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Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2013	Oct. 30, 2013
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Entity Registrant Name	MKS INSTRUMENTS INC
Entity Central Index Key	0001049502
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		53,228,335

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 254,778	$ 287,588
Short-term investments	365,876	327,653
Trade accounts receivable, net	98,133	82,060
Inventories	136,060	134,639
Deferred income taxes	10,059	8,194
Other current assets	28,651	28,048
Total current assets	893,557	868,182
Property, plant and equipment, net	78,020	80,516
Long-term investments	5,183	12,158
Goodwill	150,700	150,733
Intangible assets, net	13,316	11,561
Other assets	31,198	29,412
Total assets	1,171,974	1,152,562
Current liabilities:
Accounts payable	27,304	16,803
Accrued compensation	25,190	20,955
Income taxes payable	7,768	4,148
Other current liabilities	35,899	37,405
Total current liabilities	96,161	79,311
Other liabilities	70,391	61,095
Commitments and contingencies (Note 18)
Stockholders' equity:
Preferred Stock, $0.01 par value per share, 2,000,000 shares authorized; none issued and outstanding
Common Stock, no par value, 200,000,000 shares authorized; 53,171,905 and 52,748,849 shares issued and outstanding at September 30, 2013 and December 31, 2012, respectively	113	113
Additional paid-in capital	726,018	718,005
Retained earnings	267,246	278,583
Accumulated other comprehensive income	12,045	15,455
Total stockholders' equity	1,005,422	1,012,156
Total liabilities and stockholders' equity	$ 1,171,974	$ 1,152,562

Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, shares authorized	2,000,000	2,000,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common Stock, par value	$ 0	$ 0
Common Stock, shares authorized	200,000,000	200,000,000
Common Stock, shares issued	53,171,905	52,748,849
Common Stock, shares outstanding	53,171,905	52,748,849

Consolidated Statements of Operations and Comprehensive Income - USD ($)
shares in Thousands, $ in Thousands

3 Months Ended

9 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Net revenues:

Products

$ 139,846

$ 114,647

$ 388,998

$ 427,986

Services

26,607

26,800

76,028

81,726

Total net revenues

166,453

141,447

465,026

509,712

Cost of revenues:

Cost of products

87,809

68,304

237,590

243,950

Cost of services

16,410

16,572

48,542

48,884

Total cost of revenues

104,219

84,876

286,132

292,834

Gross profit

62,234

56,571

178,894

216,878

Research and development

15,257

14,136

47,318

45,911

Selling, general and administrative

33,158

29,661

102,140

96,332

Litigation

5,316

Insurance reimbursement

(1,071)

Completed acquisition costs

851

171

1,258

Restructuring

1,126

1,364

Amortization of intangible assets

361

215

1,537

453

Income from operations

12,332

6,392

27,435

67,608

Interest income

221

299

760

Interest expense

Income before income taxes

12,540

6,659

28,145

68,276

Provision for income taxes

10,082

4,079

12,606

24,356

Net income

2,458

2,580

15,539

43,920

Other comprehensive income:

Changes in value of financial instruments designated as cash flow hedges, net of tax (benefit) expense

^[1]

(891)

(417)

185

(297)

Foreign currency translation adjustments, net of tax of $0 for the three and nine months ended September 30, 2013 and 2012

5,593

6,007

(3,582)

1,955

Unrealized gain (loss) on investments, net of tax expense (benefit)

^[2]

(13)

Total comprehensive income

$ 7,208

$ 8,240

$ 12,129

$ 45,581

Net income per share:

Basic

$ 0.05

$ 0.29

$ 0.83

Diluted

0.05

0.29

0.82

Cash dividends per common share

$ 0.16

$ 0.48

$ 0.46

Weighted average common shares outstanding:

Basic

53,165

52,854

52,998

52,679

Diluted

53,513

53,290

53,410

53,240

[1]	(1) Tax (benefit) was $(491) and $(260) for the three months ended September 30, 2013 and 2012, respectively. Tax expense (benefit) was $161 and $(177) for the nine months ended September 30, 2013 and 2012, respectively.
[2]	(2) Tax expense was $26 and $44 for the three months ended September 30, 2013 and 2012, respectively. Tax (benefit) expense was $(11) and $2 for the nine months ended September 30, 2013 and 2012, respectively.

Consolidated Statements of Operations and Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]
Tax expense (benefit) on changes in value of financial instruments designated as cash flow hedges	$ (491)	$ (260)	$ 161	$ (177)
Tax on foreign currency translation adjustments	0	0	0	0
Tax (benefit) expense on unrealized gain (loss) on investments	$ 26	$ 44	$ (11)	$ 2

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net income	$ 15,539	$ 43,920
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	12,715	10,197
Stock-based compensation	11,509	9,900
Provision for excess and obsolete inventory	16,554	12,596
Deferred income taxes	3,623	3,059
Excess tax benefits from stock-based compensation	(825)	(1,998)
Other	1,234	610
Changes in operating assets and liabilities:
Trade accounts receivable	(17,702)	33,992
Inventories	(17,949)	(893)
Income taxes	3,887	715
Other current assets	(2,974)	2,984
Accrued compensation and other liabilities	5,912	7,516
Accounts payable	10,468	(8,750)
Other non-current assets	(209)
Net cash provided by operating activities	41,782	113,848
Cash flows from investing activities:
Acquisition of businesses, net of cash acquired	(2,326)	(24,385)
Purchases of investments	(374,998)	(363,040)
Maturities of investments	253,231	161,102
Sales of investments	90,580	126,928
Purchases of property, plant and equipment	(9,154)	(11,040)
Other	(59)	(347)
Net cash used in investing activities	(42,726)	(110,782)
Cash flows from financing activities:
Proceeds from short-term borrowings	6	2,896
Payments on short-term borrowings	(776)	(4,956)
Repurchase of common stock	(2,875)	(7,026)
Net payments related to employee stock awards	(2,464)	(830)
Dividend payments to common stockholders	(25,458)	(24,261)
Excess tax benefits from stock-based compensation	825	1,998
Net cash used in financing activities	(30,742)	(32,179)
Effect of exchange rate changes on cash and cash equivalents	(1,124)	1,165
Decrease in cash and cash equivalents	(32,810)	(27,948)
Cash and cash equivalents at beginning of period	287,588	312,916
Cash and cash equivalents at end of period	$ 254,778	$ 284,968

Basis of Presentation

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

Basis of Presentation

1)	Basis of Presentation

The terms “MKS” and the “Company” refer to MKS Instruments, Inc. and its subsidiaries. The interim financial data as of September 30, 2013 and for the three and nine months ended September 30, 2013 and 2012 are unaudited; however, in the opinion of MKS, the interim data includes all adjustments, consisting only of normal recurring adjustments, necessary for a fair statement of the results for the interim periods. The consolidated balance sheet presented as of December 31, 2012 has been derived from the audited consolidated financial statements as of that date. The unaudited consolidated financial statements presented herein have been prepared in accordance with the instructions to Form 10-Q and do not include all of the information and note disclosures required by United States generally accepted accounting principles (“U.S. GAAP”). The consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the MKS Annual Report on Form 10-K for the year ended December 31, 2012 filed with the Securities and Exchange Commission on February 26, 2013.

The preparation of these consolidated 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 consolidated 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.

Revision of prior period financial statements

During the three months ended September 30, 2013, the Company identified a prior period error which affected the previous balance sheets of all interim periods in 2013 and all interim and annual periods in 2012 and 2011 and certain footnote disclosures for annual periods in 2012, 2011 and 2010. The Company previously reported the amounts of its uncertain tax positions on the balance sheets net instead of gross. The Company considered the guidance in Accounting Standards Codification (“ASC”) Topic 740-10-45, Other Presentation Matters and ASC Topic 210-20, Offsetting with respect to this matter. The error had no impact to the income statement, statements of cash flows or the statements of stockholders’ equity of any previously reported periods. In evaluating whether our previously issued consolidated financial statements were materially misstated, the Company considered the guidance in ASC Topic 250, Accounting Changes and Error Corrections, ASC Topic 250-10-S99-1, Assessing Materiality, and ASC Topic 250-10-S99-2, Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements. The Company concluded this error was not material to the prior reporting periods, or to the 2013 results, and therefore, amendments of previously filed reports were not required. Accordingly, during the three months ended September 30, 2013, the Company recorded these prior period adjustments to correct this error. The revisions for these corrections to the applicable prior periods are reflected in the financial information herein and will be reflected in future filings containing such financial information.

The tables below reflect the revisions in the balance sheet line items for the periods ended December 31, 2012 and 2011.


	December 31, 2012
	As previously reported		Adjustment		As revised
Other assets	$	11,692	$	17,720	$	29,412
Other liabilities	$	43,375	$	17,720	$	61,095


	December 31, 2011
	As previously reported		Adjustment		As revised
Other assets	$	12,266	$	15,281	$	27,547
Other liabilities	$	32,211	$	15,281	$	47,492

The tables below reflect the sections in certain footnotes that were affected by the revision for the periods ended December 31, 2012 and 2011.

Other Assets


	December 31, 2012
	As previously reported		Adjustment		As revised
Deferred tax assets, net	$	9,497	$	—	$	9,497
Long-term income tax receivable		—		17,720		17,720
Other		2,195		—		2,195

	$	11,692	$	17,720	$	29,412


	December 31, 2011
	As previously reported		Adjustment		As revised
Deferred tax assets, net	$	10,274	$	—	$	10,274
Long-term income tax receivable		—		15,281		15,281
Other		1,992		—		1,992

	$	12,266	$	15,281	$	27,547

Other Liabilities


	December 31, 2012
	As previously reported		Adjustment		As revised
Long-term income tax payable	$	20,880	$	17,720	$	38,600
Accrued compensation		18,750		—		18,750
Other		3,745		—		3,745

	$	43,375	$	17,720	$	61,095


	December 31, 2011
	As previously reported		Adjustment		As revised
Long-term income tax payable	$	16,084	$	15,281	$	31,365
Accrued compensation		15,174		—		15,174
Other		953		—		953

	$	32,211	$	15,281	$	47,492

Income Taxes


	December 31, 2012
	As previously reported		Adjustment			As revised
Current taxes:
United States	$	10,431	$	4,314		$	14,745
State		783		—			783
Foreign		12,074		(4,314	)		7,760

	$	23,288	$	—		$	23,288


	December 31, 2011
	As previously reported		Adjustment			As revised
Current taxes:
United States	$	25,824	$	15,032		$	40,856
State		2,602		—			2,602
Foreign		20,346		(15,032	)		5,314

	$	48,772	$	—		$	48,772


	December 31, 2010
	As previously reported		Adjustment			As revised
Current taxes:
United States	$	27,789	$	8,807		$	36,596
State		3,323		—			3,323
Foreign		22,296		(8,807	)		13,489

	$	53,408	$	—		$	53,408

Segment Note

A reconciliation of segment assets to consolidated total assets is as follows:


	December 31, 2012
	As previously reported		Adjustment		As revised
Total segment assets	$	216,699	$	—	$	216,699
Cash and cash equivalents and investments		627,399		—		627,399
Other current assets		36,242		—		36,242
Property, plant and equipment, net		80,516		—		80,516
Goodwill and intangible assets, net		162,294		—		162,294
Other assets		11,692		17,720		29,412

Consolidated total assets	$	1,134,842	$	17,720	$	1,152,562


	December 31, 2011
	As previously reported		Adjustment		As revised
Total segment assets	$	274,526	$	—	$	274,526
Cash and cash equivalents and investments		573,392		—		573,392
Other current assets		44,856		—		44,856
Property, plant and equipment, net		72,487		—		72,487
Goodwill and intangible assets, net		141,127		—		141,127
Other assets		12,266		15,281		27,547

Consolidated total assets	$	1,118,654	$	15,281	$	1,133,935

- Definition

The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.

+ References

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+ Details

Recently Issued Accounting Pronouncements

9 Months Ended

Sep. 30, 2013

Accounting Changes And Error Corrections [Abstract]

Recently Issued Accounting Pronouncements

2)	Recently Issued Accounting Pronouncements

In December 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2011-11, “Disclosures about Offsetting Assets and Liabilities.” This ASU is intended to enhance the understanding of the effects of netting arrangements on an entity’s financial statements, including financial instruments and derivative instruments that are either offset or subject to a master netting arrangement. The scope of this ASU includes derivatives, sale and repurchase agreements, reverse sale and repurchase agreements, and securities borrowing and lending arrangements. In January 2013, the FASB issued ASU No. 2013-01 “Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities.” This standard provided additional guidance on the scope of ASU No. 2011-11. The provisions of this ASU are effective for interim and annual periods beginning on or after January 1, 2013. The adoption of ASU No. 2011-11 did not have a material effect on the Company’s consolidated financial statements.

On February 5, 2013, the FASB issued ASU No. 2013-02, “Other Comprehensive Income (Topic 220: Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income.” This ASU is intended to improve the reporting of reclassifications out of accumulated other comprehensive income by requiring an entity to provide information about the amounts reclassified out of accumulated other comprehensive income by component. In addition, an entity is required to present, either on the face of the statement where net income is presented or in the notes, significant amounts reclassified out of accumulated other comprehensive income, by the respective line items of net income but only if the amount reclassified is required under U.S. GAAP to be reclassified to net income in its entirely in the same reporting period. For other amounts that are not required under U.S. GAAP to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures required under U.S. GAAP that provide additional detail about those amounts. The provisions of this ASU are effective prospectively for interim and annual periods beginning after December 15, 2012. The adoption of ASU No. 2013-12 did not have a material effect on the Company’s consolidated financial statements.

On July 18, 2013, the FASB issued ASU 2013-11, “Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists.” Under the new standard, unrecognized tax benefits will be netted against all available same-jurisdiction loss or other tax carryforwards that would be utilized, rather than only against carryforwards that are created by unrecognized tax benefits. The provisions of this ASU are effective for interim and annual periods beginning on or after December 15, 2013. The adoption of ASU No. 2013-11 is not expected to have a material effect on the Company’s consolidated financial statements.

- Definition

The entire disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Investments

9 Months Ended

Sep. 30, 2013

Investments Debt And Equity Securities [Abstract]

Investments

3)	Investments

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


	September 30, 2013		December 31, 2012
Available-for-sale investments:
Bankers’ acceptance drafts	$	330	$	242
Time deposits		77,577		52
Commercial paper and corporate obligations		81,308		—
U.S. treasury obligations		—		13,054
U.S. agency obligations		205,702		313,514

		364,917		326,862
Trading investments:
Mutual funds		959		791

	$	365,876	$	327,653

The fair value of long-term investments with maturities of more than one year consists of the following:


	September 30, 2013		December 31, 2012
Available-for-sale investments:
Time deposits	$	56	$	—
U.S. agency obligations		5,127		12,158

	$	5,183	$	12,158

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


As of September 30, 2013:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Short-term investments:
Bankers’ acceptance drafts	$	330	$	—	$	—		$	330
Time deposits		77,575		5		(3	)		77,577
Commercial paper and corporate obligations		81,300		10		(2	)		81,308
U.S. agency obligations		205,639		63		—			205,702

	$	364,844	$	78	$	(5	)	$	364,917

Long-term investments:
Time deposits	$	56	$	—	$	—		$	56
U.S. agency obligations		5,122		5		—			5,127

U.S. agency obligations	$	5,178	$	5	$	—		$	5,183


As of December 31, 2012:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Short-term investments:
Time deposits	$	52	$	—	$	—		$	52
Bankers’ acceptance drafts		242		—		—			242
U.S. treasury obligations		13,045		9		—			13,054
U.S. agency obligations		313,262		258		(6	)		313,514

	$	326,601	$	267	$	(6	)	$	326,862

Long-term investments:
U.S. agency obligations	$	12,156	$	2	$	—		$	12,158

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. Realized gains or (losses) are reflected in income and were not material for the three and nine months ended September 30, 2013 and 2012, respectively.

The gains and (losses) for trading investments were immaterial for the three and nine months ended September 30, 2013 and 2012.

- Definition

The entire disclosure for investments in certain debt and equity securities.

+ References + Details

Fair Value Measurements

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Fair Value Measurements

4)	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 (unadjusted) in active markets for identical assets or liabilities assessed at the measurement 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, the Company categorizes such assets and liabilities based on the lowest level input that is significant to the fair value measurement in its entirety. The Company’s 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 or liability.

Assets and liabilities of the Company are measured at fair value on a recurring basis as of September 30, 2013 and are summarized as follows:


			Fair Value Measurements at Reporting Date Using
Description	Total September 30, 2013		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	$	57,982	$	57,982	$	—	$	—
Trading securities:
Mutual funds		959		959		—		—
Available-for-sale securities:
Bankers’ acceptance drafts		330		—		330		—
Time deposits		77,633		—		77,633		—
Commercial paper and corporate obligations		81,308		—		81,308		—
U.S. agency obligations		210,829		195,275		15,554		—
Derivatives – currency forward contracts		746		—		746		—

Total assets	$	429,787	$	254,216	$	175,571	$	—

Liabilities:
Derivatives – currency forward contracts	$	749	$	—	$	749	$	—


Reported as follows:
Assets:
Cash and cash equivalents⁽¹⁾	$	57,982	$	57,982	$	—	$	—
Short-term investments		365,876		191,107		174,769		—
Other current assets		746		—		746		—

Total current assets	$	424,604	$	249,089	$	175,515	$	—

Long-term investments	$	5,183	$	5,127	$	56	$	—

Liabilities:
Other current liabilities	$	749	$	—	$	749	$	—

(1)	The cash and cash equivalent amounts presented in the table above do not include cash of $192,396 and non-negotiable time deposits of $4,400 as of September 30, 2013.

Assets and liabilities of the Company are measured at fair value on a recurring basis as of December 31, 2012 and are summarized as follows:


			Fair Value Measurements at Reporting Date Using
Description	Total December 31, 2012		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	$	51,291	$	51,291	$	—	$	—
Bankers acceptance drafts		16		—		16		—
Trading securities:
Mutual funds		791		791		—		—
Available-for-sale securities:
Bankers’ acceptance drafts		242		—		242		—
U.S. treasury obligations		13,054		—		13,054		—
U.S. agency obligations		325,672		295,665		30,007		—
Derivatives – currency forward contracts		961		—		961		—

Total assets	$	392,027	$	347,747	$	44,280	$	—

Liabilities:
Derivatives – currency forward contracts	$	1,310	$	—	$	1,310	$	—

Reported as follows:
Assets:
Cash and cash equivalents⁽¹⁾	$	51,307	$	51,291	$	16	$	—
Short-term investments⁽²⁾		327,601		284,298		43,303		—
Other current assets		961		—		961		—

Total current assets	$	379,869	$	335,589	$	44,280	$	—

Long-term investments	$	12,158	$	12,158	$	—	$	—

Liabilities:
Other current liabilities	$	1,310	$	—	$	1,310	$	—

(1)	The cash and cash equivalent amounts presented in the table above do not include cash of $185,143 and non-negotiable time deposits of $51,138 as of December 31, 2012.

(2)	The short-term investments presented in the table above do not include non-negotiable time deposits of $52 as of December 31, 2012.

Trading Mutual Fund Investments

Trading investments consist of certain U.S. and international equity mutual funds and government agency fixed income mutual funds.

Bankers’ Acceptance Drafts

Bankers’ acceptance drafts are short-term credit investments created by a non-financial firm and guaranteed by a bank. These drafts are often traded at a discount from face value and may be traded on a secondary market.

Available-For-Sale Investments

Available-for-sale investments consisted of time deposits and drafts denominated in the Euro currency, U.S. treasury obligations and U.S. agency obligations. The Company measures its debt and equity investments at fair value.

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 + Details

Derivatives

9 Months Ended

Sep. 30, 2013

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivatives

5)	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 Euro 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 other comprehensive income (“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 September 30, 2013 and December 31, 2012, the Company had outstanding forward foreign exchange contracts with gross notional values of $36,529 and $41,448, respectively. The following tables provide a summary of the primary net hedging positions and corresponding fair values held as of September 30, 2013 and December 31, 2012:


	September 30, 2013
Currency Hedged (Buy/Sell)	Gross Notional Value		F air Value⁽¹⁾ Asset/(Liability)
U.S. Dollar/Japanese Yen	$	11,763	$	746
U.S. Dollar/South Korean Won		18,081		(636	)
U.S. Dollar/Euro		4,241		(76	)
U.S. Dollar/U.K. Pound Sterling		2,444		(37	)

Total	$	36,529	$	(3	)

(1)	Represents the fair value of the net asset / (liability) amount included in the consolidated balance sheets.


	December 31, 2012
Currency Hedged (Buy/Sell)	Gross Notional Value		Fair Value⁽¹⁾ Asset/(Liability)
U.S. Dollar/Japanese Yen	$	13,992	$	961
U.S. Dollar/South Korean Won		19,374		(1,180	)
U.S. Dollar/Euro		4,217		(57	)
U.S. Dollar/U.K. Pound Sterling		3,865		(73	)

Total	$	41,448	$	(349	)

(1)	Represents the fair value of the net asset / (liability) amount included in the consolidated balance sheets.

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


Derivatives Designated as Hedging Instruments	September 30, 2013			December 31, 2012
Derivative assets:
Forward exchange contracts	$	746		$	961
Derivative liabilities:
Forward exchange contracts		(749	)		(1,310	)

Total net derivative (liability) designated as hedging instruments⁽¹⁾	$	(3	)	$	(349	)

(1)

The derivative assets of $746 and derivative liabilities of $749 are classified in other current assets and other current liabilities, respectively, in the consolidated balance sheet as of September 30, 2013. The derivative assets of $961 and derivative liabilities of $1,310 are classified in other current assets and other current liabilities, respectively, in the consolidated balance sheet as of December 31, 2012. These foreign exchange contracts are subject to a master netting agreement with one financial institution. However, the Company has elected to record these contracts on a gross basis in the balance sheet.

The net amount of existing losses as of September 30, 2013 that are expected to be reclassified from accumulated OCI into earnings within the next twelve months is $3.

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


	Three Months Ended September 30,						Nine Months Ended September 30,
Derivatives Designated as Cash Flow Hedging Relationships	2013			2012			2013			2012
Forward exchange contracts:
Net (loss) recognized in OCI⁽¹⁾	$	(1,837	)	$	(581	)	$	(315	)	$	(312	)
Net gain (loss) reclassified from OCI into income⁽²⁾	$	297		$	(739	)	$	1,102		$	(1,178	)
Net (loss) recognized in expense⁽³⁾	$	—		$	(66	)	$	—		$	(66	)

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

(2)	Effective portion classified in cost of products for the three and nine months ended September 30, 2013 and selling, general and administrative expenses for the three and nine months ended September 30, 2012.

(3)	Ineffective portion amount excluded from effectiveness testing which is recorded in selling, general and administrative expenses for the three and nine months ended September 30, 2012.

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


	Three Months Ended September 30,						Nine Months Ended September 30,
Derivatives Not Designated as Hedging Instruments	2013			2012			2013		2012
Forward exchange contracts:
Net (loss) gain recognized in income⁽¹⁾	$	(514	)	$	(552	)	$	141	$	(552	)

(1)	The Company has a forward foreign exchange contract that hedges an intercompany loan with its Korean subsidiary. This hedge does not qualify for hedge accounting and any gains (losses) are recorded immediately in selling, general and administrative expenses.

- Definition

The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.

+ References

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+ Details

Inventories

9 Months Ended

Sep. 30, 2013

Inventory Disclosure [Abstract]

Inventories

6)	Inventories

Inventories consist of the following:


	September 30, 2013		December 31, 2012
Raw materials	$	72,240	$	76,610
Work-in-process		22,145		19,708
Finished goods		41,675		38,321

	$	136,060	$	134,639

Acquisition

9 Months Ended

Sep. 30, 2013

Business Combinations [Abstract]

Acquisition

7)	Acquisition

On March 12, 2013, the Company acquired Alter Power Systems S.r.l. (“Alter”), located in Reggio Emilia, Italy. The aggregate purchase price, net of cash acquired and after final debt and working capital adjustments was $2,426. Total cash paid as of June 30, 2013, net of cash acquired of $21 was $2,058. During June 2013, one of two holdback provisions was met and the Company released $123. The Company will pay the remaining $368 subject to a final holdback provision being met. Alter develops advanced microwave power generators, components and systems for industrial microwave heating, microwave plasma coating and semiconductor applications. This acquisition strengthens the Company’s existing microwave plasma expertise and product portfolio, and extends its opportunity into high growth, non-plasma microwave applications for industrial processes, food and beverage manufacturing and other markets.

The following table summarizes the estimated fair value of the assets acquired and liabilities assumed at the date of the acquisition:


Current assets	$	1,053
Property and equipment		211
Intangible assets		2,806
Other assets		67

Total assets acquired		4,137
Debt (Note 11)		770
Deferred taxes and other liabilities		920

Total liabilities assumed		1,690
Total purchase price		2,447
Cash acquired		(21	)

Total purchase price, net of cash acquired	$	2,426

The intangible assets associated with the acquisition are not deductible for tax purposes. The following table reflects the allocation of the acquired intangible assets and related estimates of useful lives. These acquired intangibles will be amortized on a straight-line basis.

The results of this acquisition were included in the Company’s consolidated operations beginning on March 12, 2013. The pro forma consolidated statements reflecting the operating results of Alter, had it been acquired as of January 1, 2013, would not differ materially from the operating results of the Company as reported for the quarter ended March 31, 2013. Alter is included in the Company’s Power and Reactive Gas Products group and the Advanced Manufacturing Capital Equipment reportable segment.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

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Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6996-128479

+ Details

Goodwill and Intangible Assets

9 Months Ended

Sep. 30, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

8)	Goodwill and Intangible 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. 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.

As of October 31, 2012, the Company performed its annual impairment assessment of goodwill and determined that there was no impairment.

The changes in the carrying amount of goodwill and accumulated impairment (loss) during the nine months ended September, 2013 and twelve months ended December 31, 2012 were as follows:


	2013									2012
	Gross Carrying Amount			Accumulated Impairment (Loss)			Net			Gross Carrying Amount		Accumulated Impairment (Loss)			Net
Beginning balance at January 1	$	290,147		$	(139,414	)	$	150,733		$	279,498	$	(139,414	)	$	140,084
Acquired goodwill⁽¹⁾		—			—			—			9,989		—			9,989
Foreign currency translation		(33	)		—			(33	)		660		—			660

Ending balance at September 30, 2013 and December 31, 2012	$	290,114		$	(139,414	)	$	150,700		$	290,147	$	(139,414	)	$	150,733

(1)	In August 2012, the Company purchased Plasmart, Inc. for $22,607, net of cash acquired. The Company recorded $9,989 of goodwill in connection with the acquisition.

Intangible Assets

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


	Gross		Accumulated Amortization			Foreign Currency Translation		Net
As of September 30, 2013:
Completed technology⁽¹⁾	$	84,680	$	(77,823	)	$	369	$	7,226
Customer relationships		14,571		(9,590	)		281		5,262
Patents, trademarks, trade names and other⁽¹⁾		25,636		(24,840	)		32		828

	$	124,887	$	(112,253	)	$	682	$	13,316

(1)

In August 2013, the Company purchased $268 of net assets of which $388 was completed technology. In March 2013, the Company purchased Alter for $2,426, net of cash acquired. The Company recorded $2,806 of separately identified intangible assets, of which $2,208 was completed technology and $598 was trademarks and trade names.


	Gross		Accumulated Amortization			Foreign Currency Translation		Net
As of December 31, 2012:
Completed technology	$	82,084	$	(77,243	)	$	254	$	5,095
Customer relationships		14,571		(8,886	)		312		5,997
Patents, trademarks, trade names and other		25,038		(24,587	)		18		469

	$	121,693	$	(110,716	)	$	584	$	11,561

Aggregate amortization expense related to acquired intangibles for the three and nine months ended September 30, 2013 were $361 and $1,537, respectively. Aggregate amortization expense related to acquired intangibles for the three and nine months ended September 30, 2012 were $215 and $453, respectively. Estimated amortization expense for each of the remaining fiscal years is as follows:


Year	Amount
2013 (remaining)	$	466
2014		1,768
2015		1,752
2016		1,570
2017		1,541
2018		1,532
Thereafter		4,687

- 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

9 Months Ended

Sep. 30, 2013

Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]

Other Assets

9)	Other Assets


	September 30, 2013		December 31, 2012
Other Current Assets:
Income tax receivable	$	10,684	$	12,768
Other		17,967		15,280

Total other current assets	$	28,651	$	28,048

Other Assets:
Deferred tax assets, net	$	9,828	$	9,497
Long-term income tax receivable		19,411		17,720
Other		1,959		2,195

Total other assets	$	31,198	$	29,412

Other Liabilities

9 Months Ended

Sep. 30, 2013

Other Liabilities Disclosure [Abstract]

Other Liabilities

10)	Other Liabilities


	September 30, 2013		December 31, 2012
Other Current Liabilities:
Product warranties	$	6,732	$	8,266
Deferred revenue		4,599		9,280
Other		24,568		19,859

Total other current liabilities	$	35,899	$	37,405

Other Liabilities:
Long-term income tax payable	$	44,309	$	38,600
Accrued compensation		21,078		18,750
Other		5,004		3,745

Total other liabilities	$	70,391	$	61,095

Debt

9 Months Ended

Sep. 30, 2013

Debt Disclosure [Abstract]

Debt

11)

Debt

The Company’s Japanese subsidiary has lines of credit and short-term borrowing arrangements with two financial institutions which generally expire and are renewed at three month intervals. The lines of credit provide for aggregate borrowings as of September 30, 2013 of up to an equivalent of $23,284 U.S. dollars. One of the borrowing arrangements has an interest rate based on the Tokyo Interbank Offer Rate at the time of borrowing and the other has an interest rate based on the Japanese Short-term Prime Lending Rate. There were no borrowings outstanding under these arrangements at September 30, 2013 and December 31, 2012.

The Company also had various lines of credit and short and long-term borrowing arrangements as a result of its acquisitions of Plasmart, Inc. in 2012 and Alter in March 2013. All of these lines of credit and borrowing arrangements were paid off and terminated in the second quarter of 2013. There were no outstanding balances at September 30, 2013 and December 31, 2012, respectively.

Product Warranties

9 Months Ended

Sep. 30, 2013

Guarantees [Abstract]

Product Warranties

12)	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:


	Nine Months Ended September 30,
	2013			2012
Balance at January 1	$	8,266		$	8,315
Provision for product warranties		1,705			3,750
Direct charges to warranty liability		(3,142	)		(3,733	)
Foreign currency translation		(97	)		505

Balance at September 30	$	6,732		$	8,837

Income Taxes

9 Months Ended

Sep. 30, 2013

Income Tax Disclosure [Abstract]

Income Taxes

13)	Income Taxes

The Company’s effective tax rate for the three and nine months ended September 30, 2013 was 80.4% and 44.8%, respectively. The Company’s effective tax rate for the three and nine months ended September 30, 2012 was 61.3% and 35.7%, respectively. The effective tax rate for the nine months ended September 30, 2013, and related income tax expense was higher than the U.S. statutory tax rate primarily due to a decision made during the quarter ended September 30, 2013 to pay currently, at a substantially reduced rate, taxes on certain accumulated earnings of its Israeli subsidiary relating to calendar year periods 2002-2011 covered under its tax holiday that expired on December 31, 2011. This additional charge was partially offset by additional U.S. tax incentives realized by the Company and recognized as discrete events during the quarter ended September 30, 2013, and the geographic mix of income and profits earned by the Company’s international subsidiaries being taxed at rates lower than the U.S. statutory rate. Additionally, certain tax incentives realized by the Company were recognized as discrete events during the quarter ended March 31, 2013. These incentives were reinstated under The American Taxpayer Relief Act of 2012 that was signed into law on January 2, 2013. The effective tax rate for the nine months ended September 30, 2012, and related income tax expense was higher than the U.S. statutory tax rate primarily due to the cumulative year-to-date tax effect of a slightly higher annual effective tax rate based on the Company’s revised full year forecast, and non-deductible acquisition costs that were offset in part by the geographic mix of income and profits earned by the Company’s international subsidiaries being taxed at rates lower than the U.S. statutory rate.

At September 30, 2013, the total amount of gross unrecognized tax benefits, which excludes interest and penalties, was approximately $45,402. At December 31, 2012, the total amount of gross unrecognized tax benefits, which excludes interest and penalties, was approximately $40,674. The net increase from December 31, 2012 was attributable to an increase in reserves for existing uncertain tax positions. At September 30, 2013, there are $23,570, excluding interest and penalties, of net unrecognized tax benefits that, if recognized, would affect the annual 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 September 30, 2013 and December 31, 2012, the Company had accrued interest on unrecognized tax benefits of approximately $2,147 and $1,571, respectively.

On September 13, 2013, the U.S. Department of the Treasury and Internal Revenue Service released final tangible property regulations that provide guidance on the tax treatment regarding the deduction and capitalization of expenditures related to tangible property. While early adoption is available, the effective date to implement these regulations is for tax years beginning on or after January 1, 2014. The Company is currently assessing these rules and the impact to its financial statements, if any, but believes adoption of these regulations will not have a material impact on its consolidated results of operations, cash flows or financial position.

The Company and its subsidiaries are subject to examination by federal, state and foreign tax authorities. The Internal Revenue Service commenced an examination of the Company’s U.S. federal tax filings for tax years 2007 through 2009 during the quarter ended June 30, 2012. As a result, the U.S. statute of limitations remains open between tax years 2007 through present. The statute of limitations for the Company’s tax filings in other jurisdictions varies between fiscal years 2006 through present.

While the Company believes it has adequately provided for all tax positions, amounts asserted by taxing authorities could materially differ from the Company’s accrued positions as a result of uncertain and complex application of tax regulations. Additionally, the recognition and measurement of certain tax benefits include estimates and judgment by management and inherently includes subjectivity. Accordingly, the Company may record additional provisions or benefits due to U.S. federal, state, and foreign tax-related matters in the future as it revises estimates or settles or otherwise resolves the underlying matters.

Net Income Per Share

9 Months Ended

Sep. 30, 2013

Earnings Per Share [Abstract]

Net Income Per Share

14)	Net Income Per Share

The following table sets forth the computation of basic and diluted net income per share:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2013		2012		2013		2012
Numerator:
Net income	$	2,458	$	2,580	$	15,539	$	43,920

Denominator:
Shares used in net income per common share – basic		53,165,000		52,854,000		52,998,000		52,679,000
Effect of dilutive securities:
Stock options, restricted stock and employee stock purchase plan		348,000		436,000		412,000		561,000

Shares used in net income per common share – diluted		53,513,000		53,290,000		53,410,000		53,240,000

Net income per common share:
Basic	$	0.05	$	0.05	$	0.29	$	0.83
Diluted	$	0.05	$	0.05	$	0.29	$	0.82

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.

As of September 30, 2013, stock options and restricted stock units relating to an aggregate of approximately 1,059,000 shares were outstanding. For the three and nine months ended September 30, 2013, the potential dilutive effect of approximately 104,000 and 101,000 weighted-average shares, respectively, of restricted stock units and stock options were excluded from the computation of diluted weighted-average shares outstanding as the shares would have an anti-dilutive effect on EPS.

As of September 30, 2012, stock options and restricted stock units relating to an aggregate of approximately 1,250,000 shares were outstanding. For the three and nine months ended September 30, 2012, the potential dilutive effect of 105,000 and 227,000 weighted-average shares, respectively, of restricted stock units and stock options were excluded from the computation of diluted weighted-average shares outstanding as the shares would have an anti-dilutive effect on EPS.

Stockholder's Equity

9 Months Ended

Sep. 30, 2013

Equity [Abstract]

Stockholder's Equity

15)	Stockholder’s Equity

Stock Repurchase Program

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 depends 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 the nine months ended September 30, 2013, the Company repurchased 107,000 shares of its common stock for $2,875, or an average price of $26.87 per share. No repurchases occurred during the three months ended September 30, 2013.

Cash 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 the nine months ended September 30, 2013, the Board of Directors authorized three quarterly dividends of $0.16 per share, which totaled $25,458 or $0.48 per share. During the nine months ended September 30, 2012, the Board of Directors declared two quarterly dividends of $0.15 per share and one quarterly dividend of $0.16 per share that totaled $24,261 or $0.46 per share.

On October 28, 2013, our Board of Directors declared a quarterly cash dividend of $0.16 per share to be paid on December 13, 2013 to shareholders of record as of December 2, 2013. 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.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

Reference 1: 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=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 4.E)
-URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644

Reference 5: 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 6: 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=27012166&loc=d3e187143-122770

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 11: 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 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph d
-Article 4

Reference 15: 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 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section E

Reference 17: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Article 4

Reference 18: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section C

Reference 19: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

+ Details

Business Segment, Geographic Area, Product and Significant Customer Information

9 Months Ended

Sep. 30, 2013

Segment Reporting [Abstract]

Business Segment, Geographic Area, Product and Significant Customer Information

16)	Business Segment, Geographic Area, Product and Significant Customer Information

The Company has four reportable segments based upon the manner in which information is produced internally and provided to the Company’s chief operating decision-maker (“CODM”).

The Company develops, manufactures, sells and services products that measure, control, power and monitor critical parameters of advanced manufacturing processes. The Company’s CODM utilizes consolidated financial information to make decisions about allocating resources and assessing performance for the entire Company. In addition, certain disaggregated financial information is also provided to the CODM. Based upon the information provided to the CODM, the Company has determined it has eight operating segments and four reportable segments.

The eight operating segments are PFMC Products, Controls Products, ASTeX Products, ENI Products, HPS Products (Vacuum Products), Analytical Solutions Group, Europe Region Sales & Service and Asia Region Sales & Service.

PFMC Products, Controls Products, ASTeX Products, ENI Products and HPS Products comprise a single reportable segment due to the similarities of the operating segments. This reportable segment, Advanced Manufacturing Capital Equipment, includes the development, manufacturing, sales and servicing of instruments and control products, power and reactive gas products, and vacuum products, all of which are utilized in semiconductor processing and other similar advanced manufacturing processes. Sales in this segment include both external sales and intercompany sales (which are stated at agreed upon transfer prices). External sales of these products made in Europe or Asia are reported as sales in the Europe Region Sales & Service or Asia Region Sales & Service segments.

Analytical Solutions Group, Asia Region Sales & Service and Europe Region Sales & Service are each separate reportable segments. The Company has reported corporate expenses and certain intercompany pricing transactions in a Corporate, Eliminations and Other reconciling column. The Analytical Solutions Group includes gas composition analysis and information technology products. The Europe and Asia region sales and service segments mainly resell and service the Advanced Manufacturing Capital Equipment and Analytical Solutions Group products sold in their respective regions.

MKS derives the segment results directly from the manner in which results are reported in its management reporting system. The accounting policies MKS uses to derive reportable segment results are substantially the same as those used for external reporting purposes except that a substantial portion of the sales of the Advanced Manufacturing Capital Equipment and Analytical Solutions Group segments are intercompany sales to the regions at tax-based transfer prices and certain significant costs, including stock-based compensation and management incentive compensation, are not allocated to the segments and are included in Corporate, Eliminations and Other. The CODM reviews several metrics of each operating segment, including net revenues and gross profit (loss).

The following is net revenues by reportable segment:


	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Advanced Manufacturing Capital Equipment	$	133,307		$	104,191			$363,512			$382,016
Analytical Solutions Group		13,313			15,160			41,217			47,680
Europe Region Sales & Service Operations⁽¹⁾		12,436			13,485			35,287			38,141
Asia Region Sales & Service Operations⁽¹⁾		52,558			46,782			149,267			182,663
Corporate, Eliminations and Other		(45,161	)		(38,171	)		(124,257	)		(140,788	)

	$	166,453		$	141,447			$465,026			$509,712

(1)

The Europe and Asia foreign sales and service operations do not represent total geographical Europe and Asia financial information. These sales and service operations mainly represent the sales from the resale and service of Advanced Manufacturing Capital Equipment and Analytical Solutions Group products in their respective regions. The Advanced Manufacturing Capital Equipment and Analytical Solutions Group segments both have sales in each region. Accordingly, total geographical sales include sales from multiple reportable segments.

The following is gross profit by reportable segment:


	Three Months Ended September 30,					Nine Months Ended September 30,
	2013			2012		2013			2012
Advanced Manufacturing Capital Equipment	$	43,151		$	34,829	$	121,647		$	141,521
Analytical Solutions Group		6,758			8,100		21,239			24,485
Europe Region Sales & Service Operations⁽¹⁾		3,427			3,547		10,005			11,292
Asia Region Sales & Service Operations⁽¹⁾		11,580			9,030		31,366			28,143
Corporate, Eliminations and Other		(2,682	)		1,065		(5,363	)		11,437

	$	62,234		$	56,571	$	178,894		$	216,878

(1)

The following is capital expenditures by reportable segment for the three and nine months ended September 30, 2013 and 2012:


	Product Groups				Foreign Sales & Service Operations
	Advanced Manufacturing Capital Equipment		Analytical Solutions Group		Europe		Asia		Corporate, Eliminations and Other		Total
Three Months Ended September 30, 2013:
Capital expenditures	$	1,893	$	125	$	24	$	239	$	513	$	2,794


Nine Months Ended September 30, 2013:
Capital expenditures	$	6,599	$	265	$	137	$	435	$	1,718	$	9,154


	Product Groups				Foreign Sales & Service Operations
	Advanced Manufacturing Capital Equipment		Analytical Solutions Group		Europe		Asia		Corporate, Eliminations and Other		Total
Three Months Ended September 30, 2012:
Capital expenditures	$	2,102	$	283	$	35	$	237	$	371	$	3,028


Nine Months Ended September 30, 2012:
Capital expenditures	$	6,741	$	698	$	109	$	654	$	2,838	$	11,040

The following is depreciation and amortization by reportable segment for the three and nine months ended September 30, 2013 and 2012:


	Product Groups				Foreign Sales & Service Operations
	Advanced Manufacturing Capital Equipment		Analytical Solutions Group		Europe		Asia		Corporate, Eliminations and Other		Total
Three Months Ended September 30, 2013:
Depreciation and amortization	$	2,861	$	319	$	86	$	294	$	685	$	4,245


Nine Months Ended September 30, 2013:
Depreciation and amortization	$	8,819	$	923	$	260	$	876	$	1,837	$	12,715


	Product Groups				Foreign Sales & Service Operations
	Advanced Manufacturing Capital Equipment		Analytical Solutions Group		Europe		Asia		Corporate, Eliminations and Other		Total
Three Months Ended September 30, 2012:
Depreciation and amortization	$	2,409	$	248	$	102	$	537	$	344	$	3,640


Nine Months Ended September 30, 2012:
Depreciation and amortization	$	6,797	$	715	$	305	$	1,330	$	1,050	$	10,197

The following is segment assets by reportable segment:


	Product Groups				Foreign Sales & Service Operations
	Advanced Manufacturing Capital Equipment		Analytical Solutions Group		Europe		Asia		Corporate, Eliminations and Other			Total
September 30, 2013:
Segment assets:
Accounts receivable⁽¹⁾	$	14,645	$	4,263	$	6,611	$	36,380	$	36,234		$	98,133
Inventory		107,935		4,354		3,950		28,532		(8,711	)		136,060

Total segment assets	$	122,580	$	8,617	$	10,561	$	64,912	$	27,523		$	234,193


	Product Groups				Foreign Sales & Service Operations
	Advanced Manufacturing Capital Equipment		Analytical Solutions Group		Europe		Asia		Corporate, Eliminations and Other			Total
December 31, 2012:
Segment assets:
Accounts receivable⁽¹⁾	$	9,644	$	5,889	$	5,813	$	32,088	$	28,626		$	82,060
Inventory		108,397		3,841		3,691		29,534		(10,824	)		134,639

Total segment assets	$	118,041	$	9,730	$	9,504	$	61,622	$	17,802		$	216,699

(1)	A significant portion of segment receivables are processed at the Company’s shared services center at the Corporate location.

A reconciliation of segment assets to consolidated total assets is as follows:


	September 30, 2013		December 31, 2012
Total segment assets	$	234,193	$	216,699
Cash and cash equivalents and investments		625,837		627,399
Other current assets		38,710		36,242
Property, plant and equipment, net		78,020		80,516
Goodwill and intangible assets, net		164,016		162,294
Other assets		31,198		29,412

Consolidated total assets	$	1,171,974	$	1,152,562

Worldwide Product Information

Because the reportable segment information above does not reflect worldwide sales of the Company’s products, the Company groups its products into four groups of similar products based upon the similarity of product function. Worldwide net revenue for each group of products is as follows:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Instruments and Control Products	$	60,615	$	57,761	$	184,729	$	205,654
Power and Reactive Gas Products		72,471		52,031		182,294		199,864
Vacuum Products		18,098		15,435		53,588		53,158
Analytical Solutions Group Products		15,269		16,220		44,415		51,036

	$	166,453	$	141,447	$	465,026	$	509,712

Sales of Instruments and Control Products, Power and Reactive Gas Products and Vacuum Products are included in the Company’s Advanced Manufacturing Capital Equipment Products segment as well as in the foreign sales and service operations because the products are sold through the foreign sales and service operations in their respective regions. Sales of the Analytical Solutions Group products are included in the Analytical Solutions Group segment as well as in the foreign sales and service operations because the products are sold through the foreign sales and service operations in their respective regions.

Geographic

Information about the Company’s operations in different geographic regions is presented in the tables below. Net revenues 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 revenues.


	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Net revenues:
United States	$	91,286	$	73,775	$	252,704	$	259,954
Korea		16,491		12,574		46,597		54,472
Japan		13,825		14,270		40,243		67,122
Europe		20,433		21,341		57,958		65,800
Asia (excluding Korea and Japan)		24,418		19,487		67,524		62,364

	$	166,453	$	141,447	$	465,026	$	509,712


	September 30, 2013		December 31, 2012
Long-lived assets:⁽¹⁾
United States	$	61,404	$	62,203
Europe		5,175		5,844
Asia		13,398		14,664

	$	79,977	$	82,711

(1)	Long-lived assets include property, plant and equipment, net and certain other long-term assets, excluding long-term income tax receivable.

Major Customers

The Company had two customers with net revenues greater than 10% of total net revenues in the periods shown as follows:


	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Customer A		16.4	%		13.9	%		16.7	%		14.8	%
Customer B		13.5	%		8.5	%		11.8	%		10.3	%

- 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 Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8981-108599

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8971-108599

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8595-108599

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8380-108599

Reference 6: 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

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 26
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8844-108599

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8984-108599

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9031-108599

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9054-108599

Reference 11: 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 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 29
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8864-108599

Reference 13: 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 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599

+ Details

Restructuring

9 Months Ended

Sep. 30, 2013

Restructuring And Related Activities [Abstract]

Restructuring

17)	Restructuring

In the second and third quarters of 2013, the Company initiated restructuring plans to consolidate a small sales office and a small engineering facility to other MKS facilities. The plans included a small reduction in headcount of approximately 27 people.

The Company recorded restructuring charges of $1,126 and $1,364 for the three and nine months ended September 30, 2013, respectively. The restructuring charges were primarily for severance and other charges associated with the reductions in workforce. The restructuring plans are expected to be completed by December 31, 2013.

Commitments and Contingencies

9 Months Ended

Sep. 30, 2013

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

18)	Commitments and Contingencies

In the third quarter of 2012, we incurred $5,316 in charges to settle litigation with former shareholders of one of our former subsidiaries. This litigation was long-standing and the decision to reach a settlement was made to eliminate future legal expenses related to the suit. In the second quarter of 2013, we recovered $1,071 from our insurance company relating to the 2012 litigation settlement.

The Company is subject to various 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.

Recently Issued Accounting Pronouncements (Policies)	9 Months Ended
Recently Issued Accounting Pronouncements (Policies)	Sep. 30, 2013
Accounting Changes And Error Corrections [Abstract]
Offsetting Assets and Liabilities	In December 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2011-11, “Disclosures about Offsetting Assets and Liabilities.” This ASU is intended to enhance the understanding of the effects of netting arrangements on an entity’s financial statements, including financial instruments and derivative instruments that are either offset or subject to a master netting arrangement. The scope of this ASU includes derivatives, sale and repurchase agreements, reverse sale and repurchase agreements, and securities borrowing and lending arrangements. In January 2013, the FASB issued ASU No. 2013-01 “Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities.” This standard provided additional guidance on the scope of ASU No. 2011-11. The provisions of this ASU are effective for interim and annual periods beginning on or after January 1, 2013. The adoption of ASU No. 2011-11 did not have a material effect on the Company’s consolidated financial statements.
Other Comprehensive Income	On February 5, 2013, the FASB issued ASU No. 2013-02, “Other Comprehensive Income (Topic 220: Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income.” This ASU is intended to improve the reporting of reclassifications out of accumulated other comprehensive income by requiring an entity to provide information about the amounts reclassified out of accumulated other comprehensive income by component. In addition, an entity is required to present, either on the face of the statement where net income is presented or in the notes, significant amounts reclassified out of accumulated other comprehensive income, by the respective line items of net income but only if the amount reclassified is required under U.S. GAAP to be reclassified to net income in its entirely in the same reporting period. For other amounts that are not required under U.S. GAAP to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures required under U.S. GAAP that provide additional detail about those amounts. The provisions of this ASU are effective prospectively for interim and annual periods beginning after December 15, 2012. The adoption of ASU No. 2013-12 did not have a material effect on the Company’s consolidated financial statements.
Income Taxes	On July 18, 2013, the FASB issued ASU 2013-11, “Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists.” Under the new standard, unrecognized tax benefits will be netted against all available same-jurisdiction loss or other tax carryforwards that would be utilized, rather than only against carryforwards that are created by unrecognized tax benefits. The provisions of this ASU are effective for interim and annual periods beginning on or after December 15, 2013. The adoption of ASU No. 2013-11 is not expected to have a material effect on the Company’s consolidated financial statements.

- Definition

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.

+ References + Details

Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

Revisions in the Balance Sheet Line Items

The tables below reflect the revisions in the balance sheet line items for the periods ended December 31, 2012 and 2011.


	December 31, 2012
	As previously reported		Adjustment		As revised
Other assets	$	11,692	$	17,720	$	29,412
Other liabilities	$	43,375	$	17,720	$	61,095


	December 31, 2011
	As previously reported		Adjustment		As revised
Other assets	$	12,266	$	15,281	$	27,547
Other liabilities	$	32,211	$	15,281	$	47,492

Revision of Other Assets and Other Liabilities

The tables below reflect the sections in certain footnotes that were affected by the revision for the periods ended December 31, 2012 and 2011.

Other Assets


	December 31, 2012
	As previously reported		Adjustment		As revised
Deferred tax assets, net	$	9,497	$	—	$	9,497
Long-term income tax receivable		—		17,720		17,720
Other		2,195		—		2,195

	$	11,692	$	17,720	$	29,412


	December 31, 2011
	As previously reported		Adjustment		As revised
Deferred tax assets, net	$	10,274	$	—	$	10,274
Long-term income tax receivable		—		15,281		15,281
Other		1,992		—		1,992

	$	12,266	$	15,281	$	27,547

Other Liabilities


	December 31, 2012
	As previously reported		Adjustment		As revised
Long-term income tax payable	$	20,880	$	17,720	$	38,600
Accrued compensation		18,750		—		18,750
Other		3,745		—		3,745

	$	43,375	$	17,720	$	61,095


	December 31, 2011
	As previously reported		Adjustment		As revised
Long-term income tax payable	$	16,084	$	15,281	$	31,365
Accrued compensation		15,174		—		15,174
Other		953		—		953

	$	32,211	$	15,281	$	47,492

Revision of Income Taxes

Income Taxes


	December 31, 2012
	As previously reported		Adjustment			As revised
Current taxes:
United States	$	10,431	$	4,314		$	14,745
State		783		—			783
Foreign		12,074		(4,314	)		7,760

	$	23,288	$	—		$	23,288


	December 31, 2011
	As previously reported		Adjustment			As revised
Current taxes:
United States	$	25,824	$	15,032		$	40,856
State		2,602		—			2,602
Foreign		20,346		(15,032	)		5,314

	$	48,772	$	—		$	48,772


	December 31, 2010
	As previously reported		Adjustment			As revised
Current taxes:
United States	$	27,789	$	8,807		$	36,596
State		3,323		—			3,323
Foreign		22,296		(8,807	)		13,489

	$	53,408	$	—		$	53,408

Reconciliation of Segment Assets to Consolidated Total Assets

A reconciliation of segment assets to consolidated total assets is as follows:


	December 31, 2012
	As previously reported		Adjustment		As revised
Total segment assets	$	216,699	$	—	$	216,699
Cash and cash equivalents and investments		627,399		—		627,399
Other current assets		36,242		—		36,242
Property, plant and equipment, net		80,516		—		80,516
Goodwill and intangible assets, net		162,294		—		162,294
Other assets		11,692		17,720		29,412

Consolidated total assets	$	1,134,842	$	17,720	$	1,152,562


	December 31, 2011
	As previously reported		Adjustment		As revised
Total segment assets	$	274,526	$	—	$	274,526
Cash and cash equivalents and investments		573,392		—		573,392
Other current assets		44,856		—		44,856
Property, plant and equipment, net		72,487		—		72,487
Goodwill and intangible assets, net		141,127		—		141,127
Other assets		12,266		15,281		27,547

Consolidated total assets	$	1,118,654	$	15,281	$	1,133,935

Investments (Tables)

9 Months Ended

Sep. 30, 2013

Investments Debt And Equity Securities [Abstract]

Fair Value of Available for Sale and Trading Investments

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


	September 30, 2013		December 31, 2012
Available-for-sale investments:
Bankers’ acceptance drafts	$	330	$	242
Time deposits		77,577		52
Commercial paper and corporate obligations		81,308		—
U.S. treasury obligations		—		13,054
U.S. agency obligations		205,702		313,514

		364,917		326,862
Trading investments:
Mutual funds		959		791

	$	365,876	$	327,653

Fair Value of Long-Term Available-for-Sale Investments

The fair value of long-term investments with maturities of more than one year consists of the following:


	September 30, 2013		December 31, 2012
Available-for-sale investments:
Time deposits	$	56	$	—
U.S. agency obligations		5,127		12,158

	$	5,183	$	12,158

Gross Unrealized Gains and (Losses) Aggregated by Investment Category Short-Term and Long-Term Securities

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


As of September 30, 2013:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Short-term investments:
Bankers’ acceptance drafts	$	330	$	—	$	—		$	330
Time deposits		77,575		5		(3	)		77,577
Commercial paper and corporate obligations		81,300		10		(2	)		81,308
U.S. agency obligations		205,639		63		—			205,702

	$	364,844	$	78	$	(5	)	$	364,917

Long-term investments:
Time deposits	$	56	$	—	$	—		$	56
U.S. agency obligations		5,122		5		—			5,127

U.S. agency obligations	$	5,178	$	5	$	—		$	5,183


As of December 31, 2012:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Short-term investments:
Time deposits	$	52	$	—	$	—		$	52
Bankers’ acceptance drafts		242		—		—			242
U.S. treasury obligations		13,045		9		—			13,054
U.S. agency obligations		313,262		258		(6	)		313,514

	$	326,601	$	267	$	(6	)	$	326,862

Long-term investments:
U.S. agency obligations	$	12,156	$	2	$	—		$	12,158

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References + Details

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis

Assets and liabilities of the Company are measured at fair value on a recurring basis as of September 30, 2013 and are summarized as follows:


			Fair Value Measurements at Reporting Date Using
Description	Total September 30, 2013		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	$	57,982	$	57,982	$	—	$	—
Trading securities:
Mutual funds		959		959		—		—
Available-for-sale securities:
Bankers’ acceptance drafts		330		—		330		—
Time deposits		77,633		—		77,633		—
Commercial paper and corporate obligations		81,308		—		81,308		—
U.S. agency obligations		210,829		195,275		15,554		—
Derivatives – currency forward contracts		746		—		746		—

Total assets	$	429,787	$	254,216	$	175,571	$	—

Liabilities:
Derivatives – currency forward contracts	$	749	$	—	$	749	$	—


Reported as follows:
Assets:
Cash and cash equivalents⁽¹⁾	$	57,982	$	57,982	$	—	$	—
Short-term investments		365,876		191,107		174,769		—
Other current assets		746		—		746		—

Total current assets	$	424,604	$	249,089	$	175,515	$	—

Long-term investments	$	5,183	$	5,127	$	56	$	—

Liabilities:
Other current liabilities	$	749	$	—	$	749	$	—

(1)	The cash and cash equivalent amounts presented in the table above do not include cash of $192,396 and non-negotiable time deposits of $4,400 as of September 30, 2013.

Assets and liabilities of the Company are measured at fair value on a recurring basis as of December 31, 2012 and are summarized as follows:


			Fair Value Measurements at Reporting Date Using
Description	Total December 31, 2012		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	$	51,291	$	51,291	$	—	$	—
Bankers acceptance drafts		16		—		16		—
Trading securities:
Mutual funds		791		791		—		—
Available-for-sale securities:
Bankers’ acceptance drafts		242		—		242		—
U.S. treasury obligations		13,054		—		13,054		—
U.S. agency obligations		325,672		295,665		30,007		—
Derivatives – currency forward contracts		961		—		961		—

Total assets	$	392,027	$	347,747	$	44,280	$	—

Liabilities:
Derivatives – currency forward contracts	$	1,310	$	—	$	1,310	$	—

Reported as follows:
Assets:
Cash and cash equivalents⁽¹⁾	$	51,307	$	51,291	$	16	$	—
Short-term investments⁽²⁾		327,601		284,298		43,303		—
Other current assets		961		—		961		—

Total current assets	$	379,869	$	335,589	$	44,280	$	—

Long-term investments	$	12,158	$	12,158	$	—	$	—

Liabilities:
Other current liabilities	$	1,310	$	—	$	1,310	$	—

(1)	The cash and cash equivalent amounts presented in the table above do not include cash of $185,143 and non-negotiable time deposits of $51,138 as of December 31, 2012.

(2)	The short-term investments presented in the table above do not include non-negotiable time deposits of $52 as of December 31, 2012.

Derivatives (Tables)

9 Months Ended

Sep. 30, 2013

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Summary of Primary Net Hedging Positions and Corresponding Fair Values

The following tables provide a summary of the primary net hedging positions and corresponding fair values held as of September 30, 2013 and December 31, 2012:


	September 30, 2013
Currency Hedged (Buy/Sell)	Gross Notional Value		F air Value⁽¹⁾ Asset/(Liability)
U.S. Dollar/Japanese Yen	$	11,763	$	746
U.S. Dollar/South Korean Won		18,081		(636	)
U.S. Dollar/Euro		4,241		(76	)
U.S. Dollar/U.K. Pound Sterling		2,444		(37	)

Total	$	36,529	$	(3	)

(1)	Represents the fair value of the net asset / (liability) amount included in the consolidated balance sheets.


	December 31, 2012
Currency Hedged (Buy/Sell)	Gross Notional Value		Fair Value⁽¹⁾ Asset/(Liability)
U.S. Dollar/Japanese Yen	$	13,992	$	961
U.S. Dollar/South Korean Won		19,374		(1,180	)
U.S. Dollar/Euro		4,217		(57	)
U.S. Dollar/U.K. Pound Sterling		3,865		(73	)

Total	$	41,448	$	(349	)

(1)	Represents the fair value of the net asset / (liability) amount included in the consolidated balance sheets.

Summary of Fair Value Amounts of Company's Derivative Instruments

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


Derivatives Designated as Hedging Instruments	September 30, 2013			December 31, 2012
Derivative assets:
Forward exchange contracts	$	746		$	961
Derivative liabilities:
Forward exchange contracts		(749	)		(1,310	)

Total net derivative (liability) designated as hedging instruments⁽¹⁾	$	(3	)	$	(349	)

(1)

Summary of Gains (Losses) on Derivatives Designated as Hedging Instruments

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


	Three Months Ended September 30,						Nine Months Ended September 30,
Derivatives Designated as Cash Flow Hedging Relationships	2013			2012			2013			2012
Forward exchange contracts:
Net (loss) recognized in OCI⁽¹⁾	$	(1,837	)	$	(581	)	$	(315	)	$	(312	)
Net gain (loss) reclassified from OCI into income⁽²⁾	$	297		$	(739	)	$	1,102		$	(1,178	)
Net (loss) recognized in expense⁽³⁾	$	—		$	(66	)	$	—		$	(66	)

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

(2)	Effective portion classified in cost of products for the three and nine months ended September 30, 2013 and selling, general and administrative expenses for the three and nine months ended September 30, 2012.

(3)	Ineffective portion amount excluded from effectiveness testing which is recorded in selling, general and administrative expenses for the three and nine months ended September 30, 2012.

Summary of Gains on Derivatives Not Designated as Hedging Instruments

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


	Three Months Ended September 30,						Nine Months Ended September 30,
Derivatives Not Designated as Hedging Instruments	2013			2012			2013		2012
Forward exchange contracts:
Net (loss) gain recognized in income⁽¹⁾	$	(514	)	$	(552	)	$	141	$	(552	)

(1)	The Company has a forward foreign exchange contract that hedges an intercompany loan with its Korean subsidiary. This hedge does not qualify for hedge accounting and any gains (losses) are recorded immediately in selling, general and administrative expenses.

- 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 5
-URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41641-113959

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=7476318&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 8
-URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41678-113959

Reference 4: 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=7476318&loc=d3e41638-113959

Reference 5: 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=7476318&loc=SL5580258-113959

Reference 6: 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=7476318&loc=SL5579245-113959

Reference 7: 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=7476318&loc=SL5624171-113959

Reference 8: 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

Reference 9: 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=7476318&loc=SL5579240-113959

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=7476318&loc=d3e41620-113959

Reference 11: 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=26873400&loc=d3e23780-122690

+ Details

Inventories (Tables)

9 Months Ended

Sep. 30, 2013

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories consist of the following:


	September 30, 2013		December 31, 2012
Raw materials	$	72,240	$	76,610
Work-in-process		22,145		19,708
Finished goods		41,675		38,321

	$	136,060	$	134,639

Acquisition (Tables)

9 Months Ended

Sep. 30, 2013

Business Combinations [Abstract]

Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed

The following table summarizes the estimated fair value of the assets acquired and liabilities assumed at the date of the acquisition:


Current assets	$	1,053
Property and equipment		211
Intangible assets		2,806
Other assets		67

Total assets acquired		4,137
Debt (Note 11)		770
Deferred taxes and other liabilities		920

Total liabilities assumed		1,690
Total purchase price		2,447
Cash acquired		(21	)

Total purchase price, net of cash acquired	$	2,426

Allocation of Acquired Intangible Assets and Related Estimates of Useful Lives

The following table reflects the allocation of the acquired intangible assets and related estimates of useful lives. These acquired intangibles will be amortized on a straight-line basis.

Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill

The changes in the carrying amount of goodwill and accumulated impairment (loss) during the nine months ended September, 2013 and twelve months ended December 31, 2012 were as follows:


	2013									2012
	Gross Carrying Amount			Accumulated Impairment (Loss)			Net			Gross Carrying Amount		Accumulated Impairment (Loss)			Net
Beginning balance at January 1	$	290,147		$	(139,414	)	$	150,733		$	279,498	$	(139,414	)	$	140,084
Acquired goodwill⁽¹⁾		—			—			—			9,989		—			9,989
Foreign currency translation		(33	)		—			(33	)		660		—			660

Ending balance at September 30, 2013 and December 31, 2012	$	290,114		$	(139,414	)	$	150,700		$	290,147	$	(139,414	)	$	150,733

(1)	In August 2012, the Company purchased Plasmart, Inc. for $22,607, net of cash acquired. The Company recorded $9,989 of goodwill in connection with the acquisition.

Intangible Assets

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


	Gross		Accumulated Amortization			Foreign Currency Translation		Net
As of September 30, 2013:
Completed technology⁽¹⁾	$	84,680	$	(77,823	)	$	369	$	7,226
Customer relationships		14,571		(9,590	)		281		5,262
Patents, trademarks, trade names and other⁽¹⁾		25,636		(24,840	)		32		828

	$	124,887	$	(112,253	)	$	682	$	13,316

(1)


	Gross		Accumulated Amortization			Foreign Currency Translation		Net
As of December 31, 2012:
Completed technology	$	82,084	$	(77,243	)	$	254	$	5,095
Customer relationships		14,571		(8,886	)		312		5,997
Patents, trademarks, trade names and other		25,038		(24,587	)		18		469

	$	121,693	$	(110,716	)	$	584	$	11,561

Estimated Amortization Expense

nine months ended September 30, 2012 were $215 and $453, respectively. Estimated amortization expense for each of the remaining fiscal years is as follows:


Year	Amount
2013 (remaining)	$	466
2014		1,768
2015		1,752
2016		1,570
2017		1,541
2018		1,532
Thereafter		4,687

Other Assets (Tables)

9 Months Ended

Sep. 30, 2013

Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]

Schedule of Other Assets


	September 30, 2013		December 31, 2012
Other Current Assets:
Income tax receivable	$	10,684	$	12,768
Other		17,967		15,280

Total other current assets	$	28,651	$	28,048

Other Assets:
Deferred tax assets, net	$	9,828	$	9,497
Long-term income tax receivable		19,411		17,720
Other		1,959		2,195

Total other assets	$	31,198	$	29,412

Other Liabilities (Tables)

9 Months Ended

Sep. 30, 2013

Other Liabilities Disclosure [Abstract]

Schedule of Other Liabilities


	September 30, 2013		December 31, 2012
Other Current Liabilities:
Product warranties	$	6,732	$	8,266
Deferred revenue		4,599		9,280
Other		24,568		19,859

Total other current liabilities	$	35,899	$	37,405

Other Liabilities:
Long-term income tax payable	$	44,309	$	38,600
Accrued compensation		21,078		18,750
Other		5,004		3,745

Total other liabilities	$	70,391	$	61,095

Product Warranties (Tables)

9 Months Ended

Sep. 30, 2013

Guarantees [Abstract]

Product Warranties

Product warranty activities were as follows:


	Nine Months Ended September 30,
	2013			2012
Balance at January 1	$	8,266		$	8,315
Provision for product warranties		1,705			3,750
Direct charges to warranty liability		(3,142	)		(3,733	)
Foreign currency translation		(97	)		505

Balance at September 30	$	6,732		$	8,837

Net Income Per Share (Tables)

9 Months Ended

Sep. 30, 2013

Earnings Per Share [Abstract]

Computation of Basic and Diluted Net Income Per Share

The following table sets forth the computation of basic and diluted net income per share:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2013		2012		2013		2012
Numerator:
Net income	$	2,458	$	2,580	$	15,539	$	43,920

Denominator:
Shares used in net income per common share – basic		53,165,000		52,854,000		52,998,000		52,679,000
Effect of dilutive securities:
Stock options, restricted stock and employee stock purchase plan		348,000		436,000		412,000		561,000

Shares used in net income per common share – diluted		53,513,000		53,290,000		53,410,000		53,240,000

Net income per common share:
Basic	$	0.05	$	0.05	$	0.29	$	0.83
Diluted	$	0.05	$	0.05	$	0.29	$	0.82

Business Segment, Geographic Area, Product and Significant Customer Information (Tables)

9 Months Ended

Sep. 30, 2013

Segment Reporting [Abstract]

Net Revenues by Reportable Segment

The following is net revenues by reportable segment:


	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Advanced Manufacturing Capital Equipment	$	133,307		$	104,191			$363,512			$382,016
Analytical Solutions Group		13,313			15,160			41,217			47,680
Europe Region Sales & Service Operations⁽¹⁾		12,436			13,485			35,287			38,141
Asia Region Sales & Service Operations⁽¹⁾		52,558			46,782			149,267			182,663
Corporate, Eliminations and Other		(45,161	)		(38,171	)		(124,257	)		(140,788	)

	$	166,453		$	141,447			$465,026			$509,712

(1)

Schedule of Gross Profit (Loss) by Reportable Segment

The following is gross profit by reportable segment:


	Three Months Ended September 30,					Nine Months Ended September 30,
	2013			2012		2013			2012
Advanced Manufacturing Capital Equipment	$	43,151		$	34,829	$	121,647		$	141,521
Analytical Solutions Group		6,758			8,100		21,239			24,485
Europe Region Sales & Service Operations⁽¹⁾		3,427			3,547		10,005			11,292
Asia Region Sales & Service Operations⁽¹⁾		11,580			9,030		31,366			28,143
Corporate, Eliminations and Other		(2,682	)		1,065		(5,363	)		11,437

	$	62,234		$	56,571	$	178,894		$	216,878

(1)

Schedule of Capital Expenditures, Depreciation and Amortization Expense and Segment Assets by Reportable Segment

The following is capital expenditures by reportable segment for the three and nine months ended September 30, 2013 and 2012:


	Product Groups				Foreign Sales & Service Operations
	Advanced Manufacturing Capital Equipment		Analytical Solutions Group		Europe		Asia		Corporate, Eliminations and Other		Total
Three Months Ended September 30, 2013:
Capital expenditures	$	1,893	$	125	$	24	$	239	$	513	$	2,794


Nine Months Ended September 30, 2013:
Capital expenditures	$	6,599	$	265	$	137	$	435	$	1,718	$	9,154


	Product Groups				Foreign Sales & Service Operations
	Advanced Manufacturing Capital Equipment		Analytical Solutions Group		Europe		Asia		Corporate, Eliminations and Other		Total
Three Months Ended September 30, 2012:
Capital expenditures	$	2,102	$	283	$	35	$	237	$	371	$	3,028


Nine Months Ended September 30, 2012:
Capital expenditures	$	6,741	$	698	$	109	$	654	$	2,838	$	11,040

The following is depreciation and amortization by reportable segment for the three and nine months ended September 30, 2013 and 2012:


	Product Groups				Foreign Sales & Service Operations
	Advanced Manufacturing Capital Equipment		Analytical Solutions Group		Europe		Asia		Corporate, Eliminations and Other		Total
Three Months Ended September 30, 2013:
Depreciation and amortization	$	2,861	$	319	$	86	$	294	$	685	$	4,245


Nine Months Ended September 30, 2013:
Depreciation and amortization	$	8,819	$	923	$	260	$	876	$	1,837	$	12,715


	Product Groups				Foreign Sales & Service Operations
	Advanced Manufacturing Capital Equipment		Analytical Solutions Group		Europe		Asia		Corporate, Eliminations and Other		Total
Three Months Ended September 30, 2012:
Depreciation and amortization	$	2,409	$	248	$	102	$	537	$	344	$	3,640


Nine Months Ended September 30, 2012:
Depreciation and amortization	$	6,797	$	715	$	305	$	1,330	$	1,050	$	10,197

The following is segment assets by reportable segment:


	Product Groups				Foreign Sales & Service Operations
	Advanced Manufacturing Capital Equipment		Analytical Solutions Group		Europe		Asia		Corporate, Eliminations and Other			Total
September 30, 2013:
Segment assets:
Accounts receivable⁽¹⁾	$	14,645	$	4,263	$	6,611	$	36,380	$	36,234		$	98,133
Inventory		107,935		4,354		3,950		28,532		(8,711	)		136,060

Total segment assets	$	122,580	$	8,617	$	10,561	$	64,912	$	27,523		$	234,193


	Product Groups				Foreign Sales & Service Operations
	Advanced Manufacturing Capital Equipment		Analytical Solutions Group		Europe		Asia		Corporate, Eliminations and Other			Total
December 31, 2012:
Segment assets:
Accounts receivable⁽¹⁾	$	9,644	$	5,889	$	5,813	$	32,088	$	28,626		$	82,060
Inventory		108,397		3,841		3,691		29,534		(10,824	)		134,639

Total segment assets	$	118,041	$	9,730	$	9,504	$	61,622	$	17,802		$	216,699

(1)	A significant portion of segment receivables are processed at the Company’s shared services center at the Corporate location.

Reconciliation of Segment Assets to Consolidated Total Assets

A reconciliation of segment assets to consolidated total assets is as follows:


	September 30, 2013		December 31, 2012
Total segment assets	$	234,193	$	216,699
Cash and cash equivalents and investments		625,837		627,399
Other current assets		38,710		36,242
Property, plant and equipment, net		78,020		80,516
Goodwill and intangible assets, net		164,016		162,294
Other assets		31,198		29,412

Consolidated total assets	$	1,171,974	$	1,152,562

Worldwide Net Revenue for Each Group of Products

Worldwide net revenue for each group of products is as follows:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Instruments and Control Products	$	60,615	$	57,761	$	184,729	$	205,654
Power and Reactive Gas Products		72,471		52,031		182,294		199,864
Vacuum Products		18,098		15,435		53,588		53,158
Analytical Solutions Group Products		15,269		16,220		44,415		51,036

	$	166,453	$	141,447	$	465,026	$	509,712

Company Long-Lived Assets in Different Geographic Regions

Transfers between geographic areas are at negotiated transfer prices and have been eliminated from consolidated net revenues.


	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Net revenues:
United States	$	91,286	$	73,775	$	252,704	$	259,954
Korea		16,491		12,574		46,597		54,472
Japan		13,825		14,270		40,243		67,122
Europe		20,433		21,341		57,958		65,800
Asia (excluding Korea and Japan)		24,418		19,487		67,524		62,364

	$	166,453	$	141,447	$	465,026	$	509,712


	September 30, 2013		December 31, 2012
Long-lived assets:⁽¹⁾
United States	$	61,404	$	62,203
Europe		5,175		5,844
Asia		13,398		14,664

	$	79,977	$	82,711

(1)	Long-lived assets include property, plant and equipment, net and certain other long-term assets, excluding long-term income tax receivable.

Customers With Net Revenues Greater Than 10% of Total Net Revenues

The Company had two customers with net revenues greater than 10% of total net revenues in the periods shown as follows:


	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Customer A		16.4	%		13.9	%		16.7	%		14.8	%
Customer B		13.5	%		8.5	%		11.8	%		10.3	%

Basis of Presentation - Revisions in the Balance Sheet Line Items (Detail) - USD ($) $ in Thousands	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Revised Financial Statement [Line Items]
Other assets	$ 31,198	$ 29,412	$ 27,547
Other liabilities	$ 70,391	61,095	47,492
As Previously Reported [Member]
Schedule Of Revised Financial Statement [Line Items]
Other assets		11,692	12,266
Other liabilities		43,375	32,211
Adjustment [Member]
Schedule Of Revised Financial Statement [Line Items]
Other assets		17,720	15,281
Other liabilities		$ 17,720	$ 15,281

Basis of Presentation - Revision of Other Assets and Other Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Revised Financial Statement [Line Items]
Deferred tax assets, net	$ 9,828	$ 9,497	$ 10,274
Long-term income tax receivable	19,411	17,720	15,281
Other	1,959	2,195	1,992
Total other assets	31,198	29,412	27,547
Long-term income tax payable	44,309	38,600	31,365
Accrued compensation	21,078	18,750	15,174
Other	5,004	3,745	953
Total other liabilities	$ 70,391	61,095	47,492
As Previously Reported [Member]
Schedule Of Revised Financial Statement [Line Items]
Deferred tax assets, net		9,497	10,274
Other		2,195	1,992
Total other assets		11,692	12,266
Long-term income tax payable		20,880	16,084
Accrued compensation		18,750	15,174
Other		3,745	953
Total other liabilities		43,375	32,211
Adjustment [Member]
Schedule Of Revised Financial Statement [Line Items]
Long-term income tax receivable		17,720	15,281
Total other assets		17,720	15,281
Long-term income tax payable		17,720	15,281
Total other liabilities		$ 17,720	$ 15,281

Basis of Presentation - Revision of Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current taxes:
United States	$ 14,745	$ 40,856	$ 36,596
State	783	2,602	3,323
Foreign	7,760	5,314	13,489
Current taxes, Total	23,288	48,772	53,408
As Previously Reported [Member]
Current taxes:
United States	10,431	25,824	27,789
State	783	2,602	3,323
Foreign	12,074	20,346	22,296
Current taxes, Total	23,288	48,772	53,408
Adjustment [Member]
Current taxes:
United States	4,314	15,032	8,807
Foreign	$ (4,314)	$ (15,032)	$ (8,807)

Basis of Presentation - Reconciliation of Segment Assets to Consolidated Total Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Total segment assets	$ 234,193	$ 216,699	$ 274,526
Cash and cash equivalents and investments	625,837	627,399	573,392
Other current assets	38,710	36,242	44,856
Property, plant and equipment, net	78,020	80,516	72,487
Goodwill and intangible assets, net	164,016	162,294	141,127
Other assets	31,198	29,412	27,547
Total assets	$ 1,171,974	1,152,562	1,133,935
As Previously Reported [Member]
Segment Reporting Information [Line Items]
Total segment assets		216,699	274,526
Cash and cash equivalents and investments		627,399	573,392
Other current assets		36,242	44,856
Property, plant and equipment, net		80,516	72,487
Goodwill and intangible assets, net		162,294	141,127
Other assets		11,692	12,266
Total assets		1,134,842	1,118,654
Adjustment [Member]
Segment Reporting Information [Line Items]
Other assets		17,720	15,281
Total assets		$ 17,720	$ 15,281

Investments - Schedule of Fair Value of Available for Sale of Investments (Detail) - USD ($) $ in Thousands	Sep. 30, 2013	Dec. 31, 2012
Schedule Of Available For Sale And Trading Securities [Line Items]
Fair value of short-term available-for-sale investments	$ 364,917	$ 326,862
Fair value of short-term investments	365,876	327,653
Fair value of long-term available-for-sale investments	5,183	12,158
Bankers' Acceptance Drafts [Member]
Schedule Of Available For Sale And Trading Securities [Line Items]
Fair value of short-term available-for-sale investments	330	242
Time Deposits [Member]
Schedule Of Available For Sale And Trading Securities [Line Items]
Fair value of short-term available-for-sale investments	77,577	52
Fair value of long-term available-for-sale investments	56
Commercial Paper and Corporate Obligations [Member]
Schedule Of Available For Sale And Trading Securities [Line Items]
Fair value of short-term available-for-sale investments	81,308
U.S. Treasury Obligations [Member]
Schedule Of Available For Sale And Trading Securities [Line Items]
Fair value of short-term available-for-sale investments		13,054
U.S. Agency Obligations [Member]
Schedule Of Available For Sale And Trading Securities [Line Items]
Fair value of short-term available-for-sale investments	205,702	313,514
Fair value of long-term available-for-sale investments	5,127	12,158
Mutual Funds [Member]
Schedule Of Available For Sale And Trading Securities [Line Items]
Fair value of short-term investments, mutual funds	$ 959	$ 791

Investments - Gross Unrealized Gains and (Losses) Aggregated by Investment Category Short-Term and Long-Term Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Short-term investments, Estimated Fair Value	$ 364,917	$ 326,862
Long-term investments, Estimated Fair Value	5,183	12,158
Short Term [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	364,844	326,601
Investments, Gross Unrealized Gains	78	267
Investments, Gross Unrealized (Losses)	(5)	(6)
Long Term [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	5,178
Investments, Gross Unrealized Gains	5
Investments, Gross Unrealized (Losses)
Bankers' Acceptance Drafts [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments, Estimated Fair Value	330	242
Bankers' Acceptance Drafts [Member] \| Short Term [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	330	242
Investments, Gross Unrealized Gains
Investments, Gross Unrealized (Losses)
Time Deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments, Estimated Fair Value	77,577	52
Long-term investments, Estimated Fair Value	56
Time Deposits [Member] \| Short Term [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	77,575	52
Investments, Gross Unrealized Gains	5
Investments, Gross Unrealized (Losses)	(3)
Time Deposits [Member] \| Long Term [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	56
Investments, Gross Unrealized Gains
Investments, Gross Unrealized (Losses)
Commercial Paper and Corporate Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments, Estimated Fair Value	81,308
Commercial Paper and Corporate Obligations [Member] \| Short Term [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	81,300
Investments, Gross Unrealized Gains	10
Investments, Gross Unrealized (Losses)	(2)
U.S. Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments, Estimated Fair Value	205,702	313,514
Long-term investments, Estimated Fair Value	5,127	12,158
U.S. Agency Obligations [Member] \| Short Term [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	205,639	313,262
Investments, Gross Unrealized Gains	63	258
Investments, Gross Unrealized (Losses)		(6)
U.S. Agency Obligations [Member] \| Long Term [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	5,122	12,156
Investments, Gross Unrealized Gains	5	2
Investments, Gross Unrealized (Losses)
U.S. Treasury Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments, Estimated Fair Value		13,054
U.S. Treasury Obligations [Member] \| Short Term [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost		13,045
Investments, Gross Unrealized Gains		9
Investments, Gross Unrealized (Losses)

Fair Value Measurements - Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Derivatives - currency forward contracts	$ 746	$ 961
Liabilities Derivatives - currency forward contracts	749	1,310
Long-term investments	5,183	12,158
Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	57,982	51,307
Assets Derivatives - currency forward contracts	746	961
Total assets	429,787	392,027
Liabilities Derivatives - currency forward contracts	749	1,310
Short-term investments	365,876	327,601
Total current assets	424,604	379,869
Long-term investments	5,183	12,158
Other current liabilities	749	1,310
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	57,982	51,291
Assets Derivatives - currency forward contracts
Total assets	254,216	347,747
Liabilities Derivatives - currency forward contracts
Short-term investments	191,107	284,298
Total current assets	249,089	335,589
Long-term investments	5,127	12,158
Other current liabilities
Significant Other Observable Inputs (Level 2) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents		16
Assets Derivatives - currency forward contracts	746	961
Total assets	175,571	44,280
Liabilities Derivatives - currency forward contracts	749	1,310
Short-term investments	174,769	43,303
Total current assets	175,515	44,280
Long-term investments	56
Other current liabilities	749	1,310
Significant Unobservable Inputs (Level 3) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents
Assets Derivatives - currency forward contracts
Total assets
Liabilities Derivatives - currency forward contracts
Short-term investments
Total current assets
Long-term investments
Other current liabilities
Money Market Funds [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	57,982	51,291
Money Market Funds [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	57,982	51,291
Money Market Funds [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents
Money Market Funds [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents
Bankers' Acceptance Drafts [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents		16
Available-for-sale securities	330	242
Bankers' Acceptance Drafts [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents
Available-for-sale securities
Bankers' Acceptance Drafts [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents		16
Available-for-sale securities	330	242
Bankers' Acceptance Drafts [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents
Available-for-sale securities
Mutual Funds [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual funds	959	791
Mutual Funds [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual funds	959	791
Mutual Funds [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual funds
Mutual Funds [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual funds
U.S. Treasury Obligations [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		13,054
U.S. Treasury Obligations [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities
U.S. Treasury Obligations [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		13,054
U.S. Treasury Obligations [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities
U.S. Agency Obligations [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	210,829	325,672
U.S. Agency Obligations [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	195,275	295,665
U.S. Agency Obligations [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	15,554	30,007
U.S. Agency Obligations [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities
Other Current Assets [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Derivatives - currency forward contracts	746	961
Other Current Assets [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Derivatives - currency forward contracts
Other Current Assets [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Derivatives - currency forward contracts	746	961
Other Current Assets [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Derivatives - currency forward contracts
Time Deposits [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	77,633
Time Deposits [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities
Time Deposits [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	77,633
Time Deposits [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities
Commercial Paper and Corporate Obligations [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	81,308
Commercial Paper and Corporate Obligations [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities
Commercial Paper and Corporate Obligations [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	81,308
Commercial Paper and Corporate Obligations [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities

Fair Value Measurements - Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis (Parenthetical) (Detail) - USD ($) $ in Thousands	Sep. 30, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	$ 364,917	$ 326,862
Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Not included in cash and cash equivalent amount	4,400	51,138
Short-term investments		52
Cash [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Not included in cash and cash equivalent amount	$ 192,396	$ 185,143

Derivatives - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Derivative Instruments and Hedging Activities Disclosures [Line Items]
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	$ 36,529	$ 41,448
Fair value asset / (liability)	(3)
Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross notional values of outstanding forward foreign exchange contracts	$ 36,529	$ 41,448

Derivatives - Summary of Primary Net Hedging Positions and Corresponding Fair Values (Detail) - USD ($) $ in Thousands	Sep. 30, 2013	Dec. 31, 2012
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	$ 36,529	$ 41,448
Currency Hedged (Buy/Sell), Fair Value, Asset/(Liability), Net	(3)	(349)
U.S. Dollar/Japanese Yen [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	11,763	13,992
Currency Hedged (Buy/Sell), Fair Value, Asset/(Liability), Net	746	961
U.S. Dollar/South Korean Won [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	18,081	19,374
Currency Hedged (Buy/Sell), Fair Value, Asset/(Liability), Net	(636)	(1,180)
U.S. Dollar/Euro [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	4,241	4,217
Currency Hedged (Buy/Sell), Fair Value, Asset/(Liability), Net	(76)	(57)
U.S. Dollar/U.K. Pound Sterling [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	2,444	3,865
Currency Hedged (Buy/Sell), Fair Value, Asset/(Liability), Net	$ (37)	$ (73)

Derivatives - Summary of Fair Value Amounts of Company's Derivative Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Forward exchange contracts, Assets	$ 746	$ 961
Forward exchange contracts, Liabilities	(749)	(1,310)
Total net derivative (liability) designated as hedging instruments	(3)	(349)
Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Forward exchange contracts, Assets	746	961
Forward exchange contracts, Liabilities	(749)	(1,310)
Total net derivative (liability) designated as hedging instruments	$ (3)	$ (349)

Derivatives - Summary of Fair Value Amounts of Company's Derivative Instruments (Parenthetical) (Detail) - USD ($) $ in Thousands	Sep. 30, 2013	Dec. 31, 2012
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative assets classified in other current assets	$ 746	$ 961
Derivative liabilities classified in other current liabilities	$ 749	$ 1,310

Derivatives - Summary of Gains (Losses) on Derivatives Designated as Hedging Instruments (Detail) - Forward Exchange Contracts [Member] - Cash Flow Hedging [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Net (loss) recognized in OCI	$ (1,837)	$ (581)	$ (315)	$ (312)
Net gain (loss) reclassified from OCI into income	297	(739)	1,102	(1,178)
Net (loss) recognized in expense		$ (66)		$ (66)

Derivatives - Summary of Gains on Derivatives Not Designated as Hedging Instruments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Derivative not Designated as Hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net (loss) gain recognized in income	$ (514)	$ (552)	$ 141	$ (552)

Inventories - Summary of Inventories (Detail) - USD ($) $ in Thousands	Sep. 30, 2013	Dec. 31, 2012
Inventory Disclosure [Abstract]
Raw materials	$ 72,240	$ 76,610
Work-in-process	22,145	19,708
Finished goods	41,675	38,321
Inventories	$ 136,060	$ 134,639

Acquisition - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended			9 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Mar. 12, 2013	Sep. 30, 2013	Sep. 30, 2012
Business Acquisition [Line Items]
Total cash paid, net of cash acquired				$ 2,326	$ 24,385
Alter Power Systems [Member]
Business Acquisition [Line Items]
Acquisition purchase price, net of cash acquired			$ 2,426
Acquisition date				Mar. 12, 2013
Total cash paid, net of cash acquired	$ 2,058	$ 2,426	$ 2,426
Cash acquired from acquisition				$ 21
Remaining cash to be paid				368
Holdback provisions paid				$ 123

Acquisition - Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	1 Months Ended			9 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Mar. 12, 2013	Sep. 30, 2013	Sep. 30, 2012
Business Acquisition [Line Items]
Total purchase price, net of cash acquired				$ 2,326	$ 24,385
Alter Power Systems [Member]
Business Acquisition [Line Items]
Current assets			$ 1,053
Property and equipment			211
Intangible assets			2,806
Other assets			67
Total assets acquired			4,137
Debt (Note 11)			770
Deferred taxes and other liabilities			920
Total liabilities assumed			1,690
Total purchase price			2,447
Cash acquired			(21)
Total purchase price, net of cash acquired	$ 2,058	$ 2,426	$ 2,426

Acquisition - Allocation of Acquired Intangible Assets and Related Estimates of Useful Lives (Detail) - USD ($) $ in Thousands	1 Months Ended
	Aug. 31, 2013	Mar. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	$ 268	$ 2,806
Current Developed Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets		$ 2,208
Estimated useful life of finite lived intangible assets		9 years
Trademarks and Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets		$ 598
Estimated useful life of finite lived intangible assets		3 years

Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Goodwill And Intangible Assets Disclosure [Abstract]
Impairment of goodwill	$ 0
Aggregate amortization expense related to acquired intangibles		$ 361	$ 215	$ 1,537	$ 453

Goodwill and Intangible Assets - Goodwill (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill gross carrying amount, Beginning balance	$ 290,147	$ 279,498
Acquired goodwill, gross		9,989
Foreign currency translation	(33)	660
Goodwill gross carrying amount, Ending balance	290,114	290,147
Accumulated Impairment Loss, Beginning balance	(139,414)	(139,414)
Acquired goodwill, impairment loss
Foreign currency translation, impairment loss
Accumulated Impairment Loss, Ending balance	(139,414)	(139,414)
Goodwill, net, Beginning balance	150,733	140,084
Acquired goodwill, net		9,989
Foreign currency translation, net	(33)	660
Goodwill, net, Ending balance	$ 150,700	$ 150,733

Goodwill and Intangible Assets - Goodwill (Parenthetical) (Detail) - USD ($) $ in Thousands	1 Months Ended	9 Months Ended
	Aug. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011
Goodwill [Line Items]
Acquisition purchase price, net of cash acquired		$ 2,326	$ 24,385
Goodwill in connection with acquisition		$ 150,700		$ 150,733	$ 140,084
Plasmart, Inc. [Member]
Goodwill [Line Items]
Acquisition purchase price, net of cash acquired	$ 22,607
Goodwill in connection with acquisition	$ 9,989

Goodwill and Intangible Assets - Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	$ 124,887	$ 121,693
Accumulated Amortization	(112,253)	(110,716)
Foreign Currency Translation	682	584
Intangible assets, net	13,316	11,561
Completed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	84,680	82,084
Accumulated Amortization	(77,823)	(77,243)
Foreign Currency Translation	369	254
Intangible assets, net	7,226	5,095
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	14,571	14,571
Accumulated Amortization	(9,590)	(8,886)
Foreign Currency Translation	281	312
Intangible assets, net	5,262	5,997
Patents, Trademarks, Trade Names and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	25,636	25,038
Accumulated Amortization	(24,840)	(24,587)
Foreign Currency Translation	32	18
Intangible assets, net	$ 828	$ 469

Goodwill and Intangible Assets - Intangible Assets (Parenthetical) (Detail) - USD ($) $ in Thousands	1 Months Ended				9 Months Ended
	Aug. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Mar. 12, 2013	Sep. 30, 2013	Sep. 30, 2012
Finite-Lived Intangible Assets [Line Items]
Acquisition purchase price					$ 2,326	$ 24,385
Completed technology of net assets	$ 268		$ 2,806
Completed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Completed technology of net assets	$ 388
Alter Power Systems [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition purchase price		$ 2,058	2,426	$ 2,426
Intangible asset in connection with acquisition			2,806
Alter Power Systems [Member] \| Completed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset in connection with acquisition			2,208
Alter Power Systems [Member] \| Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset in connection with acquisition			$ 598

Goodwill and Intangible Assets - Estimated Amortization Expense (Detail) $ in Thousands	Sep. 30, 2013 USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
2013 (remaining)	$ 466
2014	1,768
2015	1,752
2016	1,570
2017	1,541
2018	1,532
Thereafter	$ 4,687

Other Assets - Schedule of Other Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Current Assets:
Income tax receivable	$ 10,684	$ 12,768
Other	17,967	15,280
Total other current assets	28,651	28,048
Other Assets:
Deferred tax assets, net	9,828	9,497	$ 10,274
Long-term income tax receivable	19,411	17,720	15,281
Other	1,959	2,195	1,992
Total other assets	$ 31,198	$ 29,412	$ 27,547

Other Liabilities - Schedule of Other Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Current Liabilities:
Product warranties	$ 6,732	$ 8,266
Deferred revenue	4,599	9,280
Other	24,568	19,859
Total other current liabilities	35,899	37,405
Other Liabilities:
Long-term income tax payable	44,309	38,600	$ 31,365
Accrued compensation	21,078	18,750	15,174
Other	5,004	3,745	953
Total other liabilities	$ 70,391	$ 61,095	$ 47,492

Debt - Additional Information (Detail) $ in Thousands	9 Months Ended
Debt - Additional Information (Detail) $ in Thousands	Sep. 30, 2013 USD ($) Institution	Dec. 31, 2012 USD ($)
Japan Line of Credit [Member]
Debt Instrument [Line Items]
Number of financial institutions for available lines of credit and borrowing arrangements \| Institution	2
Aggregate borrowings expire and renewed	3 month intervals
Total available line of credit	$ 23,284
Total borrowings outstanding	0	$ 0
Plasmart Line of Credit [Member]
Debt Instrument [Line Items]
Total borrowings outstanding	0	0
Alter Line of Credit [Member]
Debt Instrument [Line Items]
Total borrowings outstanding	$ 0	$ 0

Product Warranties - Product Warranty Activities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Guarantees [Abstract]
Beginning balance	$ 8,266	$ 8,315
Provision for product warranties	1,705	3,750
Direct charges to warranty liability	(3,142)	(3,733)
Foreign currency translation	(97)	505
Ending balance	$ 6,732	$ 8,837

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Effective tax rate	80.40%	61.30%	44.80%	35.70%
Tax holiday expired			Dec. 31, 2011
Gross unrecognized tax benefits excluding interest and penalties	$ 45,402		$ 45,402		$ 40,674
Net unrecognized tax benefit excluding interest and penalties that would impact effective tax rate	23,570		23,570
Accrued interest on unrecognized tax benefits	$ 2,147		$ 2,147		$ 1,571

Net Income Per Share - Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Numerator:
Net income	$ 2,458	$ 2,580	$ 15,539	$ 43,920
Denominator:
Shares used in net income per common share - basic	53,165,000	52,854,000	52,998,000	52,679,000
Effect of dilutive securities:
Stock options, restricted stock and employee stock purchase plan	348,000	436,000	412,000	561,000
Shares used in net income per common share - diluted	53,513,000	53,290,000	53,410,000	53,240,000
Net income per common share:
Basic	$ 0.05	$ 0.05	$ 0.29	$ 0.83
Diluted	$ 0.05	$ 0.05	$ 0.29	$ 0.82

Net Income Per Share - Additional Information (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]
Stock options and restricted stock units outstanding	1,059,000	1,250,000	1,059,000	1,250,000
Number of shares excluded from computation of diluted earnings per share	104,000	105,000	101,000	227,000

Stockholder's Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended						9 Months Ended
	Jul. 25, 2011	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2013	Sep. 30, 2012
Equity [Abstract]
Common stock, value of shares authorized to repurchase	$ 200,000
Stock repurchase, shares								107,000
Value of shares repurchased								$ 2,875
Average price of repurchased shares								$ 26.87
Cash dividend paid		$ 0.16	$ 0.16	$ 0.16	$ 0.16	$ 0.15	$ 0.15	$ 0.48	$ 0.46
Dividend payment to common shareholders								$ 25,458	$ 24,261
Dividend declared date								Oct. 28, 2013
Cash dividend to be paid		$ 0.16
Dividend to be paid date								Dec. 13, 2013
Dividend declared, shareholders of record date								Dec. 02, 2013

Business Segment, Geographic Area, Product and Significant Customer Information - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013 Segment Customer Product
Segment Reporting [Abstract]
Number of reportable segments	4
Number of operating segments	8
Number of product groups \| Product	4
Number of major customers \| Customer	2
Entity wide net revenue major customer percentage minimum	10.00%

Business Segment, Geographic Area, Product and Significant Customer Information - Net Revenues by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Total net revenues	$ 166,453	$ 141,447	$ 465,026	$ 509,712
Advanced Manufacturing Capital Equipment [Member]
Segment Reporting Information [Line Items]
Total net revenues	133,307	104,191	363,512	382,016
Analytical Solutions Group [Member]
Segment Reporting Information [Line Items]
Total net revenues	13,313	15,160	41,217	47,680
Europe Region Sales & Service Operations [Member]
Segment Reporting Information [Line Items]
Total net revenues	12,436	13,485	35,287	38,141
Asia Region Sales & Service Operations [Member]
Segment Reporting Information [Line Items]
Total net revenues	52,558	46,782	149,267	182,663
Corporate, Eliminations and Other [Member]
Segment Reporting Information [Line Items]
Total net revenues	$ (45,161)	$ (38,171)	$ (124,257)	$ (140,788)

Business Segment, Geographic Area, Product and Significant Customer Information - Schedule of Gross Profit (Loss) by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Gross profit	$ 62,234	$ 56,571	$ 178,894	$ 216,878
Advanced Manufacturing Capital Equipment [Member]
Segment Reporting Information [Line Items]
Gross profit	43,151	34,829	121,647	141,521
Analytical Solutions Group [Member]
Segment Reporting Information [Line Items]
Gross profit	6,758	8,100	21,239	24,485
Europe Region Sales & Service Operations [Member]
Segment Reporting Information [Line Items]
Gross profit	3,427	3,547	10,005	11,292
Asia Region Sales & Service Operations [Member]
Segment Reporting Information [Line Items]
Gross profit	11,580	9,030	31,366	28,143
Corporate, Eliminations and Other [Member]
Segment Reporting Information [Line Items]
Gross profit	$ (2,682)	$ 1,065	$ (5,363)	$ 11,437

Business Segment, Geographic Area, Product and Significant Customer Information - Schedule of Capital Expenditures, Depreciation and Amortization Expense and Segment Assets by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Capital expenditures	$ 2,794	$ 3,028	$ 9,154	$ 11,040
Depreciation and amortization	4,245	3,640	12,715	10,197
Accounts receivable	98,133		98,133		$ 82,060
Inventory	136,060		136,060		134,639
Total segment assets	234,193		234,193		216,699	$ 274,526
Advanced Manufacturing Capital Equipment [Member]
Segment Reporting Information [Line Items]
Capital expenditures	1,893	2,102	6,599	6,741
Depreciation and amortization	2,861	2,409	8,819	6,797
Accounts receivable	14,645		14,645		9,644
Inventory	107,935		107,935		108,397
Total segment assets	122,580		122,580		118,041
Analytical Solutions Group [Member]
Segment Reporting Information [Line Items]
Capital expenditures	125	283	265	698
Depreciation and amortization	319	248	923	715
Accounts receivable	4,263		4,263		5,889
Inventory	4,354		4,354		3,841
Total segment assets	8,617		8,617		9,730
Europe Region Sales & Service Operations [Member]
Segment Reporting Information [Line Items]
Capital expenditures	24	35	137	109
Depreciation and amortization	86	102	260	305
Accounts receivable	6,611		6,611		5,813
Inventory	3,950		3,950		3,691
Total segment assets	10,561		10,561		9,504
Asia Region Sales & Service Operations [Member]
Segment Reporting Information [Line Items]
Capital expenditures	239	237	435	654
Depreciation and amortization	294	537	876	1,330
Accounts receivable	36,380		36,380		32,088
Inventory	28,532		28,532		29,534
Total segment assets	64,912		64,912		61,622
Corporate, Eliminations and Other [Member]
Segment Reporting Information [Line Items]
Capital expenditures	513	371	1,718	2,838
Depreciation and amortization	685	$ 344	1,837	$ 1,050
Accounts receivable	36,234		36,234		28,626
Inventory	(8,711)		(8,711)		(10,824)
Total segment assets	$ 27,523		$ 27,523		$ 17,802

Business Segment, Geographic Area, Product and Significant Customer Information - Reconciliation of Segment Assets to Consolidated Total Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement Of Financial Position [Abstract]
Total segment assets	$ 234,193	$ 216,699	$ 274,526
Cash and cash equivalents and investments	625,837	627,399	573,392
Other current assets	38,710	36,242	44,856
Property, plant and equipment, net	78,020	80,516	72,487
Goodwill and intangible assets, net	164,016	162,294	141,127
Other assets	31,198	29,412	27,547
Total assets	$ 1,171,974	$ 1,152,562	$ 1,133,935

Business Segment, Geographic Area, Product and Significant Customer Information - Worldwide Net Revenue for Each Group of Products (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenue from External Customer [Line Items]
Net sales from product groups	$ 166,453	$ 141,447	$ 465,026	$ 509,712
Instruments and Control Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	60,615	57,761	184,729	205,654
Power and Reactive Gas Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	72,471	52,031	182,294	199,864
Vacuum Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	18,098	15,435	53,588	53,158
Analytical Solutions Group Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	$ 15,269	$ 16,220	$ 44,415	$ 51,036

Business Segment, Geographic Area, Product and Significant Customer Information - Company Long-Lived Assets in Different Geographic Regions (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 166,453	$ 141,447	$ 465,026	$ 509,712
Long-lived assets	79,977		79,977		$ 82,711
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	91,286	73,775	252,704	259,954
Long-lived assets	61,404		61,404		62,203
Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	16,491	12,574	46,597	54,472
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	13,825	14,270	40,243	67,122
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	20,433	21,341	57,958	65,800
Long-lived assets	5,175		5,175		5,844
Asia (excluding Korea and Japan) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	24,418	$ 19,487	67,524	$ 62,364
Long-lived assets	$ 13,398		$ 13,398		$ 14,664

Business Segment, Geographic Area, Product and Significant Customer Information - Customers With Net Revenues Greater Than 10% of Total Net Revenues (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Customer A [Member]
Revenue, Major Customer [Line Items]
Percentage of total net revenues	16.40%	13.90%	16.70%	14.80%
Customer B [Member]
Revenue, Major Customer [Line Items]
Percentage of total net revenues	13.50%	8.50%	11.80%	10.30%

Restructuring - Additional Information (Detail) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2013 USD ($)	Sep. 30, 2013 USD ($) People
Restructuring And Related Activities [Abstract]
Number of Reduction in the Company's headcount \| People		27
Restructuring Charges \| $	$ 1,126	$ 1,364

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Commitments And Contingencies Disclosure [Abstract]
Litigation settlement with shareholders of former subsidiary			$ 5,316		$ 5,316
Insurance reimbursement for litigation settlement		$ 1,071