited to: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms, and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables, effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 4
-Section 08
-Paragraph d

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Chapter 1
-Section B
-Paragraph 7, 11A
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 129
-Paragraph 2, 3, 4, 5, 6, 7, 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Article 4

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30, 31
-Article 5

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section E

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section C

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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-Paragraph 4
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Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644

Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644

Reference 17: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(d),(e))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 18: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

Reference 19: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
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-Paragraph 2
-Subparagraph (SAB TOPIC 4.E)
-URI http://asc.fasb.org/extlink&oid=6228006&loc=d3e74512-122707

Reference 21: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Preferred Stock
-URI http://asc.fasb.org/extlink&oid=6521494

Reference 22: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29-31)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 23: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB TOPIC 4.C)
-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187143-122770

+ Details

Stock-Based Compensation

12 Months Ended

Dec. 31, 2011

Stock-Based Compensation [Abstract]

Stock-Based Compensation

19)

Stock-Based Compensation

The Company recognized the full impact of its share-based payment plans in the consolidated statements of operations for the years 2011, 2010 and 2009. As of December 31, 2011 and 2010, the Company capitalized $471 of such cost on its consolidated balance sheet. The following table reflects the effect of recording stock-based compensation for the years 2011, 2010 and 2009:


	Years Ended December 31,
	2011			2010			2009
Stock-based compensation expense by type of award:
Employee stock options	$	—		$	—		$	158
Restricted stock		10,126			10,026			8,218
Employee stock purchase plan		1,099			578			469

Total stock-based compensation		11,225			10,604			8,845
Tax effect on stock-based compensation		(5,019	)		(1,253	)		1,258

Net effect on net income or net loss	$	6,206		$	9,351		$	10,103

Effect on net earnings or loss per share:
Basic	$	0.12		$	0.19		$	0.20

Diluted	$	0.12		$	0.18		$	0.20

The pre-tax effect within the consolidated statements of operations of recording stock-based compensation for the years 2011, 2010 and 2009 was as follows:


	Years Ended December 31,
	2011		2010		2009
Cost of sales	$	1,511	$	1,452	$	1,298
Research and development expense		2,197		2,391		2,026
Selling, general and administrative expense		7,517		6,761		5,521

Total pre-tax stock-based compensation expense	$	11,225	$	10,604	$	8,845

Valuation Assumptions

The Company determines the fair value of restricted stock based on the number of shares granted and the closing market price of the Company’s common stock on the date of the award, and estimates the fair value of stock options and employee stock purchase rights using the Black-Scholes valuation model. Such values are recognized as expense on a straight-line basis over the requisite service periods, net of estimated forfeitures except for retirement eligible employees in which the Company expenses the fair value of the grant in the period the grant is issued. The estimation of stock-based awards that will ultimately vest requires significant judgment. The Company considers many factors when estimating expected forfeitures, including types of awards and historical experience. Actual results, and future changes in estimates, may differ substantially from the Company’s current estimates.

There were no options granted during 2011, 2010 and 2009. The total intrinsic value of options exercised during 2011, 2010 and 2009 was approximately $9,458, $3,518 and $327, respectively.

The weighted average fair value per share of employee stock purchase rights granted in 2011, 2010 and 2009 was $5.87, $5.48 and $4.44, respectively. The fair value of the employees’ purchase rights was estimated using the Black-Scholes option-pricing model with the following weighted average assumptions:


	Years Ended December 31,
	2011			2010			2009
Employee stock purchase rights:
Expected life (years)		0.5			0.5			0.5
Risk-free interest rate		0.2	%		0.2	%		0.5	%
Expected volatility		31.9	%		48.7	%		68.0	%
Expected annual dividends per share	$	0.60		$	—		$	—

Expected volatilities for 2011, 2010 and 2009 are based on a combination of implied and historical volatilities of the Company’s common stock; the expected life represents the weighted average period of time that options granted are expected to be outstanding giving consideration to vesting schedules and the Company’s historical exercise patterns; and the risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for periods corresponding with the expected life of the option.

The total intrinsic value of options exercised and the total fair value of shares vested during 2011, 2010 and 2009 was approximately $27,199, $16,846 and $10,188, respectively. As of December 31, 2011, the unrecognized compensation cost related to restricted stock was approximately $11,418, and will be recognized over an estimated weighted average amortization period of 1.7 years.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph 64, 65, A240
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 93-6
-Paragraph 53
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 50
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929

+ Details

Employee Benefit Plans

12 Months Ended

Dec. 31, 2011

Employee Benefit Plans [Abstract]

Employee Benefit Plans

20)

Employee Benefit Plans

The Company has a 401(k) profit-sharing plan for U.S. employees meeting certain requirements in which eligible employees may contribute between 1% and 50% of their annual compensation to this plan, and, with respect to employees who are age 50 and older, certain specified additional amounts, limited by an annual maximum amount determined by the Internal Revenue Service. The Company, at its discretion, may provide a matching contribution of 50% of each participant’s contributions up to 6% of eligible salary. At the discretion of the board of directors, the Company may also make additional contributions for the benefit of all eligible employees. The Company’s contributions were $2,276, $1,472 and $929, for 2011, 2010 and 2009, respectively. The Company temporarily suspended the employer match portion of the 401(k) profit-sharing plan between April 2009 and March 2010 as a result of cost control measures.

The Company maintains a bonus plan which provides cash awards to key employees, at the discretion of the compensation committee of the board of directors, based upon operating results and employee performance. The bonus expense was $7,559, $18,972 and $881 in 2011, 2010 and 2009, respectively.

The Company provides supplemental retirement benefits for certain of its officers and executive officers. The total cost of these benefits was $3,931, $3,428 and $3,138 for 2011, 2010 and 2009, respectively. The accumulated benefit obligation was $12,870 and $12,225 at December 31, 2011 and 2010, respectively and was included in other long-term liabilities.

Net Income (Loss) Per Share

12 Months Ended

Dec. 31, 2011

Net Income (Loss) Per Share [Abstract]

Net Income (Loss) Per Share

21)

Net Income (Loss) Per Share

Basic earnings per share (“EPS”), is computed by dividing income available to common stockholders by the weighted-average number of common shares outstanding during the period. The computation of diluted EPS is similar to the computation of basic EPS except that the denominator is increased to include the number of additional common shares that would have been outstanding (using the treasury stock method), if securities containing potentially dilutive common shares (stock options and restricted stock units) had been converted to such common shares, and if such assumed conversion is dilutive.

The following is a reconciliation of basic to diluted net income (loss) per share:


	Years Ended December 31,
	2011		2010		2009
Numerator:
Income (loss) from continuing operations	$	129,731	$	132,919	$	(149,361	)
Income (loss) from discontinued operations, net of tax		—		9,668		(63,298	)

Net income (loss)	$	129,731	$	142,587	$	(212,659	)

Denominator:
Shares used in net income (loss) per common share — basic		52,169,000		50,077,000		49,318,000
Effect of dilutive securities:
Stock options, restricted stock and employee stock purchase plan		678,000		850,000		—

Shares used in net income (loss) per common share — diluted		52,847,000		50,927,000		49,318,000

Basic income (loss) per common share:
Continuing operations	$	2.49	$	2.66	$	(3.03	)
Discontinued operations		—		0.19		(1.28	)

Net income (loss)	$	2.49	$	2.85	$	(4.31	)

Diluted income (loss) per common share:
Continuing operations	$	2.45	$	2.61	$	(3.03	)
Discontinued operations		—		0.19		(1.28	)

Net income (loss)	$	2.45	$	2.80	$	(4.31	)

As of December 31, 2011, 2010 and 2009, stock options and restricted stock units relating to an aggregate of approximately 1,536,000, 3,121,000 and 4,097,000 shares, respectively, were outstanding. In 2011 and 2010, the potential dilutive effect of 259,000 and 1,256,000 weighted average shares, respectively, of stock options were excluded from the computation of diluted weighted-average shares outstanding as the shares would have an anti-dilutive effect on EPS. In 2009, all potentially dilutive common shares were excluded from the dilutive computation as the effect of including such securities in the computation would be anti-dilutive due to the Company’s net loss for the year.

Geographic, Product and Significant Customer Information

12 Months Ended

Dec. 31, 2011

Geographic, Product and Significant Customer Information [Abstract]

Geographic, Product and Significant Customer Information

22)

Geographic, Product and Significant Customer Information

The Company operates in one segment for the development, manufacturing, sales and servicing of products that measure, control, power and monitor critical parameters of advanced manufacturing processes. The Company’s chief operating decision-maker reviews consolidated operating results to make decisions about allocating resources and assessing performance for the entire Company.

Information about the Company’s operations in different geographic regions is presented in the tables below. Net sales to unaffiliated customers are based on the location in which the sale originated. Transfers between geographic areas are at negotiated transfer prices and have been eliminated from consolidated net sales.


	Years Ended December 31,
	2011		2010		2009
Geographic net sales
United States	$	391,122	$	484,139	$	212,639
Japan		106,003		118,537		47,704
Europe		115,362		96,545		63,876
Asia		210,030		153,893		68,474

	$	822,517	$	853,114	$	392,693


	Years Ended December 31,
	2011		2010
Long — lived assets(1)
United States	$	56,760	$	54,840
Japan		3,908		4,273
Europe		5,437		4,970
Asia		8,374		8,597

	$	74,479	$	72,680

(1)	Long-lived assets include property, plant and equipment, net and certain other assets.

The Company groups its products into three product groups based upon the similarity of the product function, type of product and manufacturing processes. Net sales for these product groups are as follows:


	Years Ended December 31,
	2011		2010		2009
Instruments and Control Systems	$	413,584	$	430,468	$	205,877
Power and Reactive Gas Products		327,151		343,827		148,191
Vacuum and Other Products		81,782		78,819		38,625

	$	822,517	$	853,114	$	392,693

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 131
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8981-108599

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-Paragraph 35
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9054-108599

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9031-108599

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8924-108599

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8538-108599

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-Paragraph 29
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8864-108599

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8971-108599

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8844-108599

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8380-108599

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8595-108599

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8933-108599

+ Details

Commitments and Contingencies

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies/Product Warranties [Abstract]

Commitments and Contingencies

23)

Commitments and Contingencies

Brooks Instrument, LLC filed two lawsuits, in one case along with their affiliate BI Products, LLC (collectively with Brooks Instrument, LLC, “Brooks”), against the Company in the United States District Court for the Eastern District of Texas, on April 29, 2010. Brooks also filed one lawsuit against the Company in the United States District Court for the District of Massachusetts on April 29, 2010. These suits were related to the Company’s digital mass flow controllers and digital pressure sensors. Brooks sought injunctive relief and damages for alleged patent infringement, breach of contract and trade secret violations. None of the lawsuits specified a specific amount of damages. The Company responded to the allegations to deny any wrongdoing. In addition, the Company filed counterclaims against Brooks in the courts where they initially brought suit against the Company, seeking injunctive relief and damages for alleged patent infringement by Brooks, relating to their pressure transient insensitive mass flow controllers. On February 22, 2011, the parties entered into a settlement agreement, resolving all the issues in the cases, and on February 23, 2011, the parties filed stipulated dismissals with the appropriate courts.

The Company is subject to various other legal proceedings and claims, which have arisen in the ordinary course of business. In the opinion of management, the ultimate disposition of these matters will not have a material adverse effect on the Company’s results of operations, financial condition or cash flows.

The Company leases certain of its facilities and machinery and equipment under operating leases expiring in various years through 2022. Generally, the facility leases require the Company to pay maintenance, insurance and real estate taxes. Rental expense under operating leases totaled $7,747, $8,304 and $8,974 for 2011, 2010 and 2009, respectively.

Minimum lease payments under operating leases are as follows:


	Operating Leases
Year ending December 31,
2012	$	7,619
2013		5,817
2014		4,741
2015		3,518
2016		3,039
Thereafter		3,989

Total minimum lease payments	$	28,723

As of December 31, 2011, the Company has entered into purchase commitments for certain inventory components and other equipment and services used in its normal operations. The majority of these purchase commitments covered by these arrangements are for periods of less than one year and aggregate to approximately $141,490.

To the extent permitted by Massachusetts law, the Company’s Restated Articles of Organization, as amended, require the Company to indemnify any of its current or former officers or directors or any person who has served or is serving in any capacity with respect to any of the Company’s employee benefit plans. The Company believes that the estimated exposure for these indemnification obligations is currently not material. Accordingly, the Company has no material liabilities recorded for these requirements as of December 31, 2011.

The Company also enters into agreements in the ordinary course of business which include indemnification provisions. Pursuant to these agreements, the Company indemnifies, holds harmless and agrees to reimburse the indemnified party, generally its customers, for losses suffered or incurred by the indemnified party in connection with certain patent or other intellectual property infringement claims, and, in some instances, other claims, by any third party with respect to the Company’s products. The term of these indemnification obligations is generally perpetual after execution of the agreement. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements is, in some instances, not contractually limited. The Company has never incurred costs to defend lawsuits or settle claims related to these indemnification obligations. As a result, the Company believes the estimated fair value of these obligations is minimal. Accordingly, the Company has no liabilities recorded for these obligations as of December 31, 2011.

As part of past acquisitions and divestitures of businesses or assets, the Company has provided a variety of indemnifications to the sellers and purchasers for certain events or occurrences that took place prior to the date of the acquisition or divestiture. Typically certain of the indemnifications expire after a defined period of time following the transaction, but certain indemnifications may survive indefinitely. The maximum potential amount of future payments the Company could be required to make for such obligations is undeterminable at this time. Other than obligations recorded as liabilities at the time of the acquisitions, historically the Company has not made significant payments for these indemnifications. Accordingly, no material liabilities have been recorded for these obligations.

In conjunction with certain asset sales, the Company may provide routine indemnifications whose terms range in duration and often are not explicitly defined. Where appropriate, an obligation for such indemnification is recorded as a liability. Because the amounts of liability under these types of indemnifications are not explicitly stated, the overall maximum amount of the obligation under such indemnifications cannot be reasonably estimated. Other than obligations recorded as liabilities at the time of the asset sale, historically the Company has not made significant payments for these indemnifications.

- Definition

The entire disclosure for commitments and contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 14
-Paragraph 3
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.25)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14435-108349

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25287-109308

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6449706&loc=d3e16207-108621

+ Details

Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2011

Valuation and Qualifying Accounts [Abstract]

VALUATION AND QUALIFYING ACCOUNTS

MKS INSTRUMENTS, INC.

SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS


			Additions
Description	Balance at Beginning of Year		Charged to Costs and Expenses		Charged to Other Accounts		Deductions & Write-offs		Balance at End of Year
	(Dollars in thousands)
Accounts receivable allowance:
Years ended December 31,
2011	$	2,557	$	3,390	$	—	$	3,431	$	2,516
2010	$	2,415	$	3,637	$	—	$	3,495	$	2,557
2009	$	2,148	$	3,655	$	—	$	3,388	$	2,415


			Additions
Description	Balance at Beginning of Year		Charged to Costs and Expenses		Charged to Other Accounts		Deductions		Balance at End of Year
	(Dollars in thousands)
Valuation allowance on deferred tax asset:
Years ended December 31,
2011	$	25,267	$	—	$	1,208	$	—	$	26,475
2010	$	5,201	$	—	$	20,833	$	767	$	25,267
2009	$	4,653	$	—	$	548	$	—	$	5,201

Summary of Significant Accounting Policies (Policies)	12 Months Ended
Summary of Significant Accounting Policies (Policies)	Dec. 31, 2011
Summary of Significant Accounting Policies [Abstract]
Revenue Recognition and Accounts Receivable Allowances	Revenue Recognition and Accounts Receivable Allowances Revenue from product sales is recorded upon transfer of title and risk of loss to the customer provided that there is evidence of an arrangement, the sales price is fixed or determinable, and collection of the related receivable is reasonably assured. In most transactions, the Company has no obligations to customers after the date products are shipped other than pursuant to warranty obligations. In some instances, the Company provides installation, training, support and services to customers after the product has been shipped. For revenue arrangements with multiple deliverables, we allocate revenue to each element based upon their relative selling price using vendor-specific objective evidence (“VSOE”), or third-party evidence (“TPE”) or based upon the relative selling price using estimated prices if VSOE or TPE does not exist. We then recognize revenue on each deliverable in accordance with our policies for product and service revenue recognition. The Company provides for the estimated costs to fulfill customer warranty obligations upon the recognition of the related revenue. Shipping and handling fees, if any, billed to customers are recognized as revenue. The related shipping and handling costs are recognized in cost of sales. Accounts receivable allowances include sales returns and bad debt allowances. The Company monitors and tracks the amount of product returns and reduces revenue at the time of shipment for the estimated amount of such future returns, based on historical experience. The Company makes estimates evaluating its allowance for doubtful accounts. The Company continuously monitors collections and payments from its customers and maintains a provision for estimated credit losses based upon its historical experience and any specific customer collection issues that it has identified. Revenue Recognition and Accounts Receivable Allowances. Revenue from product sales is recorded upon transfer of title and risk of loss to the customer provided that there is evidence of an arrangement, the sales price is fixed or determinable, and collection of the related receivable is reasonably assured. In most transactions, we have no obligations to our customers after the date products are shipped other than pursuant to warranty obligations. In some instances, we provide installation, training, support and services to customers after the product has been shipped. We defer the fair value of any undelivered elements until the undelivered element is delivered. Fair value is the price charged when the element is sold separately. Shipping and handling fees billed to customers, if any, are recognized as revenue. The related shipping and handling costs are recognized in cost of sales.
Research and Development	Research and Development Research and development costs are expensed as incurred and consist mainly of compensation related expenses and project materials. The Company’s research and development efforts include numerous projects, which generally have a duration of 3 to 30 months. Acquired in-process research and development (“IPR&D”) expenses, which are capitalized at fair value as an intangible asset until the related project is completed, are then amortized over the estimated useful life of the product. Projects that are abandoned are immediately written off. In 2009 and prior years, IPR&D was expensed as incurred.
Advertising Costs	Advertising Costs Advertising costs are expensed as incurred and were immaterial in 2011, 2010 and 2009.
Stock-Based Compensation	Stock-Based Compensation The accounting for share-based compensation expense requires the measurement and recognition of compensation expense for all share-based payment awards made to employees and directors based on estimated fair values. For restricted stock units (“RSUs”), the fair value is the fair value on the date of grant. The Company has estimated the fair value of share-based options on the date of grant using the Black Scholes pricing model, which is affected by the Company’s stock price as well as assumptions regarding a number of complex and subjective variables. These variables include the Company’s expected stock price volatility over the term of the awards, expected life, risk free interest rate and expected dividends. The Company is also required to estimate forfeitures at the time of grant and revise those estimates in subsequent periods if actual forfeitures differ from those estimates. Management determined that blended volatility, a combination of historical and implied volatility, is more reflective of market conditions and a better indicator of expected volatility than historical or implied volatility alone. The assumptions used in calculating the fair value of share-based payment awards represent management’s best estimates, but these estimates involve inherent uncertainties and the application of management judgment. As a result, if factors change and the Company uses different assumptions, its stock-based compensation expense could be materially different in the future.
Net Income Per Share	Net Income Per Share Basic earnings per share is based on the weighted average number of common shares outstanding, and diluted earnings per share is based on the weighted average number of common shares outstanding and all potential dilutive common equivalent shares outstanding. The dilutive effect of options is determined under the treasury stock method using the average market price for the period. Common equivalent shares are included in the per share calculations when the effect of their inclusion would be dilutive.
Cash and Cash Equivalents and Investments	Cash and Cash Equivalents and Investments All highly liquid investments with a maturity date of three months or less at the date of purchase are considered to be cash equivalents. The appropriate classification of investments in securities is determined at the time of purchase. Debt securities that the Company does not have the intent and ability to hold to maturity are classified as “available-for-sale” and are carried at fair value. Mutual funds that are bought and held principally for the purpose of selling them in the near term are classified as “trading” and are carried at fair value. The Company reviews its investment portfolio on a monthly basis to identify and evaluate individual investments that have indications of possible impairment. The factors considered in determining whether a loss is other-than-temporary include: the length of time and extent to which fair market value has been below the cost basis, the financial condition and near-term prospects of the issuer, credit quality, and the Company’s ability to hold the investment for a period of time sufficient to allow for any anticipated recovery in fair value.
Concentrations of Credit Risk	Concentrations of Credit Risk The Company’s significant concentrations of credit risk consist principally of cash and cash equivalents, investments, forward exchange contracts and trade accounts receivable. The Company maintains cash and cash equivalents with financial institutions including some banks with which it had borrowings. The Company maintains investments primarily in U.S. Treasury and government agency securities and corporate debt securities. The Company enters into forward currency contracts with high credit-quality financial institutions in order to minimize credit risk exposure. The Company’s customers are primarily concentrated in the semiconductor industry, and a limited number of customers account for a significant portion of the Company’s revenues. The Company regularly monitors the creditworthiness of its customers and believes it has adequately provided for potential credit loss exposures. Credit is extended for all customers based primarily on financial condition and collateral is not required. The Company had one customer comprising 14%, 16% and 13% of net sales for 2011, 2010 and 2009, respectively. During the years 2011, 2010 and 2009, the Company estimated that approximately 61%, 64% and 52% of its net sales, respectively, were to semiconductor capital equipment manufacturers and semiconductor device manufacturers. There were no customers comprising 10% or more of the Company’s accounts receivable balance as of December 31, 2011.
Inventories	Inventories The Company values its inventory at the lower of cost (first-in, first-out method) or market. The Company regularly reviews inventory quantities on hand and records a provision to write-down excess and obsolete inventory to its estimated net realizable value, if less than cost, based primarily on its estimated forecast of product demand.
Property, Plant and Equipment	Property, Plant and Equipment Property, plant and equipment are stated at cost. Equipment acquired under capital leases is recorded at the present value of the minimum lease payments required during the lease period. Expenditures for major renewals and betterments that extend the useful lives of property, plant and equipment are capitalized. Expenditures for maintenance and repairs are charged to expense as incurred. When assets are sold or otherwise disposed of, the cost and related accumulated depreciation are eliminated from the accounts and any resulting gain or loss is recognized in earnings. Depreciation is provided on the straight-line method over the estimated useful lives of twenty to thirty-one and one-half years for buildings and three to seven years for machinery and equipment, furniture and fixtures and office equipment, which includes enterprise resource planning software. Leasehold improvements are amortized over the shorter of the lease term or the estimated useful life of the leased asset.
Intangible Assets	Intangible Assets Intangible assets resulting from the acquisitions of entities are estimated by management based on the fair value of assets acquired. These include acquired customer lists, technology, patents, trade names, covenants not to compete and IPR&D. Intangible assets are amortized from two to eight years on a straight-line basis which represents the estimated periods of benefit and the expected pattern of consumption. During 2009, the Company recorded impairments of indefinite-lived intangible assets of $11,699. These impairment charges are classified in discontinued operations in the consolidated statements of operations as the intangible assets relate to the two discontinued product lines.
Goodwill	Goodwill Goodwill is the amount by which the cost of acquired net assets exceeded the fair value of those net assets on the date of acquisition. The Company allocates goodwill to reporting units at the time of acquisition or when there is a change in the reporting structure and bases that allocation on which reporting units will benefit from the acquired assets and liabilities. Reporting units are defined as operating segments or one level below an operating segment, referred to as a component. The Company has determined that its reporting units are components of its one operating segment. The Company assesses goodwill for impairment on an annual basis as of October 31 or more frequently when events and circumstances occur indicating that the recorded goodwill may be impaired. If the book value of a reporting unit exceeds its fair value, the implied fair value of goodwill is compared with the carrying amount of goodwill. If the carrying amount of goodwill exceeds the implied fair value, an impairment loss is recorded equal to that excess. During 2009, the Company recorded a goodwill impairment charge of $193,254. In 2010, the Company reclassified $53,840 of the goodwill impairment charge to discontinued operations as it related to the two discontinued product lines.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets The Company evaluates the recoverability of its long-lived assets whenever events and changes in circumstances indicate that the carrying amount of an asset may not be fully recoverable. This periodic review may result in an adjustment of estimated depreciable lives or asset impairment. When indicators of impairment are present, the carrying values of the asset are evaluated in relation to their operating performance and future undiscounted cash flows of the underlying business. If the future undiscounted cash flows are less than their book value, impairment exists. The impairment is measured as the difference between the book value and the fair value of the underlying asset. Fair values are based on estimates of market prices and assumptions concerning the amount and timing of estimated future cash flows and assumed discount rates, reflecting varying degrees of perceived risk. During 2009, the Company recorded an impairment charge of $3,544 resulting from the write-down of the value of a building to its estimated fair value.
Foreign Exchange	Foreign Exchange The functional currency of the majority of the Company’s foreign subsidiaries is the applicable local currency. For those subsidiaries, assets and liabilities are translated to U.S. dollars at year-end exchange rates. Income and expense accounts are translated at the average exchange rates prevailing during the year. The resulting translation adjustments are included in accumulated other comprehensive income in consolidated stockholders’ equity. Foreign exchange transaction gains and losses, which arise from transaction activity, are reflected in selling, general and administrative expenses in the statement of operations.
Income Taxes	Income Taxes The Company records income taxes using the asset and liability method. Deferred income tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective income tax bases, and operating loss and tax credit carryforwards. On a quarterly basis, the Company evaluates both the positive and negative evidence that affects the realizability of net deferred tax assets and assesses the need for a valuation allowance. The future benefit to be derived from its deferred tax assets is dependent upon its ability to generate sufficient future taxable income to realize the assets. The Company records a valuation allowance to reduce its net deferred tax assets to the amount that is more likely than not to be realized. To the extent the Company establishes a valuation allowance an expense will be recorded as a component of the provision for income taxes on the statement of operations. As of December 31, 2009, the Company had a valuation allowance of $5,201 primarily related to state tax credit carryforwards. During 2010, the Company increased the valuation allowance by $20,066 primarily related to capital losses incurred from its divested business operations, as the Company determined it is more likely than not that this tax attribute will not be realized. As a result, the valuation allowance was $25,267 at December 31, 2010. During 2011, the Company increased its valuation allowance by $1,208 primarily related to capital losses incurred from its foreign affiliates as management determined it is more likely than not that the deferred tax assets related to these attributes will not be realized. As a result, the valuation allowance is $26,475 at December 31, 2011. Accounting for income taxes requires a two-step approach to recognize and measure uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if, based on the technical merits, it is more likely than not that the position will be sustained upon audit, including resolutions of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon ultimate settlement. The Company reevaluates these uncertain tax positions on a quarterly basis. This evaluation is based on factors including, but not limited to, changes in facts or circumstances, changes in tax law, effectively settled issues under audit and new audit activity. Any change in these factors could result in the recognition of a tax benefit or an additional charge to the tax provision.

Basis of Presentation (Tables)

12 Months Ended

Dec. 31, 2011

Basis of Presentation [Abstract]

Cash provided by operating activities and cash used in financing activities related to excess tax benefit amounts associated with stock-based compensation


	2009
Net cash provided by operating activities:
As reported	$	7,368
As adjusted		4,903

Change	$	(2,465	)

Net cash used in financing activities:
As reported	$	(8,021	)
As adjusted		(5,556	)

Change	$	2,465

Investments (Tables)

12 Months Ended

Dec. 31, 2011

Investments [Abstract]

Fair value of short-term available-for-sale investments

<table cellspacing="0" cellpadding="0" width="92%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr> <td width="76%"> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Years Ended December 31,</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2010</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Available-for-sale investments: </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> Time deposits </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">37</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">15,716</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Bankers acceptance drafts </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">962</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> U.S. treasury obligations </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">29,404</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">76,542</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> U.S. agency obligations </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">221,565</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">176,708</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Mutual funds(1) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">491</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">251,968</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">269,457</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Trading investments: </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Mutual funds(1) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">635</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td> </td> </tr> <tr> <td valign="top"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">252,603</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">269,457</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td> </td> </tr>  </table> <table style="border-collapse:collapse; text-align: left" border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td width="4%" valign="top" align="left">(1)</td> <td align="left" valign="top"> During the third quarter of 2011, the Company re-classified the mutual funds from short-term available-for-sale investments to trading investments as it was management’s intention that these investments would be actively traded. The mutual funds are associated with the Company’s supplemental defined contribution retirement obligations. </td> </tr> </table>

Fair value of long-term available-for-sale investments


	Years Ended December 31,
	2011		2010
U.S. agency obligations	$	7,873	$	—

Gross unrealized gains and (losses) aggregated by investment category short-term and long-term securities


	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
As of December 31, 2011:
Short-term investments:
Available-for-sale investments:
Time deposits	$	37	$	—	$	—		$	37
Bankers acceptance drafts		962		—		—			962
U.S. treasury obligations		29,393		11		—			29,404
U.S. agency obligations		221,516		56		(7	)		221,565

	$	251,908	$	67	$	(7	)	$	251,968
Long-term investments:
U.S. agency obligations	$	7,876	$	—	$	(3	)	$	7,873


	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
As of December 31, 2010:
Short-term investments:
Available-for-sale investments:
Time deposits	$	15,716	$	—	$	—		$	15,716
U.S. treasury obligations		76,538		4		—			76,542
U.S. agency obligations		176,702		38		(32	)		176,708
Mutual funds		659		—		(168	)		491

	$	269,615	$	42	$	(200	)	$	269,457

- Definition

Tabular disclosure of available-for-sale securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 03-1
-Paragraph 21
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 17
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 19, 20, 21
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27337-111563

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27198-111563

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803

+ Details

Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2011

Fair Value Measurements [Abstract]

Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis


			Fair Value Measurements at Reporting Date Using
Description	December 31, 2011		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents: Money market funds	$	137,976	$	137,976	$	—	$	—
Trading securities:
Mutual funds		635		635		—		—
Available-for-sale securities:
Bankers acceptance drafts		962		—		962		—
U.S. treasury obligations		29,404		—		29,404		—
U.S. agency obligations		229,438		147,546		81,892		—
Derivatives — currency forward contracts		531		—		531		—

Total assets	$	398,946	$	286,157	$	112,789	$	—

Liabilities:
Derivatives — currency forward contracts	$	1,054	$	—	$	1,054	$	—

Reported as follows:
Assets:
Cash and cash equivalents(1)	$	137,976	$	137,976	$	—	$	—
Short-term investments(2)		252,566		140,308		112,258		—
Other current assets		531		—		531		—

	$	391,073	$	278,284	$	112,789	$	—

Long-term investments	$	7,873	$	7,873	$	—	$	—

Liabilities:
Other current liabilities	$	1,054	$	—	$	1,054	$	—

(1)	The cash and cash equivalent amounts presented in the table above do not include cash of $146,035 and non-negotiable time deposits of $28,905 as of December 31, 2011.

(2)	The short-term investments presented in the table above do not include non-negotiable time deposits of $37 as of December 31, 2011.


			Fair Value Measurements at Reporting Date Using
Description	December 31, 2010		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents:
Money market funds	$	7,032	$	7,032	$	—	$	—
Bankers acceptance drafts		2,838		—		2,838		—
U.S. treasury obligations		29,996		29,996		—		—
U.S. agency obligations		14,795		14,795		—		—
Available-for-sale securities:
U.S. treasury obligations		76,543		76,543		—		—
U.S. agency obligations		176,707		176,707		—		—
Mutual funds		491		491		—		—
Derivatives — currency forward contracts		369		—		369		—

Total assets	$	308,771	$	305,564	$	3,207	$	—

Liabilities:
Derivatives — currency forward contracts	$	3,463	$	—	$	3,463	$	—

Reported as follows:
Assets:
Cash and cash equivalents(1)	$	54,661	$	51,823	$	2,838	$	—
Short-term investments(2)		253,741		253,741		—		—
Other current assets		369		—		369		—

	$	308,771	$	305,564	$	3,207	$	—

Liabilities:
Other current liabilities	$	3,463	$	—	$	3,463	$	—

(1)	The cash and cash equivalent amounts presented in the table above, do not include cash of $107,815 as of December 31, 2010.

(2)	The short-term investment amounts presented in the table above do not include $15,716 as of December 31, 2010. These amounts represent non-negotiable time deposits which are not subject to the fair value disclosure requirements.

Inventories (Tables)

12 Months Ended

Dec. 31, 2011

Inventories [Abstract]

Inventories


	Years Ended December 31,
	2011		2010
Raw material	$	78,501	$	82,012
Work in process		21,298		21,891
Finished goods		53,833		52,526

	$	153,632	$	156,429

Derivatives (Tables)

12 Months Ended

Dec. 31, 2011

Derivatives [Abstract]

Summary of the primary net hedging positions and corresponding fair values


	December 31, 2011
Currency Hedged (Buy/Sell)	Gross Notional Value		Fair Value(1)
U.S. Dollar/Japanese Yen	$	18,676	$	(961	)
U.S. Dollar/South Korean Won		10,799		60
U.S. Dollar/Euro		3,869		288
U.S. Dollar/U.K. Pound Sterling		2,775		90

Total	$	36,119	$	(523	)


	December 31, 2010
Currency Hedged (Buy/Sell)	Gross Notional Value		Fair Value(1)
U.S. Dollar/Japanese Yen	$	50,104	$	(2,876	)
U.S. Dollar/South Korean Won		27,574		(563	)
U.S. Dollar/Euro		6,934		305
U.S. Dollar/U.K. Pound Sterling		3,054		40

Total	$	87,666	$	(3,094	)

(1)	Represents the net receivable (payable) amount included in the consolidated balance sheet.

Summary of the fair value amounts of the Company's derivative instruments


	Years Ended December 31,
Derivatives Designated as Hedging Instruments	2011			2010
Derivative assets:
Forward exchange contracts	$	531		$	369
Derivative liabilities:
Forward exchange contracts		(1,054	)		(3,463	)

Total net derivative asset (liability) designated as hedging instruments(1)	$	(523	)	$	(3,094	)

Summary of the gain (losses) on derivatives designated as hedging instruments


	Years Ended December 31,
Derivatives Designated as Cash Flow Hedging Relationships	2011			2010			2009
Forward exchange contracts:
Net gain (loss) recognized in OCI(1)	$	4,311		$	(3,346	)	$	1,290
Net gain (loss) reclassified from accumulated OCI into income(2)	$	(4,021	)		(957	)		1,062
Net gain recognized in income(3)		—			—			313

(1)	Net change in the fair value of the effective portion classified in OCI.

(2)	Effective portion classified as selling, general and administrative in 2011 and as cost of products in 2010 and 2009, respectively.

(3)	Ineffective portion amount excluded from effectiveness testing, classified in selling, general and administrative.

Summary of gains on derivatives not designated as hedging instruments


	Years Ended December 31,
Derivatives Not Designated as Hedging Instruments	2011		2010		2009
Forward exchange contracts:
Net gain recognized in income(1)	$	—	$	—	$	9

(1)	Classified in selling, general and administrative.

- Definition

Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5579245-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624163-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624171-113959

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41678-113959

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(n)(2))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41638-113959

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5580258-113959

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5579240-113959

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41641-113959

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41620-113959

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 25
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986

+ Details

Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2011

Property, Plant and Equipment [Abstract]

Property, plant and equipment


	Years Ended December 31,
	2011		2010
Land	$	8,119	$	8,131
Buildings		64,962		63,633
Machinery and equipment		107,304		97,888
Furniture and fixtures, office equipment and software		48,516		50,642
Leasehold improvements		18,617		18,385
Construction in progress		7,075		3,968

		254,593		242,647
Less: accumulated depreciation and amortization		182,106		173,671

	$	72,487	$	68,976

Goodwill, Intangible Assets and Other Long-Lived Assets (Tables)

12 Months Ended

Dec. 31, 2011

Goodwill, Intangible Assets and Other Long-Lived Assets [Abstract]

Goodwill


	2011							2010
	Gross Carrying Amount		Accumulated Impairment Loss			Net		Gross Carrying Amount			Accumulated Impairment Loss			Net
Beginning balance at January 1	$	279,434	$	(139,414	)	$	140,020	$	337,765		$	(193,254	)	$	144,511
Acquired goodwill(1)(2)		64		—			64		2,292			—			2,292
Sale of discontinued operations(3)		—		—			—		(60,623	)		53,840			(6,783	)

Ending balance at December 31	$	279,498	$	(139,414	)	$	140,084	$	279,434		$	(139,414	)	$	140,020

(1)	In September 2011, the Company purchased a product line from GE Osmonics, Inc. for $458. The Company recorded $315 of intangible assets and $64 of goodwill in connection with the acquisition.

(2)	In November 2010, the Company purchased a technology company for $2,447 to enhance its product portfolio. The Company recorded $2,292 of goodwill in connection with the acquisition.

(3)	In May 2010, the Company sold its Ion business and in August 2010 it sold the assets of its YDI business and as a result charged the related goodwill to the gain on sale of discontinued operations.

Intangible assets

Components of the Company’s acquired intangible assets are comprised of the following:


As of December 31, 2011:	Gross		Accumulated Amortization			Net
Completed technology	$	76,829	$	(76,829	)	$	—
Customer relationships		9,190		(8,393	)		797
Patents, trademarks, trade names and other		24,703		(24,457	)		246

	$	110,722	$	(109,679	)	$	1,043


As of December 31, 2010:	Gross(1)		Accumulated Amortization(1)			Net
Completed technology	$	76,829	$	(76,230	)	$	599
Customer relationships		8,940		(8,083	)		857
Patents, trademarks, trade names and other		24,638		(24,351	)		287

	$	110,407	$	(108,664	)	$	1,743

(1)	Excludes $18,299 and $16,603 from gross and accumulated amortization, respectively, as a result of the Company’s sale of its Ion business and assets of its YDI business.

Estimated amortization expense


Year	Amount
2012	$	436
2013		423
2014		52
2015		36
2016		36
Thereafter		60

- Definition

Tabular disclosure of goodwill by reportable segment and in total. Disclosure details may include, but are not limited to, the carrying amount of goodwill, goodwill acquired during the year, goodwill impairment losses recognized, goodwill written-off due to the sale of a business unit, goodwill not yet allocated, and any other changes to goodwill.

+ References + Details

Other Assets (Tables)

12 Months Ended

Dec. 31, 2011

Other Assets [Abstract]

Other Assets


	Years Ended December 31,
	2011		2010
Other Current Assets:
Income tax receivable	$	12,005	$	—
Prepaid income taxes		8,540		6,579
Other		13,693		5,998

Total other current assets	$	34,238	$	12,577

Other Assets:
Deferred tax assets, net	$	10,274	$	15,076
Other		1,992		3,703

Total other assets	$	12,266	$	18,779

Other Liabilities (Tables)

12 Months Ended

Dec. 31, 2011

Other Liabilities [Abstract]

Other Liabilities


	Years Ended December 31,
	2011		2010
Other Current Liabilities:
Product warranties	$	8,315	$	9,865
Deferred revenue		11,553		4,970
Non-income taxes		8,319		5,715
Other		12,137		17,418

Total other current liabilities	$	40,324	$	37,968

Other Liabilities:
Long-term income tax payable	$	16,084	$	13,688
Accrued compensation		15,174		11,064
Other		953		936

Total other liabilities	$	32,211	$	25,688

Product Warranties (Tables)

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies/Product Warranties [Abstract]

Product warranty activities


	Years Ended December 31,
	2011			2010
Beginning balance	$	9,865		$	6,560
Provisions for product warranties		5,766			9,518
Direct charges to warranty liability		(7,316	)		(6,213	)

Ending balance	$	8,315		$	9,865

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2011

Income Taxes [Abstract]

Reconciliation of the Company's effective tax rate to the U.S. federal statutory rate


	Years Ended December 31,
	2011			2010			2009
U.S. Federal income tax statutory rate		35.0	%		35.0	%		(35.0	)%
Federal and state tax credits		(0.7	)		(1.1	)		(2.2	)
State income taxes, net of federal benefit		1.1			1.0			(0.6	)
Effect of foreign operations taxed at various rates		(4.1	)		(2.4	)		(2.2	)
Qualified production activity tax benefit		(1.1	)		(0.8	)		(0.6	)
Non-deductible goodwill		—			—			27.2
Deferred tax asset valuation allowance		0.6			(0.1	)		0.3
Other		(0.5	)		0.7			0.9

		30.3	%		32.3	%		(12.2	)%

The components of income before income taxes and the related provision (benefit) for Income taxes


	Years Ended December 31,
	2011			2010		2009
Income (loss) from continuing operations before income taxes:
United States	$	108,474		$	110,779	$	(193,341	)
Foreign		77,578			85,645		23,321

	$	186,052		$	196,424	$	(170,020	)


Current taxes (benefit):
United States Federal	$	25,824		$	27,789	$	(24,606	)
State		2,602			3,323		(175	)
Foreign		20,346			22,296		7,265

		48,772			53,408		(17,516	)

Deferred taxes (benefit):
United States Federal		7,795			10,021		(394	)
State and Foreign		(246	)		76		(2,749	)

		7,549			10,097		(3,143	)

Provision (benefit) for income taxes	$	56,321		$	63,505	$	(20,659	)

Significant components of the deferred tax assets and deferred tax liabilities


	Years Ended December 31,
	2011			2010
Deferred tax assets:
Loss carryforwards and credits	$	28,053		$	27,604
Inventory and warranty reserves		8,789			17,116
Accounts receivable and other accruals		6,875			2,794
Stock-based compensation		4,610			5,692
Executive supplemental retirement benefits		4,826			4,584
Other		1,245			3,824

Total deferred tax assets	$	54,398		$	61,614


Deferred tax liabilities:
Acquired intangible assets		(3,330	)		(3,927	)
Depreciation and amortization		(3,679	)		(1,621	)
Other		(22	)		(1,948	)

Total deferred tax liabilities		(7,031	)		(7,496	)

Valuation allowance		(26,475	)		(25,267	)

Net deferred tax assets	$	20,892		$	28,851

Reconciliation of the beginning and ending amount of gross unrecognized tax benefits


	Years Ended December 31,
	2011			2010			2009
Balance at beginning of year	$	21,314		$	9,085		$	14,678
Decreases for prior years		(3	)		(6	)		(41	)
Increases for the current year		15,988			12,839			1,693
Reductions related to settlements with taxing authorities		(2,148	)		—			(7,245	)
Reductions related to expiration of statute of limitations		—			(604	)		—

Balance at end of year	$	35,151		$	21,314		$	9,085

- Definition

Tabular disclosure of tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities (i.e., uncertain tax positions) and other types of income tax contingencies, including: (1) the policy on classification of interest and penalties; (2) a tabular reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period; the total amount(s) of: (3) unrecognized tax benefits that, if recognized, would affect the effective tax rate, and (4) interest and penalties recognized in each of the income statement and balance sheet; (5) for positions for which it is reasonably possible that the total amounts unrecognized will significantly change within 12 months of the reporting date the: (i) nature of the uncertainty, (ii) nature of the event that could occur that would cause the change, and (iii) an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made; and (6) a description of tax years that remain subject to examination by major tax jurisdictions.

+ References + Details

Discontinued Operations (Tables)

12 Months Ended

Dec. 31, 2011

Discontinued Operations [Abstract]

Net revenues and income (loss) from discontinued operations


	Years Ended December 31,
	2011		2010			2009
Net revenues	$	—	$	11,974		$	18,713
Income (loss) from discontinued operations before income taxes		—		2,320			(68,837	)
Gain from disposal of discontinued operations before income taxes		—		4,432			—
Income tax (benefit)		—		(2,916	)		(5,539	)

Income (loss) from discontinued operations	$	—	$	9,668		$	(63,298	)

Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2011

Stockholders' Equity [Abstract]

Summary of activity for RSUs


	Years Ended December 31,
	2011					2010					2009
	Non-vested RSUs			Weighted Average Grant Date Fair Value		Non-vested RSUs			Weighted Average Grant Date Fair Value		Non-vested RSUs			Weighted Average Grant Date Fair Value
Non-vested RSUs — beginning of period		1,327,306		$	18.34		1,581,883		$	19.77		1,824,990		$	21.87
Granted		397,492		$	30.27		555,995		$	19.63		682,156		$	15.27
Vested		(569,891	)	$	20.42		(706,224	)	$	20.65		(666,247	)	$	21.91
Forfeited or expired		(39,902	)	$	18.36		(104,348	)	$	18.32		(259,016	)	$	17.25

Non-vested RSUs — end of period		1,115,005		$	21.50		1,327,306		$	18.34		1,581,883		$	19.77

Summary of activity for options


	Years Ended December 31,
	2011					2010					2009
	Options			Weighted Average Exercise Price		Options			Weighted Average Exercise Price		Options			Weighted Average Exercise Price
Outstanding — beginning of period		1,793,214		$	22.38		2,514,822		$	21.67		4,558,838		$	23.44
Exercised		(1,351,684	)	$	22.46		(568,464	)	$	16.49		(134,118	)	$	14.54
Forfeited or expired		(20,818	)	$	22.66		(153,144	)	$	32.51		(1,909,898	)	$	26.18

Outstanding — end of period		420,712		$	21.97		1,793,214		$	22.38		2,514,822		$	21.67

Exercisable at end of period		420,712		$	21.97		1,793,214		$	22.38		2,514,197		$	21.67

Summary of information with respect to options outstanding and exercisable


	Options Outstanding and Exercisable
	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (In Years)		Aggregate Intrinsic Value (In Thousands)
$13.54 – $18.44		205,884	$	15.91		2.18		2,451
$20.07 – $27.77		139,989	$	25.18		2.18		370
$29.93 – $38.30		74,839	$	32.63		1.33		—

		420,712						2,821

Summary of accumulated other comprehensive income (loss)


	Cumulative Translation Adjustments		Financial Instruments Designated as Cash Flow Hedges			Unrealized Gain (Loss) on Investments			Accumulated Other Comprehensive Income (Loss)
Balance at December 31, 2009	$	10,101	$	570		$	(31	)	$	10,640
Foreign currency translation adjustment, net of tax of $0		3,710		—			—			3,710
Changes in value of financial instruments designated as cash flow hedges, net of tax benefit of $1,576		—		(2,600	)		—			(2,600	)
Change in unrealized gain on investments, net of tax of $17		—		—			28			28

Balance at December 31, 2010	$	13,811	$	(2,030	)	$	(3	)	$	11,778
Foreign currency translation adjustment, net of tax of $0		129		—			—			129
Changes in value of financial instruments designated as cash flow hedges, net of tax of $937		—		1,570			—			1,570
Change in unrealized gain on investments, net of tax of $79		—		—			133			133

Balance at December 31, 2011	$	13,940	$	(460	)	$	130		$	13,610

Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Stock-Based Compensation [Abstract]

Effect of recording stock-based compensation


	Years Ended December 31,
	2011			2010			2009
Stock-based compensation expense by type of award:
Employee stock options	$	—		$	—		$	158
Restricted stock		10,126			10,026			8,218
Employee stock purchase plan		1,099			578			469

Total stock-based compensation		11,225			10,604			8,845
Tax effect on stock-based compensation		(5,019	)		(1,253	)		1,258

Net effect on net income or net loss	$	6,206		$	9,351		$	10,103

Effect on net earnings or loss per share:
Basic	$	0.12		$	0.19		$	0.20

Diluted	$	0.12		$	0.18		$	0.20

Pre-tax effect within the consolidated statements of operations of recording stock-based compensation


	Years Ended December 31,
	2011		2010		2009
Cost of sales	$	1,511	$	1,452	$	1,298
Research and development expense		2,197		2,391		2,026
Selling, general and administrative expense		7,517		6,761		5,521

Total pre-tax stock-based compensation expense	$	11,225	$	10,604	$	8,845

Fair value of the employees' purchase rights estimated using the Black-Scholes option-pricing model


	Years Ended December 31,
	2011			2010			2009
Employee stock purchase rights:
Expected life (years)		0.5			0.5			0.5
Risk-free interest rate		0.2	%		0.2	%		0.5	%
Expected volatility		31.9	%		48.7	%		68.0	%
Expected annual dividends per share	$	0.60		$	—		$	—

- Definition

Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

+ References + Details

Net Income (Loss) Per Share (Tables)

12 Months Ended

Dec. 31, 2011

Net Income (Loss) Per Share [Abstract]

Computation of basic and diluted net income (loss) per share


	Years Ended December 31,
	2011		2010		2009
Numerator:
Income (loss) from continuing operations	$	129,731	$	132,919	$	(149,361	)
Income (loss) from discontinued operations, net of tax		—		9,668		(63,298	)

Net income (loss)	$	129,731	$	142,587	$	(212,659	)

Denominator:
Shares used in net income (loss) per common share — basic		52,169,000		50,077,000		49,318,000
Effect of dilutive securities:
Stock options, restricted stock and employee stock purchase plan		678,000		850,000		—

Shares used in net income (loss) per common share — diluted		52,847,000		50,927,000		49,318,000

Basic income (loss) per common share:
Continuing operations	$	2.49	$	2.66	$	(3.03	)
Discontinued operations		—		0.19		(1.28	)

Net income (loss)	$	2.49	$	2.85	$	(4.31	)

Diluted income (loss) per common share:
Continuing operations	$	2.45	$	2.61	$	(3.03	)
Discontinued operations		—		0.19		(1.28	)

Net income (loss)	$	2.45	$	2.80	$	(4.31	)

Geographic, Product and Significant Customer Information (Tables)

12 Months Ended

Dec. 31, 2011

Geographic, Product and Significant Customer Information [Abstract]

Company's operations in different geographic regions


	Years Ended December 31,
	2011		2010		2009
Geographic net sales
United States	$	391,122	$	484,139	$	212,639
Japan		106,003		118,537		47,704
Europe		115,362		96,545		63,876
Asia		210,030		153,893		68,474

	$	822,517	$	853,114	$	392,693


	Years Ended December 31,
	2011		2010
Long — lived assets(1)
United States	$	56,760	$	54,840
Japan		3,908		4,273
Europe		5,437		4,970
Asia		8,374		8,597

	$	74,479	$	72,680

(1)	Long-lived assets include property, plant and equipment, net and certain other assets.

Net product and service revenues from product groups


	Years Ended December 31,
	2011		2010		2009
Instruments and Control Systems	$	413,584	$	430,468	$	205,877
Power and Reactive Gas Products		327,151		343,827		148,191
Vacuum and Other Products		81,782		78,819		38,625

	$	822,517	$	853,114	$	392,693

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies/Product Warranties [Abstract]

Minimum lease payments under leases


	Operating Leases
Year ending December 31,
2012	$	7,619
2013		5,817
2014		4,741
2015		3,518
2016		3,039
Thereafter		3,989

Total minimum lease payments	$	28,723


	Quarter Ended
	March 31		June 30		Sept. 30		Dec. 31
	(Table in thousands, except per share data) (Unaudited)
2011
Statement of Operations Data
Net sales	$	231,851	$	224,487	$	194,508	$	171,671
Gross profit		106,361		104,988		87,678		75,961
Income from continuing operations		38,043		38,601		30,373		22,714
Net income	$	38,043	$	38,601	$	30,373	$	22,714
Basic income per share:
Continuing operations	$	0.74	$	0.74	$	0.58	$	0.43
Net income	$	0.74	$	0.74	$	0.58	$	0.43
Diluted income per share:
Continuing operations	$	0.73	$	0.73	$	0.57	$	0.43
Net income	$	0.73	$	0.73	$	0.57	$	0.43
Cash dividends paid per common share	$	0.15	$	0.15	$	0.15	$	0.15
2010
Statement of Operations Data
Net sales	$	192,166	$	220,647	$	221,323	$	218,978
Gross profit		85,495		97,319		98,503		97,321
Income from continuing operations		28,998		33,144		36,601		34,176
Income from discontinued operations, net of taxes(1)		227		5,633		2,035		1,773
Net income	$	29,225	$	38,777	$	38,636	$	35,949
Basic income per share:
Continuing operations	$	0.58	$	0.66	$	0.73	$	0.68
Net income	$	0.59	$	0.77	$	0.77	$	0.71
Diluted income per share:
Continuing operations	$	0.57	$	0.65	$	0.72	$	0.67
Net income	$	0.58	$	0.76	$	0.76	$	0.70
Cash dividends paid per common share	$	—	$	—	$	—	$	—

(1)	Income from discontinued operations, net of taxes for the quarter ended June 30, 2010 includes a $4.2 million gain on the sale of the Company’s Ion product line.

Business Description (Details)	12 Months Ended
Business Description (Details)	Dec. 31, 2011 Segment Product
Business Description (Textual) [Abstract]
Number of operating segment \| Segment	1
Number of product groups \| Product	3

Basis of Presentation (Details) $ in Thousands	12 Months Ended
Basis of Presentation (Details) $ in Thousands	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($) Product	Dec. 31, 2009 USD ($)
Net cash provided by operating activities:
Cash flow adjustment excess tax benefit	$ 5,338	$ 2,112	$ 40
Net cash used in financing activities:
Cash flow adjustment excess tax benefit	$ 5,338	$ 2,112	40
Basis of Presentation (Textual) [Abstract]
Number of company divested product lines \| Product		2
As reported [Member]
Net cash provided by operating activities:
Cash flow adjustment excess tax benefit			7,368
Net cash used in financing activities:
Cash flow adjustment excess tax benefit			(8,021)
As adjusted [Member]
Net cash provided by operating activities:
Cash flow adjustment excess tax benefit			4,903
Net cash used in financing activities:
Cash flow adjustment excess tax benefit			(5,556)
Change [Member]
Net cash provided by operating activities:
Cash flow adjustment excess tax benefit			(2,465)
Net cash used in financing activities:
Cash flow adjustment excess tax benefit			$ 2,465

Summary of Significant Accounting Policies (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2011 USD ($) yr Customer Product	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)
Concentration Risk [Line Items]
Concentration Risk, Percentage	10.00%
Summary of Significant Accounting Policies (Textual) [Abstract]
Minimum Period of Company's Research and Development Projects	3 months
Maximum Period of Company's Research and Development Projects	30 months
Maximum Maturity Period of Liquid Investments	3 months
Amortization period of leasehold improvements.	shorter of the lease term or the estimated useful life of the leased asset
Sales revenue goods and service net percentage	14.00%	16.00%	13.00%
Sales to semiconductor equipment and device manufactures as % of net sales	61.00%	64.00%	52.00%
Number of customers comprising major accounts receivable \| Customer	0
Number of customers comprising of Net sales \| Customer	1
Company's accounts receivable for the period	10% or more
Intangible assets amortized Minimum	2
Intangible assets amortized Maximum	8
Number of discontinued product lines \| Product	2
Impairments of indefinite-lived intangible assets \| $			$ 11,699
Impairment of goodwill \| $	$ 0	$ 0	193,255
Goodwill impairment charges re-classified to discontinued operations \| $	0
Goodwill impairment charges re-classified to discontinued operations \| $	0	53,840
Valuation Allowance \| $	26,475	25,267	5,201
Increased Valuation Allowance \| $	$ 1,208	$ 20,066	548
Maximum Percentage of Recognition of tax benefits from uncertain tax positions	50.00%
Impairment charge, Building \| $			$ 3,544
Building [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives Minimum	20
Estimated useful lives Maximum	31.5
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives Minimum	3
Estimated useful lives Maximum	7
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives Minimum	3
Estimated useful lives Maximum	7
Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives Minimum	3
Estimated useful lives Maximum	7

Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Available-for-sale investments:
Fair value of short-term available-for-sale investments	$ 251,968	$ 269,457
Trading investments:
Short-term investments	252,603	269,457
Fair value of long-term available-for-sale investments
Fair value of long-term available-for-sale investments, U.S. agency obligations	7,873	0
Time deposits [Member]
Available-for-sale investments:
Fair value of short-term available-for-sale investments	37	15,716
Bankers acceptance drafts [Member]
Available-for-sale investments:
Fair value of short-term available-for-sale investments	962	0
U.S. treasury obligations [Member]
Available-for-sale investments:
Fair value of short-term available-for sale investments, U.S. agency obligations	29,404	76,542
US agency obligations [Member]
Available-for-sale investments:
Fair value of short-term available-for sale investments, U.S. agency obligations	221,565	176,708
Fair value of long-term available-for-sale investments
Fair value of long-term available-for-sale investments, U.S. agency obligations	7,873	0
Mutual funds [Member]
Available-for-sale investments:
Fair value of short-term available-for-sale investments	0	491
Trading investments:
Fair value of short-term investments, non-negotiable time deposits	$ 635	$ 0

Investments (Details 1) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Gross unrealized gains and (losses) aggregated by investment category
Short-term Investments, Cost	$ 251,908	$ 269,615
Short-term Investments, Gross Unrealized Gains	67	42
Short-term Investments, Gross Unrealized (Losses)	(7)	(200)
Short-term Investments, Estimated Fair Value	251,968	269,457
Long-term investments, Estimated Fair Value	7,873	0
Time deposits [Member]
Gross unrealized gains and (losses) aggregated by investment category
Short-term Investments, Cost	37	15,716
Short-term Investments, Gross Unrealized Gains	0	0
Short-term Investments, Gross Unrealized (Losses)	0	0
Short-term Investments, Estimated Fair Value	37	15,716
Bankers acceptance drafts [Member]
Gross unrealized gains and (losses) aggregated by investment category
Short-term Investments, Cost	962
Short-term Investments, Gross Unrealized Gains	0
Short-term Investments, Gross Unrealized (Losses)	0
Short-term Investments, Estimated Fair Value	962	0
Mutual funds [Member]
Gross unrealized gains and (losses) aggregated by investment category
Short-term Investments, Cost		659
Short-term Investments, Gross Unrealized Gains		0
Short-term Investments, Gross Unrealized (Losses)		(168)
Short-term Investments, Estimated Fair Value	0	491
U.S. treasury obligations [Member]
Gross unrealized gains and (losses) aggregated by investment category
Short-term Investments, Cost	29,393	76,538
Short-term Investments, Gross Unrealized Gains	11	4
Short-term Investments, Gross Unrealized (Losses)	0	0
Short-term Investments, Estimated Fair Value	29,404	76,542
U.S. agency obligations [Member]
Gross unrealized gains and (losses) aggregated by investment category
Short-term Investments, Cost	221,516	176,702
Short-term Investments, Gross Unrealized Gains	56	38
Short-term Investments, Gross Unrealized (Losses)	(7)	(32)
Short-term Investments, Estimated Fair Value	221,565	176,708
Long Term Available For Sale Securities Amortized Cost	7,876
Long Term Available For Sale Securities Gross Unrealized Gain Long Term	0
Long-term Investments, Gross Unrealized (Losses)	(3)
Long-term investments, Estimated Fair Value	$ 7,873	$ 0

Fair Value Measurements (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Available-for-sale debt securities:
Short-term investments	$ 251,968	$ 269,457
Long-term investments, Estimated Fair Value	7,873	0
Fair Value, Measurements, Recurring [Member]
Assets:
Cash and Cash Equivalents	137,976	54,661
Available-for-sale debt securities:
Derivatives - currency forward contracts	531	369
Short-term investments (2)	252,566	253,741
Other current assets	531	369
Total current assets	398,946	308,771
Long-term investments, Estimated Fair Value	7,873
Liabilities:
Other current liabilities	1,054	3,463
Derivatives - currency forward contracts	1,054	3,463
Fair Value, Measurements, Recurring [Member] \| Money market funds [Member]
Assets:
Cash and Cash Equivalents	137,976	7,032
Fair Value, Measurements, Recurring [Member] \| Mutual funds [Member]
Trading securities:
Mutual funds	635
Available-for-sale debt securities:
Short-term investments		491
Fair Value, Measurements, Recurring [Member] \| Bankers acceptance drafts [Member]
Assets:
Cash and Cash Equivalents		2,838
Available-for-sale debt securities:
Available-for-sale securities	962
Fair Value, Measurements, Recurring [Member] \| U.S. treasury obligations [Member]
Assets:
Cash and Cash Equivalents		29,996
Available-for-sale debt securities:
Available-for-sale securities	29,404	76,543
Fair Value, Measurements, Recurring [Member] \| U.S. agency obligations [Member]
Assets:
Cash and Cash Equivalents		14,795
Available-for-sale debt securities:
Available-for-sale securities	229,438	176,707
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value, Measurements, Recurring [Member]
Assets:
Cash and Cash Equivalents	137,976	7,032
Available-for-sale debt securities:
Derivatives - currency forward contracts	0	0
Short-term investments (2)	140,308	253,741
Other current assets	0	0
Total current assets	286,157	305,564
Long-term investments, Estimated Fair Value	7,873
Liabilities:
Other current liabilities	0	0
Derivatives - currency forward contracts	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value, Measurements, Recurring [Member] \| Money market funds [Member]
Assets:
Cash and Cash Equivalents	137,976	7,032
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value, Measurements, Recurring [Member] \| Mutual funds [Member]
Trading securities:
Mutual funds	635
Available-for-sale debt securities:
Short-term investments		491
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value, Measurements, Recurring [Member] \| Bankers acceptance drafts [Member]
Assets:
Cash and Cash Equivalents		0
Available-for-sale debt securities:
Available-for-sale securities	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value, Measurements, Recurring [Member] \| U.S. treasury obligations [Member]
Assets:
Cash and Cash Equivalents		29,996
Available-for-sale debt securities:
Available-for-sale securities	0	76,543
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value, Measurements, Recurring [Member] \| U.S. agency obligations [Member]
Assets:
Cash and Cash Equivalents		14,795
Available-for-sale debt securities:
Available-for-sale securities	147,546	176,707
Significant Other Observable Inputs (Level 2) [Member] \| Fair Value, Measurements, Recurring [Member]
Assets:
Cash and Cash Equivalents	0	2,838
Available-for-sale debt securities:
Derivatives - currency forward contracts	531	369
Short-term investments (2)	112,258	0
Other current assets	531	369
Total current assets	112,789	3,207
Long-term investments, Estimated Fair Value	0
Liabilities:
Other current liabilities	1,054	3,463
Derivatives - currency forward contracts	1,054	3,463
Significant Other Observable Inputs (Level 2) [Member] \| Fair Value, Measurements, Recurring [Member] \| Money market funds [Member]
Assets:
Cash and Cash Equivalents	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Fair Value, Measurements, Recurring [Member] \| Mutual funds [Member]
Trading securities:
Mutual funds	0
Available-for-sale debt securities:
Short-term investments		0
Significant Other Observable Inputs (Level 2) [Member] \| Fair Value, Measurements, Recurring [Member] \| Bankers acceptance drafts [Member]
Assets:
Cash and Cash Equivalents		2,838
Available-for-sale debt securities:
Available-for-sale securities	962
Significant Other Observable Inputs (Level 2) [Member] \| Fair Value, Measurements, Recurring [Member] \| U.S. treasury obligations [Member]
Assets:
Cash and Cash Equivalents		0
Available-for-sale debt securities:
Available-for-sale securities	29,404	0
Significant Other Observable Inputs (Level 2) [Member] \| Fair Value, Measurements, Recurring [Member] \| U.S. agency obligations [Member]
Assets:
Cash and Cash Equivalents		0
Available-for-sale debt securities:
Available-for-sale securities	81,892	0
Significant Unobservable Inputs (Level 3) [Member] \| Fair Value, Measurements, Recurring [Member]
Assets:
Cash and Cash Equivalents	0	0
Available-for-sale debt securities:
Derivatives - currency forward contracts	0	0
Short-term investments (2)	0	0
Other current assets	0	0
Total current assets	0	0
Long-term investments, Estimated Fair Value	0
Liabilities:
Other current liabilities	0	0
Derivatives - currency forward contracts	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Fair Value, Measurements, Recurring [Member] \| Money market funds [Member]
Assets:
Cash and Cash Equivalents	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Fair Value, Measurements, Recurring [Member] \| Mutual funds [Member]
Trading securities:
Mutual funds	0
Available-for-sale debt securities:
Short-term investments		0
Significant Unobservable Inputs (Level 3) [Member] \| Fair Value, Measurements, Recurring [Member] \| Bankers acceptance drafts [Member]
Assets:
Cash and Cash Equivalents		0
Available-for-sale debt securities:
Available-for-sale securities	0
Significant Unobservable Inputs (Level 3) [Member] \| Fair Value, Measurements, Recurring [Member] \| U.S. treasury obligations [Member]
Assets:
Cash and Cash Equivalents		0
Available-for-sale debt securities:
Available-for-sale securities	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Fair Value, Measurements, Recurring [Member] \| U.S. agency obligations [Member]
Assets:
Cash and Cash Equivalents		0
Available-for-sale debt securities:
Available-for-sale securities	$ 0	$ 0

Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	$ 251,968	$ 269,457
Fair Value Measurements (Textual) [Abstract]
Cash	146,035	107,815
Non Negotiable time Deposits	28,905
Time deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	$ 37	$ 15,716

- Definition

Investments in debt and equity securities which are categorized neither as trading securities nor held-to-maturity securities and which are intended be sold or mature within one year from the balance sheet date or the normal operating cycle, whichever is longer. Such securities are reported at fair value; unrealized gains (losses) related to Available-for-sale Securities are excluded from earnings and reported in a separate component of shareholders' equity (other comprehensive income), unless the Available-for-sale security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding gain (loss) of an Available-for-sale security that is designated as being hedged in a fair value hedge is recognized in earnings during the period of the hedge, as are other than temporary declines in fair value below the cost basis for investments in equity securities and debt securities that an entity intends to sell or it is more likely than not that it will be required to sell before the recovery of its amortized cost basis. Other than temporary declines in fair value below the cost basis for debt securities categorized as Available-for-sale that an entity does not intend to sell and for which it is not more likely than not that the entity will be required to sell before the recovery of its amortized cost basis are bifurcated into credit losses and losses related to all other factors. Other than temporary declines in fair value below cost basis related to credit losses are recognized in earnings, and losses related to all other factors are recognized in other comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 12
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 22
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 16
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Chapter 3
-Section A
-Paragraph 4, 5
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 13, 17
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6379932&loc=d3e22054-111558

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 15C
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 15D
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Derivatives (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Currency Hedged (Buy/Sell)
Currency Hedged (Buy/Sell), Gross Notional Value, Net	$ 36,119	$ 87,666
Currency Hedged (Buy/Sell), Fair Value, Net	(523)	(3,094)
U.S. Dollar/Japanese Yen [Member]
Currency Hedged (Buy/Sell)
Currency Hedged (Buy/Sell), Gross Notional Value, Net	18,676	50,104
Currency Hedged (Buy/Sell), Fair Value, Net	(961)	(2,876)
U.S. Dollar/South Korean Won [Member]
Currency Hedged (Buy/Sell)
Currency Hedged (Buy/Sell), Gross Notional Value, Net	10,799	27,574
Currency Hedged (Buy/Sell), Fair Value, Net	60	(563)
U.S. Dollar/Euro [Member]
Currency Hedged (Buy/Sell)
Currency Hedged (Buy/Sell), Gross Notional Value, Net	3,869	6,934
Currency Hedged (Buy/Sell), Fair Value, Net	288	305
U.S. Dollar/U.K. Pound Sterling [Member]
Currency Hedged (Buy/Sell)
Currency Hedged (Buy/Sell), Gross Notional Value, Net	2,775	3,054
Currency Hedged (Buy/Sell), Fair Value, Net	$ 90	$ 40

Derivatives (Details 1) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Derivative liabilities:
Total net derivative asset (liability) designated as hedging instruments	$ (523)	$ (3,094)
Designated as Hedging Instrument [Member]
Derivative assets:
Derivative assets	531	369
Derivative liabilities:
Derivative liabilities	(1,054)	(3,463)
Total net derivative asset (liability) designated as hedging instruments	$ (523)	$ (3,094)

Derivatives (Details 2) - Forward exchange contracts [Member] - Cash Flow Hedging [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Derivatives Designated as Cash Flow Hedging Relationships
Net gain (loss) recognized in OCI	$ 4,311	$ (3,346)	$ 1,290
Net Gain (loss) reclassified from OCI into income	(4,021)	(957)	1,062
Net Gain recognized in income	$ 0	$ 0	$ 313

- Definition

The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

+ References + Details

Derivatives (Details 3) - USD ($) $ in Thousands	12 Months Ended
Derivatives (Details 3) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Not Designated as Hedging Instrument [Member]
Derivatives not designated as hedging instruments
Net gain recognized in income	$ 0	$ 0	$ 9

Derivatives (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Derivatives (Textual) [Abstract]
Maximum period for hedging a portion of forecasted foreign currency denominated intercompany sales of inventory	18 Months
Gross notional values of outstanding forward foreign exchange contracts	$ 36,119	$ 87,666
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative asset classified in other current assets	531	369
Derivative liability classified in other current liabilities	$ 1,054	$ 3,463

Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Inventories:
Raw materials	$ 78,501	$ 82,012
Work-in-process	21,298	21,891
Finished goods	53,833	52,526
Inventories	$ 153,632	$ 156,429

Inventories (Details Textual) - USD ($) $ in Thousands	12 Months Ended
Inventories (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Inventories (Textual) [Abstract]
Inventory related excess and obsolete charges	$ 14,857	$ 13,230	$ 20,335

- Definition

Charge to cost of goods sold that represents the reduction of the carrying amount of inventory, generally attributable to obsolescence or market conditions.

+ References + Details

Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Property, plant and equipment
Land	$ 8,119	$ 8,131
Buildings	64,962	63,633
Machinery and equipment	107,304	97,888
Furniture and fixtures and office equipment	48,516	50,642
Leasehold improvements	18,617	18,385
Construction in progress	7,075	3,968
Property, plant and equipment, gross	254,593	242,647
Less: accumulated depreciation and amortization	182,106	173,671
Property, plant and equipment, net	$ 72,487	$ 68,976

Property, Plant and Equipment (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Property plant and equipment (Textual) [Abstract]
Reclassified amount of depreciation and amortization of property, plant and equipment	$ 0	$ 85	$ 264
Depreciation and amortization of property, plant and equipment	$ 11,965	$ 12,298	$ 14,352

Goodwill, Intangible Assets and Other Long-Lived Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Goodwill
Goodwill gross carrying amount, Beginning balance	$ 279,434	$ 337,765
Accumulated impairment loss	(139,414)	(139,414)	$ (193,254)
Goodwill gross carrying amount, Ending balance	279,498	279,434
Acquired goodwill	64	2,292
Impairment losses gross carrying amount	0	(60,623)
Sale of discontinued operations, accumulated impairment loss	0	53,840
Sale of discontinued operation goodwill, net	0	(6,783)
Goodwill, net	$ 140,084	$ 140,020	$ 144,511

- Definition

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 43
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 68
-Subparagraph l
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6905597&loc=d3e13816-109267

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 72
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-Clause 1
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Goodwill, Intangible Assets and Other Long-Lived Assets (Details 1) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	$ 110,722	$ 110,407
Accumulated Amortization	(109,679)	(108,664)
Intangible assets, net	1,043	1,743
Completed technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	76,829	76,829
Accumulated Amortization	(76,829)	(76,230)
Intangible assets, net	0	599
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	9,190	8,940
Accumulated Amortization	(8,393)	(8,083)
Intangible assets, net	797	857
Patents, trademarks, trade names and other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	24,703	24,638
Accumulated Amortization	(24,457)	(24,351)
Intangible assets, net	$ 246	$ 287

Goodwill, Intangible Assets and Other Long-Lived Assets (Details 2) $ in Thousands	12 Months Ended
	Dec. 31, 2011 USD ($)
Estimated amortization expense
2012	$ 436
2013	423
2014	52
2015	36
2016	36
Thereafter	$ 60

Goodwill, Intangible Assets and Other Long-Lived Assets (Details Textual) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2009	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Sep. 30, 2011	Nov. 30, 2010
Goodwill and intangible assets (Textual) [Abstract]
Impairment losses		$ 0	$ 0	$ 193,255
Goodwill impairment charges re-classified to discontinued operations		0	53,840
Definite-lived intangible asset impairment	$ 11,699
Finite lived intangible assets excluded amount gross related to sale of assets and units			18,299
Finite lived intangible assets excluded amount from accumulated amortization related to sale of assets and units			16,603
Aggregate amortization expense related to acquired intangibles		$ 1,015	1,525	4,407
Amortization expense re-classified to discontinued operations			242	1,645
Long-lived asset carrying amount				4,841
Net realizable value of long-lived asset				1,297
Long Lived Assets impairment charges				$ 3,544
Net proceeds from the sale of long-lived assets held			1,297
Net proceeds received for long-lived asset			785
Recorded gain from sale of long lived assets			$ 682
GE Osmonics [Member]
Business Acquisition [Line Items]
Goodwill in connection with acquisition					$ 64
Purchased a product line from GE Osmonics					458
Intangible asset in connection with acquisition					$ 315
Technology Company [Member]
Business Acquisition [Line Items]
Goodwill in connection with acquisition						$ 2,292
Purchased amount of a technology company						$ 2,447

Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Income tax receivable	$ 12,005	$ 0
Prepaid Income taxes	8,540	6,579
Other	13,693	5,998
Total other current assets	34,238	12,577
Other Assets:
Deferred tax assets, net	10,274	15,076
Other	1,992	3,703
Total other assets	$ 12,266	$ 18,779

- Definition

The noncurrent portion as of the balance sheet date of the aggregate carrying amount of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws; after the valuation allowance, if any, to reduce such amount to net realizable value. Deferred tax liabilities and assets are classified as current or noncurrent based on the classification of the related asset or liability for financial reporting. A deferred tax liability or asset that is not related to an asset or liability for financial reporting, including deferred tax assets related to carryforwards, is classified according to the expected reversal date of the temporary difference.

+ References + Details

- Definition

Carrying amount due within one year of the balance sheet date (or one operating cycle, if longer) from tax authorities as of the balance sheet date representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes.

+ References + Details

Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Other Current Liabilities:
Product warranties	$ 8,315	$ 9,865
Deferred revenue	11,553	4,970
Non-income taxes	8,319	5,715
Other	12,137	17,418
Total other current liabilities	40,324	37,968
Other Liabilities:
Long-term income tax payable	16,084	13,688
Accrued compensation	15,174	11,064
Other	953	936
Total other liabilities	$ 32,211	$ 25,688

Product Warranties (Details) - USD ($) $ in Thousands	12 Months Ended
Product Warranties (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Product warranty activities
Beginning balance	$ 9,865	$ 6,560
Provision for product warranties	5,766	9,518
Direct charges to warranty liability	(7,316)	(6,213)
Ending balance	$ 8,315	$ 9,865

Restructuring (Details) $ in Thousands	12 Months Ended
Restructuring (Details) $ in Thousands	Dec. 31, 2009 USD ($) People
Restructuring (Textual) [Abstract]
Reduction in the Company's worldwide headcount due to global financial crisis \| People	630
Reduction in the Company's worldwide headcount due to global financial crisis, Percentage	24.00%
Gross Restructuring Charges	$ 5,812
Restructuring charges of severance and employee related charges to discontinued operations	$ 296

Debt (Details) $ in Thousands	12 Months Ended
Debt (Details) $ in Thousands	Dec. 31, 2011 USD ($) Institution
Debt (Textual) [Abstract]
Number of financial institutions that provide for aggregate borrowings \| Institution	2
Aggregate Borrowing Capacity	$ 32,200
Aggregate borrowings expire and renewed	3 month intervals
Total borrowings outstanding	$ 1,932
Average interest rates on line of credit and short-term borrowing arrangement	0.65%

Income Taxes (Details)	12 Months Ended
Income Taxes (Details)	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Reconciliation of the Company's effective tax rate to the U.S. federal statutory rate
U.S. Federal income tax statutory rate	35.00%	35.00%	(35.00%)
Federal and state tax credits	(0.70%)	(1.10%)	(2.20%)
State income taxes, net of federal benefit	1.10%	1.00%	(0.60%)
Effect of foreign operations taxed at various rates	(4.10%)	(2.40%)	(2.20%)
Qualified production activity tax benefit	(1.10%)	(0.80%)	(0.60%)
Non-deductible goodwill	0.00%	0.00%	27.20%
Deferred tax asset valuation allowance	0.60%	(0.10%)	0.30%
Other	(0.50%)	0.70%	0.90%
Total	30.30%	32.30%	(12.20%)

Income Taxes (Details 1) - USD ($) $ in Thousands	12 Months Ended
Income Taxes (Details 1) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income (loss) from continuing operations before income taxes:
United States	$ 108,474	$ 110,779	$ (193,341)
Foreign	77,578	85,645	23,321
Income (loss) from continuing operations before income taxes	186,052	196,424	(170,020)
Current taxes (benefit):
United States Federal	25,824	27,789	(24,606)
State	2,602	3,323	(175)
Foreign	20,346	22,296	7,265
Current taxes (benefit), Total	48,772	53,408	(17,516)
Deferred taxes (benefit):
United States Federal	7,795	10,021	(394)
State and Foreign	(246)	76	(2,749)
Deferred taxes, Total	7,549	10,097	(3,143)
Provision (benefit) for income taxes	$ 56,321	$ 63,505	$ (20,659)

Income Taxes (Details 2) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Deferred tax assets:
Loss carryforwards and credits	$ 28,053	$ 27,604
Inventory and warranty reserves	8,789	17,116
Accounts receivable and other accruals	6,875	2,794
Stock-based compensation	4,610	5,692
Executive supplemental retirement benefits	4,826	4,584
Other	1,245	3,824
Total deferred tax assets	54,398	61,614
Deferred tax liabilities:
Acquired intangible assets	(3,330)	(3,927)
Depreciation and amortization	(3,679)	(1,621)
Other	(22)	(1,948)
Total deferred tax liabilities	(7,031)	(7,496)
Valuation allowance	(26,475)	(25,267)
Net deferred tax assets	$ 20,892	$ 28,851

Income Taxes (Details 3) - USD ($) $ in Thousands	12 Months Ended
Income Taxes (Details 3) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Reconciliation of the beginning and ending amount of gross unrecognized tax benefits
Balance at beginning of year	$ 21,314	$ 9,085	$ 14,678
Increase (decrease) for prior years	(3)	(6)	(41)
Increases for the current year	15,988	12,839	1,693
Reductions related to settlements with taxing authorities	(2,148)	0	(7,245)
Reductions related to expiration of statute of limitations	0	(604)	0
Balance at end of year	$ 35,151	$ 21,314	$ 9,085

Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
Income Taxes (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Income Tax Examination [Line Items]
Net benefit to income tax expense, excluding interest and penalties, due to discreet reserve releases	$ 2,148		$ 5,725
Income Taxes (Textual) [Abstract]
Gross Massachusetts tax research credit carryforwards	$ 7,739
Tax credit Expiration Period	2026
Expired US federal capital loss carry forwards related to the sale of a business		$ 1,936
Expired business credit carryforward related to sale of business		810
US Federal net operating losses remain available to the Company		3,553
Gross unrecognized tax benefits excluding interest and penalties	$ 35,151	21,314	9,085	$ 14,678
Net unrecognized tax benefit that would impact the effective tax rate	15,354
Accrued interest on unrecognized tax benefits	973	986	651
Increased Valuation Allowance	1,208	20,066	548
Valuation allowance related to capital losses incurred from the Company's divested business operations,	26,475	25,267	5,201
Undistributed earnings in foreign subsidiaries	382,415
Tax holiday resulted in income tax savings	1,000	$ 2,700	$ 300
Minimum [Member]
Income Tax Contingency [Line Items]
Unrecognized tax benefits related to various U.S. federal, state and foreign tax positions	2,800
Maximum [Member]
Income Tax Contingency [Line Items]
Unrecognized tax benefits related to various U.S. federal, state and foreign tax positions	3,400
2013 [Member]
Capital Loss Carryforwards [Line Items]
U.S. Federal capital loss carryforwards	2,110
2015 [Member]
Capital Loss Carryforwards [Line Items]
U.S. Federal capital loss carryforwards	$ 59,275

Discontinued Operations (Details) - USD ($) $ in Thousands	12 Months Ended
Discontinued Operations (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net revenues and income (loss) from discontinued operations
Net revenues	$ 0	$ 11,974	$ 18,713
Income (loss) from discontinued operations before income taxes	0	2,320	(68,837)
Gain from disposal of discontinued operations before income taxes	0	4,432	0
Income tax (benefit)	0	(2,916)	(5,539)
Income (loss) from discontinued operations	$ 0	$ 9,668	$ (63,298)

- Definition

Pretax gain (loss), not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

+ References + Details

- Definition

Overall income (loss) from a disposal group that is classified as a component of the entity, before income tax, reported as a separate component of income before extraordinary items. Includes the following (before income tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

+ References + Details

- Definition

Tax effect allocated to a disposal group that is classified as a component of the entity reported as a separate component of income before extraordinary items. Includes the tax effects of the following: income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 43
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 47
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 46
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32672-109319

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b),(c)
-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 20
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6909487&loc=d3e38679-109324

+ Details

- Definition

This element represents the overall income (loss) from a disposal group that is classified as a component of the entity, net of income tax, reported as a separate component of income before extraordinary items before deduction or consideration of the amount which may be allocable to noncontrolling interests, if any. Includes the following (net of tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 43
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 47
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 29
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 5
-Section 03
-Paragraph 15

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 13
-Article 7

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.12)
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.14)
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

+ Details

Discontinued Operations (Details Textual) $ in Thousands	12 Months Ended
Discontinued Operations (Details Textual) $ in Thousands	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($) Product	Dec. 31, 2009 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain from disposal of discontinued operations before income taxes	$ 0	$ 4,432	$ 0
Discontinued Operations (Textual) [Abstract]
Discontinued operation, number of product lines sold \| Product		2
Goodwill and intangible asset Impairment Charges Discontinued Operations			$ 65,539
Ion [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net proceeds from sale of discontinued operations		$ 15,092
Gain from disposal of discontinued operations before income taxes		4,208
YDI [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net proceeds from sale of discontinued operations		490
Gain from disposal of discontinued operations before income taxes		$ 224

- Definition

+ References + Details

Stockholders' Equity (Details) - $ / shares	12 Months Ended
Stockholders' Equity (Details) - $ / shares	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Summary of activity for RSUs
Weighted Average Grant Date Fair Value, Granted	$ 5.87	$ 5.48	$ 4.44
RSU [Member]
Summary of activity for RSUs
Non-vested RSUs beginning of period	1,327,306	1,581,883	1,824,990
Weighted Average Grant Date Fair Value, Beginning period	$ 18.34	$ 19.77	$ 21.87
Granted	397,492	555,995	682,156
Weighted Average Grant Date Fair Value, Granted	$ 30.27	$ 19.63	$ 15.27
Vested	(569,891)	(706,224)	(666,247)
Weighted Average Grant Date Fair Value, Vested	$ 20.42	$ 20.65	$ 21.91
Forfeited or expired	(39,902)	(104,348)	(259,016)
Weighted Average Grant Date Fair Value, Forfeited or expired	$ 18.36	$ 18.32	$ 17.25
Non-vested RSUs - end of period	1,115,005	1,327,306	1,581,883
Weighted Average Grant Date Fair Value, end of period	$ 21.50	$ 18.34	$ 19.77

Stockholders' Equity (Details 1) - $ / shares	12 Months Ended
Stockholders' Equity (Details 1) - $ / shares	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Summary of activity for options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning of Period	$ 22.38	$ 21.67	$ 23.44
Options, exercised	(1,351,684)	(568,464)	(134,118)
Weighted Average Exercise Price, exercised	$ 22.46	$ 16.49	$ 14.54
Options, forfeited or expired	(20,818)	(153,144)	(1,909,898)
Weighted Average Exercise Price, forfeited or expired	$ 22.66	$ 32.51	$ 26.18
Outstanding - end of period	420,712	1,793,214	2,514,822
Outstanding - beginning of period	1,793,214	2,514,822	4,558,838
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, End of Period	$ 21.97	$ 22.38	$ 21.67
Options, Exercisable at end of period	420,712	1,793,214	2,514,197
Weighted Average Exercise Price, Exercisable at end of period	$ 21.97	$ 22.38	$ 21.67

Stockholders' Equity (Details 2) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2011 USD ($) yr $ / shares shares
Summary of information with respect to options outstanding and exercisable
Options Outstanding and Exercisable, Number of Shares \| shares	420,712
Options Outstanding and Exercisable, Weighted Average Remaining Contractual Life \| yr	2
Share-based Compensation Arrangement By Share-based Payment Award Options Exercisable Intrinsic Value 1 \| $	$ 2,821
Range One [Member]
Summary of information with respect to options outstanding and exercisable
Options Outstanding and Exercisable, Exercise price range lower range limit	$ 13.54
Options Outstanding and Exercisable, Exercise price range upper range limit	$ 18.44
Options Outstanding and Exercisable, Number of Shares \| shares	205,884
Options Outstanding and Exercisable, Weighted Average Exercise Price	$ 15.91
Options Outstanding and Exercisable, Weighted Average Remaining Contractual Life \| yr	2.18
Share-based Compensation Arrangement By Share-based Payment Award Options Exercisable Intrinsic Value 1 \| $	$ 2,451
Range Two [Member]
Summary of information with respect to options outstanding and exercisable
Options Outstanding and Exercisable, Exercise price range lower range limit	$ 20.07
Options Outstanding and Exercisable, Exercise price range upper range limit	$ 27.77
Options Outstanding and Exercisable, Number of Shares \| shares	139,989
Options Outstanding and Exercisable, Weighted Average Exercise Price	$ 25.18
Options Outstanding and Exercisable, Weighted Average Remaining Contractual Life \| yr	2.18
Share-based Compensation Arrangement By Share-based Payment Award Options Exercisable Intrinsic Value 1 \| $	$ 370
Range Three [Member]
Summary of information with respect to options outstanding and exercisable
Options Outstanding and Exercisable, Exercise price range lower range limit	$ 29.93
Options Outstanding and Exercisable, Exercise price range upper range limit	$ 38.30
Options Outstanding and Exercisable, Number of Shares \| shares	74,839
Options Outstanding and Exercisable, Weighted Average Exercise Price	$ 32.63
Options Outstanding and Exercisable, Weighted Average Remaining Contractual Life \| yr	1.33
Share-based Compensation Arrangement By Share-based Payment Award Options Exercisable Intrinsic Value 1 \| $	$ 0

Stockholders' Equity (Details 3) - USD ($) $ in Thousands	12 Months Ended
Stockholders' Equity (Details 3) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Cumulative Translation Adjustments, Beginning Balance	$ 13,811	$ 10,101
Financial Instruments Designated as Cash Flow Hedges, Beginning Balance	(2,030)	570
Unrealized Gain (Loss) on Investments, Beginning Balance	(3)	(31)
Accumulated Other Comprehensive Income (Loss), Beginning Balance	11,778	10,640
Foreign currency translation adjustment net of taxes of $0 for 2010 and $0 for 2011	129	3,710	$ 3,062
Changes in value of financial instruments designated as cash flow hedges, net of $1,576 and $683 for 2011	1,570	(2,600)
Change in unrealized gain on investments, net of tax of $17 and $58 for 2011	133	28	92
Cumulative Translation Adjustments, Ending Balance	13,940	13,811	10,101
Financial Instruments Designated as Cash Flow Hedges, Ending Balance	(460)	(2,030)	570
Unrealized Gain (Loss) on Investments, Ending Balance	130	(3)	(31)
Accumulated Other Comprehensive Income (Loss), Ending Balance	$ 13,610	$ 11,778	$ 10,640

- Definition

Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

+ References

+ Details

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

+ Details

- Definition

Net of tax effect change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges after taxes. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. The change includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 46
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 24
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 14, 17, 20, 26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 31, 46
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 14, 17, 20, 24, 26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 55
-Paragraph 2
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6920433&loc=d3e998-108581

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(3)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

Adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency of the reporting entity, net of tax.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 24
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 14, 17, 19, 26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 52
-Paragraph 13, 20, 31
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 45
-Paragraph 20
-Subparagraph (b),(c)
-URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32211-110900

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 55
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6920433&loc=d3e998-108581

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(3)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

Appreciation or loss in value (before reclassification adjustment) of the total of unsold securities during the period being reported on, net of tax. Reclassification adjustments include: (1) the unrealized holding gain (loss), net of tax, at the date of the transfer for a debt security from the held-to-maturity category transferred into the available-for-sale category. Also includes the unrealized gain (loss) at the date of transfer for a debt security from the available-for-sale category transferred into the held-to-maturity category; (2) the unrealized gains (losses) realized upon the sale of securities, after tax; and (3) the unrealized gains (losses) realized upon the write-down of securities, after tax.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 13
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 24
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 17, 22
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e637-108580

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e653-108580

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 55
-Paragraph 2
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=6920433&loc=d3e998-108581

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(3)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Stockholders' Equity (Details Textual) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2012 $ / shares	Dec. 31, 2011 USD ($) yr $ / shares Rate shares	Dec. 31, 2010 USD ($) $ / shares shares	Dec. 31, 2009 USD ($) $ / shares
Stockholders Equity (Textual) [Abstract]
Aggregate dollar amount of outstanding common stock approved for repurchase under the Company's share repurchase program \| $		$ 200,000
Stock repurchase, Shares		86,000
Value of shares repurchased \| $		$ 2,007
Cash dividends paid per share for four quarterly dividends \| $ / shares		$ 0.15
Cash dividends paid per share for the year \| $ / shares		$ 0.60	$ 0.00	$ 0.00
Quarterly cash dividend \| $ / shares	$ 0.15
Vesting percentage per year of RSUs from date of grant		33.30%
Total cash dividend paid \| $		$ 31,373	$ 0	$ 0
Average price of repurchased shares \| $ / shares		$ 23.40
Closing stock price per share \| $ / shares		$ 27.82
Cash received from employees as a result of employee stock option exercises \| $		$ 30,362	9,375
Tax benefits realized for stock option exercises \| $		$ 3,790	1,262
Percentage of exercise price equal to the fair value of common stock at the date of grant		100.00%
Number of in-the-money options exercisable		345,873
Foreign currency translation adjustment, net of tax \| $		$ 0	0
Changes in value of financial instruments designated as cash flow hedges, net of tax (benefit) \| $		937	(1,576)
Change in unrealized gain on investments, net of tax \| $		$ 79	$ 17
Weighted average remaining contractual life of options exercisable \| yr		2
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common Stock, shares issued		52,491,948	50,648,601
Stock options expired \| yr		10
Stock options granted to employees under plans prior to 2001, vested after one year		5.00%
Director [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation arrangement by share based payment award vesting period description		generally vested at the earliest of (1) one day prior to the next annual meeting, (2) 13 months from date of grant, or (3) the effective date of an acquisition
Purchase Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of payroll deduction to compensation		up to 10%
Common Stock, shares issued		137,410	67,132
Common stock, exercise price \| $ / shares		$ 18.26
Shares reserved for future issuance		492,721
Shares authorized for issuance		1,950,000
Percentage of Common Stock through payroll deductions		10.00%
Percentage of closing price of the Common Stock		85.00%
Purchase Plan [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, exercise price \| $ / shares		$ 21.62
Purchase Plan [Member] \| Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, exercise price \| $ / shares		$ 18.26
Foreign Purchase Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Price of option to Percentage of Closing price of common stock		85.00%
Common Stock, shares issued		29,969	15,063
Common stock, exercise price \| $ / shares		$ 21.62	$ 16.19
Shares reserved for future issuance		126,424
Shares authorized for issuance		400,000
Percentage of Common Stock through payroll deductions		10.00%
Percentage of closing price of the Common Stock		85.00%
Restricted Stock Units Granted to Employees [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation arrangement by share based payment award vesting period description		employees who are at least 60 years old and have a combined years of age plus years of service (as defined) equal to 70 or more, are expensed immediately.
RSU granted to Directors [Member] \| Options granted to Directors [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation arrangement by share based payment award vesting period description		generally vest at the earliest of (1) one day prior to the next annual meeting, (2) 13 months from date of grant, or (3) the effective date of an acquisition
Stock Incentive Plan 2004 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage increase each year in Company's total authorized shares outstanding, authorized for issuance each year under the 2004 Plan		5.00%
Shares available for future grant		11,778,755
Percentage increase of shares authorized for issuance \| Rate		5.00%
Shares authorized for issuance		15,000,000
Stock Incentive Plan 2001 and after [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted to employees under plans prior to 2001, vested after one year		25.00%
Stock options expired \| yr		10
Stock options granted to employees under plans prior to 2001, vested after one year		6.25%
Percentage of exercise price fair value option grant in period		100.00%
Stock Incentive Plan Prior to 2001 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted to employees under plans prior to 2001, vested after one year		20.00%

Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Stock-based compensation expense by type of award:
Pre-tax stock-based compensation	$ 11,225	$ 10,604	$ 8,845
Tax effect on stock-based compensation	(5,019)	(1,253)	1,258
Net effect on net income or net loss	$ 6,206	$ 9,351	$ 10,103
Effect on net earnings or loss per share:
Basic	$ 0.12	$ 0.19	$ 0.20
Diluted	$ 0.12	$ 0.18	$ 0.20
Employee Stock Option [Member]
Stock-based compensation expense by type of award:
Pre-tax stock-based compensation	$ 0	$ 0	$ 158
Restricted Stock [Member]
Stock-based compensation expense by type of award:
Pre-tax stock-based compensation	10,126	10,026	8,218
Employee stock purchase plan [Member]
Stock-based compensation expense by type of award:
Pre-tax stock-based compensation	$ 1,099	$ 578	$ 469

Stock-Based Compensation (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Pre-tax effect within the consolidated statements of operations of recording stock-based compensation
Pre-tax Stock-based compensation	$ 11,225	$ 10,604	$ 8,845
Cost of Sales [Member]
Pre-tax effect within the consolidated statements of operations of recording stock-based compensation
Pre-tax Stock-based compensation	1,511	1,452	1,298
Research and Development Expense [Member]
Pre-tax effect within the consolidated statements of operations of recording stock-based compensation
Pre-tax Stock-based compensation	2,197	2,391	2,026
Selling General and Administrative Expense [Member]
Pre-tax effect within the consolidated statements of operations of recording stock-based compensation
Pre-tax Stock-based compensation	$ 7,517	$ 6,761	$ 5,521

- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References + Details

Stock-Based Compensation (Details 2)	12 Months Ended
Stock-Based Compensation (Details 2)	Dec. 31, 2011 USD ($) yr	Dec. 31, 2010 yr	Dec. 31, 2009 yr
Employee stock purchase rights:
Expected life (years) \| yr	0.5	0.5	0.5
Risk-free interest rate	0.20%	0.20%	0.50%
Expected volatility	31.90%	48.70%	68.00%
Expected annual dividends per share \| $	$ 0.60

Stock-Based Compensation (Details Textual) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2011 USD ($) yr $ / shares shares	Dec. 31, 2010 USD ($) $ / shares shares	Dec. 31, 2009 USD ($) $ / shares shares
Stock-Based Compensation (Textual) [Abstract]
Capitalization of share based payment costs	$ 471
Options granted \| shares	0	0	0
Total intrinsic value of options exercised	$ 9,458	$ 3,518	$ 327
Weighted Average Grant Date Fair Value, Granted \| $ / shares	$ 5.87	$ 5.48	$ 4.44
Total intrinsic value of options exercised	$ 27,199	$ 16,846	$ 10,188
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Estimated weighted average amortization period \| yr	1.7
Unrecognized compensation cost	$ 11,418

Employee Benefit Plans (Details) $ in Thousands	12 Months Ended
Employee Benefit Plans (Details) $ in Thousands	Dec. 31, 2011 USD ($) Age	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)
Employee Benefit Plans (Textual) [Abstract]
Employee contribution to Company's profit sharing plan percentage minimum	1.00%
Employee contribution to Company's profit sharing plan percentage maximum	50.00%
Minimum age limit for specified additional amount \| Age	50
Employers contribution percentage limit	50.00%
Employees maximum contribution as a percentage of salary	6.00%
Company's contributions	$ 2,276	$ 1,472	$ 929
Bonus expense	7,559	18,972	881
Supplemental retirement benefits cost	3,931	3,428	$ 3,138
Accumulated benefit obligation	$ 12,870	$ 12,225

Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Numerator:
Income (Loss) from continuing operations	$ 129,731	$ 132,919	$ (149,361)
Income (Loss) from discontinued operations, net of tax	0	9,668	(63,298)
Net income (loss)	$ 129,731	$ 142,587	$ (212,659)
Denominator:
Shares used in net income (Loss) per common share-basic	52,169,000	50,077,000	49,318,000
Effect of dilutive securities:
Stock options, restricted stock and employee stock purchase plan	678,000	850,000	0
Shares used in net income (Loss) per common share-diluted	52,847,000	50,927,000	49,318,000
Basic income (loss) per common share:
Continuing operations	$ 2.49	$ 2.66	$ (3.03)
Discontinued operations	0.00	0.19	(1.28)
Net income (loss)	2.49	2.85	(4.31)
Diluted income (loss) per common share:
Continuing operations	2.45	2.61	(3.03)
Discontinued operations	0.00	0.19	(1.28)
Net income (loss)	$ 2.45	$ 2.80	$ (4.31)
Net Income Per Share (Textual) [Abstract]
Stock options and restricted stock units	1,536,000	3,121,000	4,097,000
Number of shares excluded from computation of diluted earning per share	259,000	1,256,000	0

Geographic, Product and Significant Customer Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Geographic net sales
Geographic net sales	$ 822,517	$ 853,114	$ 392,693
Long-lived assets:
Long-lived assets	74,479	72,680
Unites States [Member]
Geographic net sales
Geographic net sales	391,122	484,139	212,639
Long-lived assets:
Long-lived assets	56,760	54,840
Japan [Member]
Geographic net sales
Geographic net sales	106,003	118,537	47,704
Long-lived assets:
Long-lived assets	3,908	4,273
Europe [Member]
Geographic net sales
Geographic net sales	115,362	96,545	63,876
Long-lived assets:
Long-lived assets	5,437	4,970
Asia [Member]
Geographic net sales
Geographic net sales	210,030	153,893	$ 68,474
Long-lived assets:
Long-lived assets	$ 8,374	$ 8,597

Geographic, Product and Significant Customer Information (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net product and service revenues from product groups
Net sales from product groups	$ 822,517	$ 853,114	$ 392,693
Instruments and Control Systems [Member]
Net product and service revenues from product groups
Net sales from product groups	413,584	430,468	205,877
Power and Reactive Gas Products [Member]
Net product and service revenues from product groups
Net sales from product groups	327,151	343,827	148,191
Vacuum and Other Products [Member]
Net product and service revenues from product groups
Net sales from product groups	$ 81,782	$ 78,819	$ 38,625

Geographic, Product and Significant Customer Information (Details Textual)	12 Months Ended
	Dec. 31, 2011 Segment Customer Product	Dec. 31, 2010 Customer	Dec. 31, 2009 Customer
Geographic, Product and Significant Customer Information (Textual) [Abstract]
Number of product groups \| Product	3
Sales revenue goods and service net percentage	14.00%	16.00%	13.00%
Sales revenue goods and service to semiconductor capital equipment manufacturers and semiconductor device manufacturers percentage	61.00%	64.00%	52.00%
Number of customers based on threshold limit of revenue \| Customer	1	1	1
Number of business segments \| Segment	1

Commitments and Contingencies (Details) $ in Thousands	Dec. 31, 2011 USD ($)
Minimum lease payments under leases
2012	$ 7,619
2013	5,817
2014	4,741
2015	3,518
2016	3,039
Thereafter	3,989
Total minimum lease payments	$ 28,723

Commitments and Contingencies (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($) LegalMatter	Dec. 31, 2009 USD ($)
Commitments and Contingencies (Textual) [Abstract]
Lease Expiration Date	2022
Rental expenses under operating leases	$ 7,747	$ 8,304	$ 8,974
Purchase commitments covered by aggregate value	$ 141,490
Purchase commitments	less than one year
Material Liabilities	$ 0
Suits Filed in the US District Court for the Eastern District of Texas by Brooks [Member]
Loss Contingencies [Line Items]
Number of Lawsuits filed by Brooks Instruments, LLC \| LegalMatter		2
Suit filed in the US District Court for the District of Massachusetts [Member]
Loss Contingencies [Line Items]
Number of Lawsuits filed by Brooks Instruments, LLC \| LegalMatter		1

Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Valuation and Qualifying Accounts
Accounts receivable allowance, Ending balance	$ 2,516	$ 2,557
Allowance for Trade Receivables [Member]
Valuation and Qualifying Accounts
Balance at beginning of year	2,557	2,415	$ 2,148
Charged to costs and expenses	3,390	3,637	3,655
Charged to other accounts	0	0	0
Deductions	3,431	3,495	3,388
Balance at end of year	2,516	2,557	2,415
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts
Balance at beginning of year	25,267	5,201	4,653
Charged to costs and expenses	0	0	0
Charged to other accounts	1,208	20,833	548
Deductions	0	767	0
Balance at end of year	$ 26,475	$ 25,267	$ 5,201