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

3 Months Ended

Mar. 31, 2013

The following is net revenues by reportable segment:


	Three Months Ended March 31,
	2013			2012
Advanced Manufacturing Capital Equipment	$	105,327		$	143,223
Analytical Solutions Group		14,396			15,793
Europe Region Sales & Service Operations⁽¹⁾		11,646			12,206
Asia Region Sales & Service Operations⁽¹⁾		47,353			72,097
Corporate, Eliminations and Other		(37,077	)		(52,451	)

	$	141,645		$	190,868

(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.

Schedule of Gross Profit (Loss) by Reportable Segment

The following is gross profit by reportable segment:


	Three Months Ended March 31,
	2013		2012
Advanced Manufacturing Capital Equipment	$	34,836	$	57,838
Analytical Solutions Group		7,448		8,100
Europe Region Sales & Service Operations⁽¹⁾		3,191		4,151
Asia Region Sales & Service Operations⁽¹⁾		8,831		11,861
Corporate, Eliminations and Other		396		1,841

	$	54,702	$	83,791

(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 months ended March 31, 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 March 31, 2013:
Capital expenditures	$	2,612	$	111	$	15	$	63	$	555	$	3,356


	Product Groups				Foreign Sales & Service Operations
	Advanced Manufacturing Capital Equipment		Analytical Solutions Group		Europe		Asia		Corporate, Eliminations and Other		Total
Three Months Ended March 31, 2012:
Capital expenditures	$	3,176	$	115	$	45	$	292	$	939	$	4,567

The following is depreciation and amortization by reportable segment for the three months ended March 31, 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 March 31, 2013:
Depreciation and amortization	$	2,941	$	243	$	74	$	294	$	540	$	4,092


	Product Groups				Foreign Sales & Service Operations
	Advanced Manufacturing Capital Equipment		Analytical Solutions Group		Europe		Asia		Corporate, Eliminations and Other		Total
Three Months Ended March 31, 2012:
Depreciation and amortization	$	2,138	$	199	$	81	$	369	$	356	$	3,143

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
March 31, 2013:
Segment assets:
Accounts receivable	$	13,696	$	5,497	$	5,865	$	33,413	$	31,986		$	90,457
Inventory		106,872		3,975		3,770		24,367		(7,731	)		131,253

Total segment assets	$	120,568	$	9,472	$	9,635	$	57,780	$	24,255		$	221,710


	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	$	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

Reconciliation of Segment Assets to Consolidated Total Assets

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


	March 31, 2013		December 31, 2012
Total segment assets	$	221,710	$	216,699
Cash and cash equivalents and investments		608,499		627,399
Other current assets		38,593		36,242
Property, plant and equipment, net		79,709		80,516
Goodwill and intangible assets, net		164,090		162,294
Other assets		12,807		11,692

Consolidated total assets	$	1,125,408	$	1,134,842

Worldwide Net Revenue for Each Group of Products

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


	Three Months Ended March 31,
	2013		2012
Instruments and Control Products	$	60,028	$	77,481
Power and Reactive Gas Products		52,063		77,566
Vacuum Products		15,158		20,028
Analytical Solutions Group Products		14,396		15,793

	$	141,645	$	190,868

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 March 31,
	2013		2012
Net revenues
United States	$	74,567	$	95,104
Japan		13,829		33,433
Europe		18,803		21,985
Asia (excluding Japan)		34,446		40,346

	$	141,645	$	190,868


	March 31, 2013		December 31, 2012
Long-lived assets⁽¹⁾
United States	$	62,536	$	62,203
Japan		2,237		2,562
Europe		5,215		5,844
Asia (excluding Japan)		11,621		12,102

	$	81,609	$	82,711

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

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 March 31,
	2013			2012
Customer A		14.7	%		14.9	%
Customer B		9.6	%		10.8	%

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References + Details

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 266,708	$ 287,588
Short-term investments	331,634	327,653
Trade accounts receivable, net	90,457	82,060
Inventories	131,253	134,639
Deferred income taxes	8,585	8,194
Other current assets	30,008	28,048
Total current assets	858,645	868,182
Property, plant and equipment, net	79,709	80,516
Long-term investments	10,157	12,158
Goodwill	150,340	150,733
Intangible assets, net	13,750	11,561
Other assets	12,807	11,692
Total assets	1,125,408	1,134,842
Current liabilities:
Short-term borrowings	759
Accounts payable	21,159	16,803
Accrued compensation	17,621	20,955
Income taxes payable	3,151	4,148
Other current liabilities	34,042	37,405
Total current liabilities	76,732	79,311
Other liabilities	45,613	43,375
Commitments and contingencies (Note 17)
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; 52,794,736 and 52,748,849 shares issued and outstanding at March 31, 2013 and December 31, 2012, respectively	113	113
Additional paid-in capital	719,782	718,005
Retained earnings	275,058	278,583
Accumulated other comprehensive income	8,110	15,455
Total stockholders' equity	1,003,063	1,012,156
Total liabilities and stockholders' equity	$ 1,125,408	$ 1,134,842

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income Statement [Abstract]
Tax expense on changes in value of financial instruments designated as cash flow hedges	$ 605	$ 413
Tax on foreign currency translation adjustments	0	0
Tax benefit on unrealized gain on investments	$ (10)	$ (27)

Goodwill and Intangible Assets - Goodwill (Parenthetical) (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Aug. 31, 2012	Mar. 31, 2013
Goodwill [Line Items]
Acquisition purchase price, net of cash acquired		$ 1,963
Plasmart, Inc. [Member]
Goodwill [Line Items]
Acquisition purchase price, net of cash acquired	$ 22,607
Goodwill in connection with acquisition	$ 9,989

Recently Issued Accounting Pronouncements

3 Months Ended

Mar. 31, 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 2011-11. The provisions of this ASU are effective for interim and annual periods beginning on or after January 1, 2013. This new ASU does 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. This new ASU does not 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
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Direct Effects of a Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6510796

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6507316

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22583-107794

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Indirect Effects of a Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6515603

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.10-01.(b)(6))
-URI http://asc.fasb.org/extlink&oid=6958853&loc=d3e46468-122699

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22580-107794

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Accounting Change
-URI http://asc.fasb.org/extlink&oid=6503790

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22499-107794

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Retrospective Application
-URI http://asc.fasb.org/extlink&oid=6523989

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e725-108305

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section 45
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e765-108305

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 01
-Paragraph b
-Subparagraph 6
-Article 10

+ Details

Business Segment, Geographic Area, Product and Significant Customer Information - Schedule of Gross Profit (Loss) by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Statistics [Line Items]
Gross profit	$ 54,702	$ 83,791
Advanced Manufacturing Capital Equipment [Member]
Operating Statistics [Line Items]
Gross profit	34,836	57,838
Analytical Solutions Group [Member]
Operating Statistics [Line Items]
Gross profit	7,448	8,100
Europe Region Sales & Service Operations [Member]
Operating Statistics [Line Items]
Gross profit	3,191	4,151
Asia Region Sales & Service Operations [Member]
Operating Statistics [Line Items]
Gross profit	8,831	11,861
Corporate, Eliminations and Other [Member]
Operating Statistics [Line Items]
Gross profit	$ 396	$ 1,841

Acquisition - Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed (Detail) $ in Thousands	Mar. 31, 2013 USD ($)
Business Combinations [Abstract]
Current assets	$ 1,608
Property and equipment	211
Intangible assets	3,093
Total assets acquired	4,912
Debt (Note 11)	791
Deferred taxes and other liabilities	1,667
Total liabilities assumed	2,458
Total purchase price	$ 2,454

Other Assets

3 Months Ended

Mar. 31, 2013

Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]

Other Assets

9)	Other Assets


	March 31, 2013		December 31, 2012
Other Current Assets:
Income tax receivable	$	12,513	$	12,768
Other		17,495		15,280

Total other current assets	$	30,008	$	28,048

Other Assets:
Deferred tax assets, net	$	10,907	$	9,497
Other		1,900		2,195

Total other assets	$	12,807	$	11,692

Business Segment, Geographic Area, Product and Significant Customer Information - Additional Information (Detail)	3 Months Ended
	Mar. 31, 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%

Goodwill and Intangible Assets - Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	$ 124,786	$ 121,693
Accumulated Amortization	(111,150)	(110,716)
Foreign Currency Translation	114	584
Intangible assets, net	13,750	11,561
Completed technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	84,579	82,084
Accumulated Amortization	(77,391)	(77,243)
Foreign Currency Translation	(8)	254
Intangible assets, net	7,180	5,095
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	14,571	14,571
Accumulated Amortization	(9,125)	(8,886)
Foreign Currency Translation	109	312
Intangible assets, net	5,555	5,997
Patents, trademarks, trade names and other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	25,636	25,038
Accumulated Amortization	(24,634)	(24,587)
Foreign Currency Translation	13	18
Intangible assets, net	$ 1,015	$ 469

Business Segment, Geographic Area, Product and Significant Customer Information - Reconciliation of Segment Assets to Consolidated Total Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Total segment assets	$ 221,710	$ 216,699
Cash and cash equivalents and investments	608,499	627,399
Other current assets	38,593	36,242
Property, plant and equipment, net	79,709	80,516
Goodwill and intangible assets, net	164,090	162,294
Other assets	12,807	11,692
Total assets	$ 1,125,408	$ 1,134,842

Recently Issued Accounting Pronouncements (Policies)	3 Months Ended
Recently Issued Accounting Pronouncements (Policies)	Mar. 31, 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 2011-11. The provisions of this ASU are effective for interim and annual periods beginning on or after January 1, 2013. This new ASU does 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. This new ASU does not have a material effect on the Company’s consolidated financial statements.

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
	Mar. 31, 2013	Mar. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Net gain recognized in OCI	$ 1,779	$ 1,334
Net gain (loss) reclassified from OCI into income	$ 203	$ (513)

Business Segment, Geographic Area, Product and Significant Customer Information - Net Revenues by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Statistics [Line Items]
Total net revenues	$ 141,645	$ 190,868
Advanced Manufacturing Capital Equipment [Member]
Operating Statistics [Line Items]
Total net revenues	105,327	143,223
Analytical Solutions Group [Member]
Operating Statistics [Line Items]
Total net revenues	14,396	15,793
Europe Region Sales & Service Operations [Member]
Operating Statistics [Line Items]
Total net revenues	11,646	12,206
Asia Region Sales & Service Operations [Member]
Operating Statistics [Line Items]
Total net revenues	47,353	72,097
Corporate, Eliminations and Other [Member]
Operating Statistics [Line Items]
Total net revenues	$ (37,077)	$ (52,451)

Commitments and Contingencies

3 Months Ended

Mar. 31, 2013

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

17)	Commitments and Contingencies

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.

- Definition

The entire disclosure for commitments and contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6449706&loc=d3e16207-108621

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14435-108349

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.25)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25287-109308

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 14
-Paragraph 3
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Acquisition - Allocation of Acquired Intangible Assets and Related Estimates of Useful Lives (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2013 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	$ 3,093
Current developed technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	$ 2,495
Estimated useful life of finite lived intangible assets	9 years
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	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Goodwill And Intangible Assets Disclosure [Abstract]
Aggregate amortization expense related to acquired intangibles	$ 434	$ 119

Goodwill and Intangible Assets - Estimated Amortization Expense (Detail) $ in Thousands	Mar. 31, 2013 USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
2013 (remaining)	$ 1,536
2014	1,685
2015	1,668
2016	1,511
2017	1,469
2018	1,460
Thereafter	$ 4,421

Inventories - Summary of Inventories (Detail) - USD ($) $ in Thousands	Mar. 31, 2013	Dec. 31, 2012
Inventory Disclosure [Abstract]
Raw materials	$ 75,752	$ 76,610
Work-in-process	19,708	19,708
Finished goods	35,793	38,321
Inventories	$ 131,253	$ 134,639

Net Income Per Share - Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Numerator:
Net income	$ 5,761	$ 22,768
Denominator:
Shares used in net income per common share - basic	52,773,000	52,504,000
Effect of dilutive securities:
Stock options, restricted stock and employee stock purchase plan	586,000	718,000
Shares used in net income per common share - diluted	53,359,000	53,222,000
Net income per common share:
Basic	$ 0.11	$ 0.43
Diluted	$ 0.11	$ 0.43

Business Segment, Geographic Area, Product and Significant Customer Information - Customers With Net Revenues Greater Than 10% of Total Net Revenues (Detail)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Customer A [Member]
Revenue, Major Customer [Line Items]
Percentage of total net revenues	14.70%	14.90%
Customer B [Member]
Revenue, Major Customer [Line Items]
Percentage of total net revenues	9.60%	10.80%

Product Warranties

3 Months Ended

Mar. 31, 2013

Product Warranties Disclosures [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:


	Three Months Ended March 31,
	2013			2012
Balance at January 1	$	8,266		$	8,315
Provision for product warranties		630			692
Direct charges to warranty liability		(1,250	)		(1,462	)
Foreign currency translation		(113	)		—

Balance at March 31	$	7,533		$	7,545

Acquisition - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2013	Mar. 12, 2013
Business Acquisition [Line Items]
Acquisition purchase price	$ 2,454
Alter Power Systems [Member]
Business Acquisition [Line Items]
Acquisition purchase price	$ 2,454	$ 2,454
Acquisition date	Mar. 12, 2013
Total cash paid	$ 1,963
Remaining cash to be paid	$ 491

Acquisition

3 Months Ended

Mar. 31, 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 for a purchase price of approximately $2,454. Total cash paid was $1,963 in March 2013. The remaining $491 will be paid once holdback provisions are 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	$	1,608
Property and equipment		211
Intangible assets		3,093


Total assets acquired		4,912
Debt (Note 11)		791
Deferred taxes and other liabilities		1,667

Total liabilities assumed		2,458

Total purchase price	$	2,454

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.


Current developed technology	$	2,495	9 year useful life
Trade names		598	3 year useful life

	$	3,093

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 they 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 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 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 88-16
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 17: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph F4
-Subparagraph e
-Appendix F

Reference 18: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51, 52
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 19: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 67-73
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Stockholder's Equity

3 Months Ended

Mar. 31, 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 will depend upon a variety of factors, including business conditions, stock market conditions and business development activities, including, but not limited to, merger and acquisition opportunities. These repurchases may be commenced, suspended or discontinued at any time without prior notice.

During the three months ended March 31, 2013, the Company repurchased 61,000 shares of its common stock for $1,668 for an average price of $27.35 per share.

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 three months ended March 31, 2013, the Board of Directors authorized a cash dividend of $0.16 per share, which totaled $8,448. During the three months ended March 31, 2012, the Board of Directors authorized a cash dividend of $0.15 per share, which totaled $7,877.

On May 6, 2013, our Board of Directors declared a quarterly cash dividend of $0.16 per share to be paid on June 14, 2013 to shareholders of record as of June 3, 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, if any, including other comprehensive income (as applicable). Including, but not limited to: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms, and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables, effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Section B
-Paragraph 7, 11A
-Chapter 1
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

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

Reference 17: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph d
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Reference 18: http://www.xbrl.org/2003/role/presentationRef
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-Name Regulation S-X (SX)
-Number 210
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-Paragraph 29, 30, 31
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Reference 19: http://www.xbrl.org/2003/role/presentationRef
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-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
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Reference 20: http://www.xbrl.org/2003/role/presentationRef
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-Name Regulation S-X (SX)
-Number 210
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Reference 21: http://www.xbrl.org/2003/role/presentationRef
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Reference 23: http://www.xbrl.org/2003/role/presentationRef
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-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

+ Details

Goodwill and Intangible Assets

3 Months Ended

Mar. 31, 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 losses during the three months ended March 31, 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		(393	)		—			(393	)		660		—			660

Ending balance at March 31, 2013 and December 31, 2012	$	289,754		$	(139,414	)	$	150,340		$	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 March 31, 2013:
Completed technology⁽¹⁾	$	84,579	$	(77,391	)	$	(8	)	$	7,180
Customer relationships		14,571		(9,125	)		109			5,555
Patents, trademarks, trade names and other⁽¹⁾		25,636		(24,634	)		13			1,015

	$	124,786	$	(111,150	)	$	114		$	13,750

(1)	In March 2013, the Company purchased Alter for $2,454. The Company recorded $3,093 of separately identified intangible assets, of which $2,495 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 months ended March 31, 2013 and 2012 were $434 and $119, respectively. Estimated amortization expense for each of the remaining fiscal years is as follows:


Year	Amount
2013 (remaining)	$	1,536
2014		1,685
2015		1,668
2016		1,511
2017		1,469
2018		1,460
Thereafter		4,421

- 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

Goodwill and Intangible Assets - Intangible Assets (Parenthetical) (Detail) - USD ($) $ in Thousands	Mar. 31, 2013	Mar. 12, 2013
Finite-Lived Intangible Assets [Line Items]
Acquisition purchase price	$ 2,454
Alter Power Systems [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition purchase price	2,454	$ 2,454
Intangible asset in connection with acquisition	3,093
Completed technology [Member] \| Alter Power Systems [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset in connection with acquisition	2,495
Trade names [Member] \| Alter Power Systems [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset in connection with acquisition	$ 598

Fair Value Measurements - Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis (Parenthetical) (Detail) - USD ($) $ in Thousands	Mar. 31, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Non-negotiable time deposits	$ 10,780	$ 51,138
Cash included in cash and cash equivalent amount	169,929	185,143
Short-term investments	330,821	326,862
Time deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term investments	$ 53
Short-term investments		$ 52

- Definition

Amount of investment in debt and equity securities categorized neither as trading securities nor held-to-maturity securities and intended be sold or mature one year or operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Number 133
-Paragraph 22
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 15C
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Section A
-Paragraph 4, 5
-Chapter 3
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 16
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

+ Details

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Available-for-Sale Securities
-URI http://asc.fasb.org/extlink&oid=6505594

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

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 12
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 17
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 15C
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 15E
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 15D
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Net Income Per Share (Tables)

3 Months Ended

Mar. 31, 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 March 31,
	2013		2012
Numerator:
Net income	$	5,761	$	22,768

Denominator:
Shares used in net income per common share – basic		52,773,000		52,504,000
Effect of dilutive securities:
Stock options, restricted stock and employee stock purchase plan		586,000		718,000

Shares used in net income per common share – diluted		53,359,000		53,222,000

Net income per common share:
Basic	$	0.11	$	0.43
Diluted	$	0.11	$	0.43

Derivatives - Summary of Primary Net Hedging Positions and Corresponding Fair Values (Detail) - USD ($) $ in Thousands	Mar. 31, 2013	Dec. 31, 2012
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	$ 26,596	$ 41,448
Currency Hedged (Buy/Sell), Fair Value, Asset/(Liability), Net	1,266	(349)
U.S. Dollar/Japanese Yen [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	8,962	13,992
Currency Hedged (Buy/Sell), Fair Value, Asset/(Liability), Net	1,291	961
U.S. Dollar/South Korean Won [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	12,684	19,374
Currency Hedged (Buy/Sell), Fair Value, Asset/(Liability), Net	(183)	(1,180)
U.S. Dollar/Euro [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	2,669	4,217
Currency Hedged (Buy/Sell), Fair Value, Asset/(Liability), Net	38	(57)
U.S. Dollar/U.K. Pound Sterling [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	2,281	3,865
Currency Hedged (Buy/Sell), Fair Value, Asset/(Liability), Net	$ 120	$ (73)

Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2013	May 01, 2013
Document Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Trading Symbol	MKSI
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		53,006,559

Other Assets (Tables)

3 Months Ended

Mar. 31, 2013

Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]

Schedule of Other Assets


	March 31, 2013		December 31, 2012
Other Current Assets:
Income tax receivable	$	12,513	$	12,768
Other		17,495		15,280

Total other current assets	$	30,008	$	28,048

Other Assets:
Deferred tax assets, net	$	10,907	$	9,497
Other		1,900		2,195

Total other assets	$	12,807	$	11,692

Net Income Per Share

3 Months Ended

Mar. 31, 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 March 31,
	2013		2012
Numerator:
Net income	$	5,761	$	22,768

Denominator:
Shares used in net income per common share – basic		52,773,000		52,504,000
Effect of dilutive securities:
Stock options, restricted stock and employee stock purchase plan		586,000		718,000

Shares used in net income per common share – diluted		53,359,000		53,222,000

Net income per common share:
Basic	$	0.11	$	0.43
Diluted	$	0.11	$	0.43

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 March 31, 2013, stock options and restricted stock units relating to an aggregate of approximately 1,261,000 shares were outstanding. For the three months ended March 31, 2013 and 2012, the potential dilutive effect of approximately 98,000 and 97,000 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.

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 31, 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	52,794,736	52,748,849
Common Stock, shares outstanding	52,794,736	52,748,849

Basis of Presentation

3 Months Ended

Mar. 31, 2013

Text Block [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 March 31, 2013 and for the three months ended March 31, 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.

Fair Value Measurements - Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Derivatives - currency forward contracts	$ 1,566	$ 961
Liabilities Derivatives - currency forward contracts	300	1,310
Long-term investments	10,157	12,158
Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	85,999	51,307
Assets Derivatives - currency forward contracts	1,566	961
Total assets	429,303	392,027
Liabilities Derivatives - currency forward contracts	300	1,310
Short-term investments	331,634	327,601
Total current assets	419,199	379,869
Long-term investments	10,104	12,158
Other current liabilities	300	1,310
Fair Value Measurements, Recurring [Member] \| Money market funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	85,863	51,291
Fair Value Measurements, Recurring [Member] \| Bankers' acceptance drafts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	136	16
Available-for-sale securities	93	242
Fair Value Measurements, Recurring [Member] \| Mutual funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual funds	813	791
Fair Value Measurements, Recurring [Member] \| U.S. treasury obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	13,042	13,054
Fair Value Measurements, Recurring [Member] \| U.S. agency obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	327,790	325,672
Fair Value Measurements, Recurring [Member] \| Other current assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Derivatives - currency forward contracts	1,566	961
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	85,863	51,291
Assets Derivatives - currency forward contracts
Total assets	389,360	347,747
Liabilities Derivatives - currency forward contracts
Short-term investments	293,393	284,298
Total current assets	379,256	335,589
Long-term investments	10,104	12,158
Other current liabilities
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value Measurements, Recurring [Member] \| Money market funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	85,863	51,291
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value Measurements, Recurring [Member] \| Bankers' acceptance drafts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents
Available-for-sale securities
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value Measurements, Recurring [Member] \| Mutual funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual funds	813	791
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value Measurements, Recurring [Member] \| U.S. treasury obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value Measurements, Recurring [Member] \| U.S. agency obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	302,684	295,665
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value Measurements, Recurring [Member] \| Other current assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Derivatives - currency forward contracts
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	136	16
Assets Derivatives - currency forward contracts	1,566	961
Total assets	39,943	44,280
Liabilities Derivatives - currency forward contracts	300	1,310
Short-term investments	38,241	43,303
Total current assets	39,943	44,280
Long-term investments
Other current liabilities	300	1,310
Significant Other Observable Inputs (Level 2) [Member] \| Fair Value Measurements, Recurring [Member] \| Money market funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents
Significant Other Observable Inputs (Level 2) [Member] \| Fair Value Measurements, Recurring [Member] \| Bankers' acceptance drafts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	136	16
Available-for-sale securities	93	242
Significant Other Observable Inputs (Level 2) [Member] \| Fair Value Measurements, Recurring [Member] \| Mutual funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual funds
Significant Other Observable Inputs (Level 2) [Member] \| Fair Value Measurements, Recurring [Member] \| U.S. treasury obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	13,042	13,054
Significant Other Observable Inputs (Level 2) [Member] \| Fair Value Measurements, Recurring [Member] \| U.S. agency obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	25,106	30,007
Significant Other Observable Inputs (Level 2) [Member] \| Fair Value Measurements, Recurring [Member] \| Other current assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Derivatives - currency forward contracts	1,566	961
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
Significant Unobservable Inputs (Level 3) [Member] \| Fair Value Measurements, Recurring [Member] \| Money market funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents
Significant Unobservable Inputs (Level 3) [Member] \| Fair Value Measurements, Recurring [Member] \| Bankers' acceptance drafts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents
Available-for-sale securities
Significant Unobservable Inputs (Level 3) [Member] \| Fair Value Measurements, Recurring [Member] \| Mutual funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual funds
Significant Unobservable Inputs (Level 3) [Member] \| Fair Value Measurements, Recurring [Member] \| U.S. treasury obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities
Significant Unobservable Inputs (Level 3) [Member] \| Fair Value Measurements, Recurring [Member] \| U.S. agency obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities
Significant Unobservable Inputs (Level 3) [Member] \| Fair Value Measurements, Recurring [Member] \| Other current assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Derivatives - currency forward contracts

Investments (Tables)

3 Months Ended

Mar. 31, 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:


	March 31, 2013		December 31, 2012
Available-for-sale investments:
Time deposits	$	—	$	52
Bankers’ acceptance drafts		93		242
U.S. treasury obligations		13,042		13,054
U.S. agency obligations		317,686		313,514

	$	330,821	$	326,862

Trading investments:
Mutual funds		813		791

	$	331,634	$	327,653

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

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


	March 31, 2013		December 31, 2012
Time deposits	$	53	$	—
U.S. agency obligations		10,104		12,158

	$	10,157	$	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:


	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
As of March 31, 2013:
Short-term investments:
Bankers’ acceptance drafts	$	93	$	—	$	—		$	93
U.S. treasury obligations		13,036		6		—			13,042
U.S. agency obligations		317,517		171		(2	)		317,686

	$	330,646	$	177	$	(2	)	$	330,821

Long-term investments:
Time deposits	$	53	$	—	$	—		$	53
U.S. agency obligations		10,099		5		—			10,104

	$	10,152	$	5	$	—		$	10,157


	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
As of December 31, 2012:
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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27337-111563

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

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 19, 20, 21
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 17
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 03-1
-Paragraph 21
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Product Warranties (Tables)

3 Months Ended

Mar. 31, 2013

Product Warranties Disclosures [Abstract]

Product Warranty Activities

Product warranty activities were as follows:


	Three Months Ended March 31,
	2013			2012
Balance at January 1	$	8,266		$	8,315
Provision for product warranties		630			692
Direct charges to warranty liability		(1,250	)		(1,462	)
Foreign currency translation		(113	)		—

Balance at March 31	$	7,533		$	7,545

Debt

3 Months Ended

Mar. 31, 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 March 31, 2013 of up to an equivalent of $24,424 U.S. dollars, with interest rates ranging from 0.63% to 1.475%. There were no borrowings outstanding under these arrangements at March 31, 2013 and December 31, 2012.

The Company’s Korean subsidiary has an available line of credit with a financial institution from the 2012 Plasmart acquisition. The available line of credit, which expires in 2014, provides for aggregate borrowings as of March 31, 2013 of up to an equivalent of $1,349 U.S. dollars at an average interest rate of 5.19%. There were no borrowings outstanding under this arrangement at March 31, 2013 and December 31, 2012.

The Company has lines of credit and short and long term borrowing arrangements with four financial institutions with various maturity dates from 2013 through 2015 as a result of the Alter acquisition. The lines of credit provide for aggregate borrowings as of March 31, 2013 of up to $872 U.S. dollars at interest rates ranging from 6.66% to 7.75%. The term loans provide for aggregate borrowings of up to an equivalent of $564 U.S. dollars at interest rates ranging from 1.34% to 4.23%. There was $791 outstanding under these arrangements at March 31, 2013.

- Definition

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

+ References + Details

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 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 March 31, 2013 and are summarized as follows:


			Fair Value Measurements at Reporting Date Using
Description	Total March 31, 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	$	85,863	$	85,863	$	—	$	—
Bankers’ acceptance drafts		136		—		136		—
Trading securities:
Mutual funds		813		813		—		—
Available-for-sale securities:
Bankers’ acceptance drafts		93		—		93		—
U.S. treasury obligations		13,042		—		13,042		—
U.S. agency obligations		327,790		302,684		25,106		—
Derivatives – currency forward contracts		1,566		—		1,566		—

Total assets	$	429,303	$	389,360	$	39,943	$	—

Liabilities:
Derivatives – currency forward contracts	$	300	$	—	$	300	$	—

Reported as follows:
Assets:
Cash and cash equivalents⁽¹⁾	$	85,999	$	85,863	$	136	$	—
Short-term investments		331,634		293,393		38,241		—
Other current assets		1,566		—		1,566		—

Total current assets	$	419,199	$	379,256	$	39,943	$	—

Long-term investments⁽²⁾	$	10,104	$	10,104	$	—	$	—

Liabilities:
Other current liabilities	$	300	$	—	$	300	$	—

(1)	The cash and cash equivalent amounts presented in the table above do not include cash of $169,929 and non-negotiable time deposits of $10,780 as of March 31, 2013.

(2)	The long-term investments presented in the table above do not include non-negotiable time deposits of $53 as of March 31, 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.

Other Liabilities

3 Months Ended

Mar. 31, 2013

Other Liabilities Disclosure [Abstract]

Other Liabilities

10)	Other Liabilities


	March 31, 2013		December 31, 2012
Other Current Liabilities:
Product warranties	$	7,533	$	8,266
Deferred revenue		7,143		9,280
Other		19,366		19,859

Total other current liabilities	$	34,042	$	37,405

Other Liabilities:
Long-term income tax payable	$	21,123	$	20,880
Accrued compensation		19,620		18,750
Other		4,870		3,745

Total other liabilities	$	45,613	$	43,375

Business Segment, Geographic Area, Product and Significant Customer Information

3 Months Ended

Mar. 31, 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 March 31,
	2013			2012
Advanced Manufacturing Capital Equipment	$	105,327		$	143,223
Analytical Solutions Group		14,396			15,793
Europe Region Sales & Service Operations⁽¹⁾		11,646			12,206
Asia Region Sales & Service Operations⁽¹⁾		47,353			72,097
Corporate, Eliminations and Other		(37,077	)		(52,451	)

	$	141,645		$	190,868

(1)

The following is gross profit by reportable segment:


	Three Months Ended March 31,
	2013		2012
Advanced Manufacturing Capital Equipment	$	34,836	$	57,838
Analytical Solutions Group		7,448		8,100
Europe Region Sales & Service Operations⁽¹⁾		3,191		4,151
Asia Region Sales & Service Operations⁽¹⁾		8,831		11,861
Corporate, Eliminations and Other		396		1,841

	$	54,702	$	83,791

(1)

The following is capital expenditures by reportable segment for the three months ended March 31, 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 March 31, 2013:
Capital expenditures	$	2,612	$	111	$	15	$	63	$	555	$	3,356


	Product Groups				Foreign Sales & Service Operations
	Advanced Manufacturing Capital Equipment		Analytical Solutions Group		Europe		Asia		Corporate, Eliminations and Other		Total
Three Months Ended March 31, 2012:
Capital expenditures	$	3,176	$	115	$	45	$	292	$	939	$	4,567

The following is depreciation and amortization by reportable segment for the three months ended March 31, 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 March 31, 2013:
Depreciation and amortization	$	2,941	$	243	$	74	$	294	$	540	$	4,092


	Product Groups				Foreign Sales & Service Operations
	Advanced Manufacturing Capital Equipment		Analytical Solutions Group		Europe		Asia		Corporate, Eliminations and Other		Total
Three Months Ended March 31, 2012:
Depreciation and amortization	$	2,138	$	199	$	81	$	369	$	356	$	3,143

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
March 31, 2013:
Segment assets:
Accounts receivable	$	13,696	$	5,497	$	5,865	$	33,413	$	31,986		$	90,457
Inventory		106,872		3,975		3,770		24,367		(7,731	)		131,253

Total segment assets	$	120,568	$	9,472	$	9,635	$	57,780	$	24,255		$	221,710


	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	$	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

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


	March 31, 2013		December 31, 2012
Total segment assets	$	221,710	$	216,699
Cash and cash equivalents and investments		608,499		627,399
Other current assets		38,593		36,242
Property, plant and equipment, net		79,709		80,516
Goodwill and intangible assets, net		164,090		162,294
Other assets		12,807		11,692

Consolidated total assets	$	1,125,408	$	1,134,842

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 March 31,
	2013		2012
Instruments and Control Products	$	60,028	$	77,481
Power and Reactive Gas Products		52,063		77,566
Vacuum Products		15,158		20,028
Analytical Solutions Group Products		14,396		15,793

	$	141,645	$	190,868

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 March 31,
	2013		2012
Net revenues
United States	$	74,567	$	95,104
Japan		13,829		33,433
Europe		18,803		21,985
Asia (excluding Japan)		34,446		40,346

	$	141,645	$	190,868


	March 31, 2013		December 31, 2012
Long-lived assets⁽¹⁾
United States	$	62,536	$	62,203
Japan		2,237		2,562
Europe		5,215		5,844
Asia (excluding Japan)		11,621		12,102

	$	81,609	$	82,711

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

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 March 31,
	2013			2012
Customer A		14.7	%		14.9	%
Customer B		9.6	%		10.8	%

- 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

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

+ Details

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($)
shares in Thousands, $ in Thousands

3 Months Ended

Mar. 31, 2013

Mar. 31, 2012

Net revenues:

Products

$ 116,611

$ 164,488

Services

25,034

26,380

Total net revenues

141,645

190,868

Cost of revenues:

Cost of products

70,575

91,024

Cost of services

16,368

16,053

Total cost of revenues

86,943

107,077

Gross profit

54,702

83,791

Research and development

15,248

16,184

Selling, general and administrative

34,173

34,119

Completed acquisition costs

171

Amortization of intangible assets

434

119

Income from operations

4,676

33,369

Interest income

305

261

Interest expense

Income before income taxes

4,967

33,621

(Benefit) provision for income taxes

(794)

10,853

Net income

5,761

22,768

Other comprehensive (loss) income:

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

^[1]

1,011

641

Foreign currency translation adjustments, net of tax of $0 for the three months ended March 31, 2013 and 2012, respectively

(8,340)

301

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

^[2]

(16)

(41)

Total comprehensive (loss) income

$ (1,584)

$ 23,669

Net income per share:

Basic

$ 0.11

$ 0.43

Diluted

0.11

0.43

Cash dividends per common share

$ 0.16

$ 0.15

Weighted average common shares outstanding:

Basic

52,773

52,504

Diluted

53,359

53,222

[1]	Tax expense was $605 and $413 for the three months ended March 31, 2013 and 2012, respectively.
[2]	Tax benefit was $(10) and $(27) for the three months ended March 31, 2013 and 2012, respectively.

Other Liabilities - Schedule of Other Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2013	Dec. 31, 2012
Other Current Liabilities:
Product warranties	$ 7,533	$ 8,266
Deferred revenue	7,143	9,280
Other	19,366	19,859
Total other current liabilities	34,042	37,405
Other Liabilities:
Long-term income tax payable	21,123	20,880
Accrued compensation	19,620	18,750
Other	4,870	3,745
Total other liabilities	$ 45,613	$ 43,375

Business Segment, Geographic Area, Product and Significant Customer Information - Worldwide Net Revenue for Each Group of Products (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenue from External Customer [Line Items]
Net sales from product groups	$ 141,645	$ 190,868
Instruments and Control Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	60,028	77,481
Power and Reactive Gas Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	52,063	77,566
Vacuum Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	15,158	20,028
Analytical Solutions Group Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	$ 14,396	$ 15,793

Income Taxes

3 Months Ended

Mar. 31, 2013

Income Tax Disclosure [Abstract]

Income Taxes

13)	Income Taxes

The Company’s effective tax rate for the three months ended March 31, 2013 and 2012 was (16.0)% and 32.3%, respectively. The effective tax rate for the three months ended March 31, 2013, which was a benefit, was lower than the U.S. statutory tax rate due to certain tax incentives realized by the Company related to the year ended December 31, 2012, and recognized as discrete events in the quarter. These incentives were reinstated retroactively under The American Taxpayer Relief Act of 2012 that was signed into law on January 2, 2013, and reduced the effective tax rate for the three months ended March 31, 2013 by approximately 47%. The effective tax rate for the three months ended March 31, 2012, and the related income tax expense was lower than the U.S. statutory tax rate primarily due to 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 March 31, 2013, the total amount of gross unrecognized tax benefits, which excludes interest and penalties, was approximately $41,134. 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. If these benefits were recognized in a future period, the timing of which is not estimable, the net unrecognized tax benefit of $20,038, excluding interest and penalties, would impact the Company’s effective tax rate as of March 31, 2013. 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 March 31, 2013 and December 31, 2012, the Company had accrued interest on unrecognized tax benefits of approximately $1,771 and $1,571, respectively.

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 open tax years through 2009 during the quarter ended June 30, 2012. The statute of limitations in the Company’s other tax jurisdictions remain open between fiscal year 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.

- Definition

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

+ References

+ Details

Product Warranties - Product Warranty Activities (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Product Warranties Disclosures [Abstract]
Beginning balance	$ 8,266	$ 8,315
Provision for product warranties	630	692
Direct charges to warranty liability	(1,250)	(1,462)
Foreign currency translation	(113)
Ending balance	$ 7,533	$ 7,545

Inventories (Tables)

3 Months Ended

Mar. 31, 2013

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories consist of the following:


	March 31, 2013		December 31, 2012
Raw materials	$	75,752	$	76,610
Work-in-process		19,708		19,708
Finished goods		35,793		38,321

	$	131,253	$	134,639

Investments

3 Months Ended

Mar. 31, 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:


	March 31, 2013		December 31, 2012
Available-for-sale investments:
Time deposits	$	—	$	52
Bankers’ acceptance drafts		93		242
U.S. treasury obligations		13,042		13,054
U.S. agency obligations		317,686		313,514

	$	330,821	$	326,862

Trading investments:
Mutual funds		813		791

	$	331,634	$	327,653

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


	March 31, 2013		December 31, 2012
Time deposits	$	53	$	—
U.S. agency obligations		10,104		12,158

	$	10,157	$	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:


	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
As of March 31, 2013:
Short-term investments:
Bankers’ acceptance drafts	$	93	$	—	$	—		$	93
U.S. treasury obligations		13,036		6		—			13,042
U.S. agency obligations		317,517		171		(2	)		317,686

	$	330,646	$	177	$	(2	)	$	330,821

Long-term investments:
Time deposits	$	53	$	—	$	—		$	53
U.S. agency obligations		10,099		5		—			10,104

	$	10,152	$	5	$	—		$	10,157


	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
As of December 31, 2012:
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 months ended March 31, 2013 and 2012, respectively.

The unrealized gains and losses for trading investments were immaterial for the three months ended March 31, 2013 and 2012.

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-Glossary Debt Security
-URI http://asc.fasb.org/extlink&oid=6509901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=6511694

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Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 3, 19, 20, 21, 22, 137
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Derivatives

3 Months Ended

Mar. 31, 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 March 31, 2013 and December 31, 2012, the Company had outstanding forward foreign exchange contracts with gross notional values of $26,596 and $41,448, respectively. The following tables provide a summary of the primary net hedging positions and corresponding fair values held as of March 31, 2013 and December 31, 2012:


	March 31, 2013
Currency Hedged (Buy/Sell)	Gross Notional Value		Fair Value⁽¹⁾ Asset/(Liability)
U.S. Dollar/Japanese Yen	$	8,962	$	1,291
U.S. Dollar/South Korean Won		12,684		(183	)
U.S. Dollar/Euro		2,669		38
U.S. Dollar/U.K. Pound Sterling		2,281		120

Total	$	26,596	$	1,266


	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	March 31, 2013			December 31, 2012
Derivative assets:
Forward exchange contracts	$	1,566		$	961
Derivative liabilities:
Forward exchange contracts		(300	)		(1,310	)

Total net derivative asset (liability) designated as hedging instruments⁽¹⁾	$	1,266		$	(349	)

(1)

The derivative assets of $1,566 and derivative liabilities of $300 are classified in other current assets and other current liabilities, respectively, in the consolidated balance sheet as of March 31, 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 gross in the balance sheet.

The net amount of existing gains as of March 31, 2013 that is expected to be reclassified from accumulated OCI into earnings within the next twelve months is not material.

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


	Three Months Ended March 31,
Derivatives Designated as Cash Flow Hedging Relationships	2013		2012
Forward exchange contracts:
Net gain recognized in OCI⁽¹⁾	$	1,779	$	1,334
Net gain (loss) reclassified from OCI into income⁽²⁾		203		(513	)

(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 months ended March 31, 2013 and in selling, general and administrative expenses for the three months ended March 31, 2012.

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


	Three Months Ended March 31,
Derivatives Not Designated as Hedging Instruments	2013		2012
Forward exchange contracts:
Net gain recognized in income⁽¹⁾	$	491	$	—

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

+ References

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

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

+ Details

Debt - Additional Information (Detail) $ in Thousands	3 Months Ended
Debt - Additional Information (Detail) $ in Thousands	Mar. 31, 2013 USD ($) Institution	Dec. 31, 2012 USD ($)
Alter Power Systems [Member]
Debt [Line Items]
Number of financial institutions for available lines of credit and borrowing arrangements \| Institution	4
Maturity dates of financial institutions	2013 through 2015
Japan line of credit [Member]
Debt [Line Items]
Number of financial institutions for available lines of credit and borrowing arrangements	2
Aggregate borrowings expire and renewed	3 month intervals
Aggregate borrowings	$ 24,424
Debt instrument maximum interest rate	0.63%
Debt instrument minimum interest rate	1.475%
Total borrowings outstanding	$ 0	$ 0
Plasmart line of credit [Member]
Debt [Line Items]
Aggregate borrowings	1,349
Total borrowings outstanding	$ 0	$ 0
Average interest rate on borrowings	5.19%
Line of credit facility expiration year	2014
Lines of credit [Member] \| Alter Power Systems [Member]
Debt [Line Items]
Aggregate borrowings	$ 872
Lines of credit [Member] \| Alter Power Systems [Member] \| Minimum [Member]
Debt [Line Items]
Average interest rate on borrowings	6.66%
Lines of credit [Member] \| Alter Power Systems [Member] \| Maximum [Member]
Debt [Line Items]
Average interest rate on borrowings	7.75%
Term loan [Member] \| Alter Power Systems [Member]
Debt [Line Items]
Aggregate borrowings	$ 564
Total borrowings outstanding	$ 791
Term loan [Member] \| Alter Power Systems [Member] \| Minimum [Member]
Debt [Line Items]
Average interest rate on borrowings	1.34%
Term loan [Member] \| Alter Power Systems [Member] \| Maximum [Member]
Debt [Line Items]
Average interest rate on borrowings	4.23%

Derivatives - Summary of Gains on Derivatives Not Designated as Hedging Instruments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Derivative Not Designated as Hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gain recognized in income	$ 491

Acquisition (Tables)

3 Months Ended

Mar. 31, 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	$	1,608
Property and equipment		211
Intangible assets		3,093


Total assets acquired		4,912
Debt (Note 11)		791
Deferred taxes and other liabilities		1,667

Total liabilities assumed		2,458

Total purchase price	$	2,454

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.


Current developed technology	$	2,495	9 year useful life
Trade names		598	3 year useful life

	$	3,093

Other Assets - Schedule of Other Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2013	Dec. 31, 2012
Other Current Assets:
Income tax receivable	$ 12,513	$ 12,768
Other	17,495	15,280
Total other current assets	30,008	28,048
Other Assets:
Deferred tax assets, net	10,907	9,497
Other	1,900	2,195
Total other assets	$ 12,807	$ 11,692

- Definition

Amount after allocation of valuation allowances of noncurrent deferred tax asset attributable to deductible temporary differences and carryforwards. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).

+ References + Details

- Definition

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

+ References + Details

Derivatives (Tables)

3 Months Ended

Mar. 31, 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 March 31, 2013 and December 31, 2012:


	March 31, 2013
Currency Hedged (Buy/Sell)	Gross Notional Value		Fair Value⁽¹⁾ Asset/(Liability)
U.S. Dollar/Japanese Yen	$	8,962	$	1,291
U.S. Dollar/South Korean Won		12,684		(183	)
U.S. Dollar/Euro		2,669		38
U.S. Dollar/U.K. Pound Sterling		2,281		120

Total	$	26,596	$	1,266


	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	March 31, 2013			December 31, 2012
Derivative assets:
Forward exchange contracts	$	1,566		$	961
Derivative liabilities:
Forward exchange contracts		(300	)		(1,310	)

Total net derivative asset (liability) designated as hedging instruments⁽¹⁾	$	1,266		$	(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 March 31,
Derivatives Designated as Cash Flow Hedging Relationships	2013		2012
Forward exchange contracts:
Net gain recognized in OCI⁽¹⁾	$	1,779	$	1,334
Net gain (loss) reclassified from OCI into income⁽²⁾		203		(513	)

(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 months ended March 31, 2013 and in selling, general and administrative expenses for the three months ended March 31, 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 March 31,
Derivatives Not Designated as Hedging Instruments	2013		2012
Forward exchange contracts:
Net gain recognized in income⁽¹⁾	$	491	$	—

(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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
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-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579240-113959

Reference 9: 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 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(n)(2))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 11: 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

+ Details

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income	$ 5,761	$ 22,768
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,092	3,143
Stock-based compensation	3,798	3,300
Provision for excess and obsolete inventory	3,161	4,263
Deferred income taxes	1,228	1,032
Excess tax benefits from stock-based compensation	(199)	(657)
Other	936	532
Changes in operating assets and liabilities:
Trade accounts receivable	(10,348)	(12,217)
Inventories	(347)	578
Income taxes	(3,253)	3,648
Other current assets	(1,801)	3,519
Accrued compensation and other liabilities	(4,884)	(187)
Accounts payable	4,512	(2,289)
Other non-current assets/liabilities	(193)
Net cash provided by operating activities	2,463	27,433
Cash flows from investing activities:
Acquisition of business	(1,963)
Purchases of investments	(88,525)	(101,257)
Maturities of investments	84,145	105,473
Sales of investments	2,371	15,941
Purchases of property, plant and equipment	(3,356)	(4,567)
Other	130	(146)
Net cash (used in) provided by investing activities	(7,198)	15,444
Cash flows from financing activities:
Proceeds from short-term borrowings	6	2,896
Payments on short-term borrowings		(4,401)
Repurchase of common stock	(1,668)	(3,721)
Net (payments) proceeds related to employee stock awards	(1,251)	19
Dividend payments to common stockholders	(8,448)	(7,877)
Excess tax benefits from stock-based compensation	199	657
Net cash (used in) financing activities	(11,162)	(12,427)
Effect of exchange rate changes on cash and cash equivalents	(4,983)	2,307
(Decrease) increase in cash and cash equivalents	(20,880)	32,757
Cash and cash equivalents at beginning of period	287,588	312,916
Cash and cash equivalents at end of period	$ 266,708	$ 345,673

Derivatives - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Maximum period for hedging a portion of forecasted foreign currency denominated intercompany sales of inventory	18 months
Gross notional values of outstanding forward foreign exchange contracts	$ 26,596	$ 41,448

Other Liabilities (Tables)

3 Months Ended

Mar. 31, 2013

Other Liabilities Disclosure [Abstract]

Schedule of Other Liabilities


	March 31, 2013		December 31, 2012
Other Current Liabilities:
Product warranties	$	7,533	$	8,266
Deferred revenue		7,143		9,280
Other		19,366		19,859

Total other current liabilities	$	34,042	$	37,405

Other Liabilities:
Long-term income tax payable	$	21,123	$	20,880
Accrued compensation		19,620		18,750
Other		4,870		3,745

Total other liabilities	$	45,613	$	43,375

Derivatives - Summary of Fair Value Amounts of Company's Derivative Instruments (Detail) - USD ($) $ in Thousands	Mar. 31, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Forward exchange contracts, Assets	$ 1,566	$ 961
Forward exchange contracts, Liabilities	(300)	(1,310)
Total net derivative asset (liability) designated as hedging instruments	1,266	(349)
Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Forward exchange contracts, Assets	1,566	961
Forward exchange contracts, Liabilities	(300)	(1,310)
Total net derivative asset (liability) designated as hedging instruments	$ 1,266	$ (349)

Stockholder's Equity - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands	1 Months Ended	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2013	Mar. 31, 2012
Equity [Abstract]
Common stock, value of shares authorized to repurchase		$ 200,000,000
Stock repurchase, shares		61
Value of shares repurchased		$ 1,668,000
Average price of repurchased shares		$ 27.35
Cash dividend to be paid	$ 0.16	$ 0.16	$ 0.15
Dividend payment to common shareholders		$ 8,448,000	$ 7,877,000
Dividend declared date			May 06, 2013
Dividend to be paid date			Jun. 14, 2013
Dividend declared, shareholders of record date			Jun. 03, 2013

Investments - Schedule of Fair Value of Available for Sale of Investments (Detail) - USD ($) $ in Thousands	Mar. 31, 2013	Dec. 31, 2012
Schedule Of Available For Sale And Trading Securities [Line Items]
Fair value of short-term available-for-sale investments	$ 330,821	$ 326,862
Fair value of long-term available-for-sale investments	10,157	12,158
Fair value of short-term investments	331,634	327,653
Time deposits [Member]
Schedule Of Available For Sale And Trading Securities [Line Items]
Fair value of short-term available-for-sale investments		52
Fair value of long-term available-for-sale investments	53
Bankers' acceptance drafts [Member]
Schedule Of Available For Sale And Trading Securities [Line Items]
Fair value of short-term available-for-sale investments	93	242
U.S. treasury obligations [Member]
Schedule Of Available For Sale And Trading Securities [Line Items]
Fair value of short-term available-for-sale investments, U.S. agency obligations	13,042	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, U.S. agency obligations	317,686	313,514
Fair value of long-term available-for-sale investments	10,104	12,158
Mutual funds [Member]
Schedule Of Available For Sale And Trading Securities [Line Items]
Fair value of short-term investments, mutual funds	$ 813	$ 791

Goodwill and Intangible Assets - Goodwill (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 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	(393)	660
Goodwill gross carrying amount, Ending balance	289,754	290,147
Accumulated Impairment Loss, Beginning balance	(139,414)	(139,414)
Acquired goodwill, impairment loss
Foreign currency translation
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	(393)	660
Goodwill, net, Ending balance	$ 150,340	$ 150,733

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Income Taxes [Line Items]
Effective tax rate	(16.00%)	32.30%
Gross unrecognized tax benefits excluding interest and penalties	$ 41,134		$ 40,674
Net unrecognized tax benefit excluding interest and penalties that would impact effective tax rate	20,038
Accrued interest on unrecognized tax benefits	$ 1,771		$ 1,571
American Taxpayer Relief Act of 2012 [Member]
Income Taxes [Line Items]
Reduction in effective income tax rate	47.00%

Fair Value Measurements

3 Months Ended

Mar. 31, 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 in active markets for identical assets or liabilities as of the reporting date. Active markets are those in which transactions for the asset or liability occur in sufficient frequency and volume to provide pricing information on an ongoing basis.

		Level 2		Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 assets and liabilities include debt securities with quoted prices that are traded less frequently than exchange-traded instruments or securities or derivative contracts that are valued using a pricing model with inputs that are observable in the market or can be derived principally from or corroborated by observable market data.

		Level 3		Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation.

In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, 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.

Assets and liabilities of the Company are measured at fair value on a recurring basis as of March 31, 2013 and are summarized as follows:


			Fair Value Measurements at Reporting Date Using
Description	Total March 31, 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	$	85,863	$	85,863	$	—	$	—
Bankers’ acceptance drafts		136		—		136		—
Trading securities:
Mutual funds		813		813		—		—
Available-for-sale securities:
Bankers’ acceptance drafts		93		—		93		—
U.S. treasury obligations		13,042		—		13,042		—
U.S. agency obligations		327,790		302,684		25,106		—
Derivatives – currency forward contracts		1,566		—		1,566		—

Total assets	$	429,303	$	389,360	$	39,943	$	—

Liabilities:
Derivatives – currency forward contracts	$	300	$	—	$	300	$	—

Reported as follows:
Assets:
Cash and cash equivalents⁽¹⁾	$	85,999	$	85,863	$	136	$	—
Short-term investments		331,634		293,393		38,241		—
Other current assets		1,566		—		1,566		—

Total current assets	$	419,199	$	379,256	$	39,943	$	—

Long-term investments⁽²⁾	$	10,104	$	10,104	$	—	$	—

Liabilities:
Other current liabilities	$	300	$	—	$	300	$	—

(1)	The cash and cash equivalent amounts presented in the table above do not include cash of $169,929 and non-negotiable time deposits of $10,780 as of March 31, 2013.

(2)	The long-term investments presented in the table above do not include non-negotiable time deposits of $53 as of March 31, 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.

Money Market Funds

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

Trading Mutual Fund Investments

As of March 31, 2013 and December 31, 2012, trading investments consisted 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

As of March 31, 2013 and December 31, 2012, 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. The Company’s available-for-sale investments are classified within Level 1 and Level 2 of the fair value hierarchy.

Derivatives

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

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13504-108611

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15B
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44A, 44B
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 159
-Paragraph 17-22, 27, 28
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15C, 15D
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32, 33, 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 3, 10, 14, 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Investments - Gains Unrealized Gains and (Losses) Aggregated by Investment Category Short-Term and Long-Term Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Short-term investments, Cost	$ 330,646	$ 326,601
Short-term investments, Gross Unrealized Gains	177	267
Short-term investments, Gross Unrealized (Losses)	(2)	(6)
Short-term investments, Estimated Fair Value	330,821	326,862
Long-term investments, Cost	10,152
Long-term investments, Gross Unrealized Gains	5
Long-term investments, Gross Unrealized (Losses)
Long-term investments, Estimated Fair Value	10,157	12,158
U.S. agency obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments, Cost	317,517	313,262
Short-term investments, Gross Unrealized Gains	171	258
Short-term investments, Gross Unrealized (Losses)	(2)	(6)
Short-term investments, Estimated Fair Value	317,686	313,514
Long-term investments, Cost	10,099	12,156
Long-term investments, Gross Unrealized Gains	5	2
Long-term investments, Gross Unrealized (Losses)
Long-term investments, Estimated Fair Value	10,104	12,158
Time deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments, Cost		52
Short-term investments, Gross Unrealized Gains
Short-term investments, Gross Unrealized (Losses)
Short-term investments, Estimated Fair Value		52
Long-term investments, Cost	53
Long-term investments, Gross Unrealized Gains
Long-term investments, Gross Unrealized (Losses)
Long-term investments, Estimated Fair Value	53
Bankers' acceptance drafts [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments, Cost	93	242
Short-term investments, Gross Unrealized Gains
Short-term investments, Gross Unrealized (Losses)
Short-term investments, Estimated Fair Value	93	242
U.S. treasury obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments, Cost	13,036	13,045
Short-term investments, Gross Unrealized Gains	6	9
Short-term investments, Gross Unrealized (Losses)
Short-term investments, Estimated Fair Value	$ 13,042	$ 13,054

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
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Operating Statistics [Line Items]
Capital expenditures	$ 3,356	$ 4,567
Depreciation and amortization	4,092	3,143
Accounts receivable	90,457		$ 82,060
Inventory	131,253		134,639
Total segment assets	221,710		216,699
Advanced Manufacturing Capital Equipment [Member]
Operating Statistics [Line Items]
Capital expenditures	2,612	3,176
Depreciation and amortization	2,941	2,138
Accounts receivable	13,696		9,644
Inventory	106,872		108,397
Total segment assets	120,568		118,041
Analytical Solutions Group [Member]
Operating Statistics [Line Items]
Capital expenditures	111	115
Depreciation and amortization	243	199
Accounts receivable	5,497		5,889
Inventory	3,975		3,841
Total segment assets	9,472		9,730
Europe Region Sales & Service Operations [Member]
Operating Statistics [Line Items]
Capital expenditures	15	45
Depreciation and amortization	74	81
Accounts receivable	5,865		5,813
Inventory	3,770		3,691
Total segment assets	9,635		9,504
Asia Region Sales & Service Operations [Member]
Operating Statistics [Line Items]
Capital expenditures	63	292
Depreciation and amortization	294	369
Accounts receivable	33,413		32,088
Inventory	24,367		29,534
Total segment assets	57,780		61,622
Corporate, Eliminations and Other [Member]
Operating Statistics [Line Items]
Capital expenditures	555	939
Depreciation and amortization	540	$ 356
Accounts receivable	31,986		28,626
Inventory	(7,731)		(10,824)
Total segment assets	$ 24,255		$ 17,802

Net Income Per Share - Additional Information (Detail) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Earnings Per Share [Abstract]
Stock options and restricted stock units outstanding	1,261
Number of shares excluded from computation of diluted earnings per share	98	97

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Antidilution
-URI http://asc.fasb.org/extlink&oid=6505113

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Diluted Earnings Per Share
-URI http://asc.fasb.org/extlink&oid=6510752

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Contingent Stock Agreement
-URI http://asc.fasb.org/extlink&oid=6508534

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 13, 14
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill

The changes in the carrying amount of goodwill and accumulated impairment losses during the three months ended March 31, 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		(393	)		—			(393	)		660		—			660

Ending balance at March 31, 2013 and December 31, 2012	$	289,754		$	(139,414	)	$	150,340		$	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 March 31, 2013:
Completed technology⁽¹⁾	$	84,579	$	(77,391	)	$	(8	)	$	7,180
Customer relationships		14,571		(9,125	)		109			5,555
Patents, trademarks, trade names and other⁽¹⁾		25,636		(24,634	)		13			1,015

	$	124,786	$	(111,150	)	$	114		$	13,750

(1)	In March 2013, the Company purchased Alter for $2,454. The Company recorded $3,093 of separately identified intangible assets, of which $2,495 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

Estimated Amortization Expense

Estimated amortization expense for each of the remaining fiscal years is as follows:


Year	Amount
2013 (remaining)	$	1,536
2014		1,685
2015		1,668
2016		1,511
2017		1,469
2018		1,460
Thereafter		4,421

- Definition

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

+ References + Details

Inventories

3 Months Ended

Mar. 31, 2013

Inventory Disclosure [Abstract]

Inventories

6)	Inventories

Inventories consist of the following:


	March 31, 2013		December 31, 2012
Raw materials	$	75,752	$	76,610
Work-in-process		19,708		19,708
Finished goods		35,793		38,321

	$	131,253	$	134,639

Derivatives - Summary of Fair Value Amounts of Company's Derivative Instruments (Parenthetical) (Detail) - USD ($) $ in Thousands	Mar. 31, 2013	Dec. 31, 2012
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative assets classified in other current assets	$ 1,566	$ 961
Derivative liabilities classified in other current liabilities	$ 300	$ 1,310

Business Segment, Geographic Area, Product and Significant Customer Information - Company's Operations in Different Geographic Regions (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 141,645	$ 190,868
Long-lived assets	81,609		$ 82,711
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	74,567	95,104
Long-lived assets	62,536		62,203
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	13,829	33,433
Long-lived assets	2,237		2,562
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	18,803	21,985
Long-lived assets	5,215		5,844
Asia (excluding Japan) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	34,446	$ 40,346
Long-lived assets	$ 11,621		$ 12,102