MKS Instruments (MKSI) 10-Q 7 May 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2014	Apr. 30, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	31-Mar-14	'
Document Fiscal Year Focus	'2014	'
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	'	53,535,421

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$287,090	$288,902
Short-term investments	306,513	300,715
Trade accounts receivable, net	119,463	116,744
Inventories	147,511	142,727
Deferred income taxes	16,053	13,428
Other current assets	17,552	16,715
Assets classified as held for sale	1,427	'
Total current assets	895,609	879,231
Property, plant and equipment, net	75,517	77,536
Long-term investments	53,620	60,405
Goodwill	151,112	150,909
Intangible assets, net	12,519	13,090
Other assets	34,383	31,847
Total assets	1,222,760	1,213,018
Current liabilities:	'	'
Accounts payable	35,385	40,074
Accrued compensation	35,763	43,662
Income taxes payable	8,620	10,444
Other current liabilities	36,442	34,242
Total current liabilities	116,210	128,422
Other liabilities	60,782	63,073
Commitments and contingencies (Note 18)	'	'
Stockholders' equity:	'	'
Preferred Stock, $0.01 par value per share, 2,000,000 shares authorized; none issued and outstanding	'	'
Common Stock, no par value, 200,000,000 shares authorized; 53,456,493 and 53,363,450 shares issued and outstanding at March 31, 2014 and December 31, 2013, respectively	113	113
Additional paid-in capital	732,741	730,571
Retained earnings	301,147	278,966
Accumulated other comprehensive income	11,767	11,873
Total stockholders' equity	1,045,768	1,021,523
Total liabilities and stockholders' equity	$1,222,760	$1,213,018

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Statement Of Financial Position [Abstract]	'	'
Preferred Stock, par value	$0.01	$0.01
Preferred Stock, shares authorized	2,000,000	2,000,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common Stock, par value	$0	$0
Common Stock, shares authorized	200,000,000	200,000,000
Common Stock, shares issued	53,456,493	53,363,450
Common Stock, shares outstanding	53,456,493	53,363,450

Consolidated_Statements_of_Ope

Consolidated Statements of Operations and Comprehensive Income (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Net revenues:	'		'
Products	$181,186		$116,611
Services	25,167		25,034
Total net revenues	206,353		141,645
Cost of revenues:	'		'
Cost of products	100,211		70,575
Cost of services	16,770		16,368
Total cost of revenues	116,981		86,943
Gross profit	89,372		54,702
Research and development	15,618		15,248
Selling, general and administrative	34,591		34,133
Acquisition costs	228		171
Restructuring	747		40
Amortization of intangible assets	410		434
Income from operations	37,778		4,676
Interest income	252		305
Interest expense	17		14
Income before income taxes	38,013		4,967
Provision (benefit) for income taxes	6,768		-794
Net income	31,245		5,761
Other comprehensive income (loss):	'		'
Changes in value of financial instruments designated as cash flow hedges, net of tax (benefit) expense	-163	[1]	1,011	[1]
Foreign currency translation adjustments, net of tax of $0 for the three months ended March 31, 2014 and 2013	21		-8,340
Unrealized gain (loss) on investments, net of tax expense (benefit)	36	[2]	-16	[2]
Total comprehensive income (loss)	$31,139		($1,584)
Net income per share:	'		'
Basic	$0.58		$0.11
Diluted	$0.58		$0.11
Cash dividends per common share	$0.16		$0.16
Weighted average common shares outstanding:	'		'
Basic	53,411		52,773
Diluted	53,776		53,359
[1]	Tax (benefit) expense was $(108) and $605 for the three months ended March 31, 2014 and 2013, respectively.
[2]	Tax expense (benefit) was $24 and $(10) for the three months ended March 31, 2014 and 2013, respectively.

Consolidated_Statements_of_Ope1

Consolidated Statements of Operations and Comprehensive Income (Parenthetical) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]	'	'
Tax (benefit) expense on changes in value of financial instruments designated as cash flow hedges	($108)	$605
Tax on foreign currency translation adjustments	0	0
Tax (benefit) expense on unrealized gain (loss) on investments	$24	($10)

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:	'	'
Net income	$31,245	$5,761
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization	4,150	4,092
Stock-based compensation	3,198	3,798
Provision for excess and obsolete inventory	2,613	3,161
Provision for bad debt	94	969
Deferred income taxes	-3,974	1,228
Excess tax benefits from stock-based compensation	-189	-199
Other	-141	-33
Changes in operating assets and liabilities:	'	'
Trade accounts receivable	-2,784	-10,348
Inventories	-7,402	-347
Income taxes	-5,462	-3,253
Other current assets	-1,286	-1,801
Accrued compensation	-6,872	-2,271
Other current liabilities	2,512	-2,613
Accounts payable	-4,656	4,512
Other non-current assets	-1,143	-193
Net cash provided by operating activities	9,903	2,463
Cash flows from investing activities:	'	'
Acquisition of businesses, net of cash acquired	'	-1,963
Purchases of investments	-128,524	-88,525
Maturities of investments	104,623	84,145
Sales of investments	24,948	2,371
Purchases of property, plant and equipment	-3,098	-3,356
Other	79	130
Net cash used in investing activities	-1,972	-7,198
Cash flows from financing activities:	'	'
Proceeds from short-term borrowings	'	6
Repurchase of common stock	-945	-1,668
Net payments related to employee stock awards	-762	-1,251
Dividend payments to common stockholders	-8,553	-8,448
Excess tax benefits from stock-based compensation	189	199
Net cash used in financing activities	-10,071	-11,162
Effect of exchange rate changes on cash and cash equivalents	328	-4,983
Decrease in cash and cash equivalents	-1,812	-20,880
Cash and cash equivalents at beginning of period	288,902	287,588
Cash and cash equivalents at end of period	$287,090	$266,708

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2014
Accounting Policies [Abstract]	'
Basis of Presentation	'
	1)	Basis of Presentation
	The terms “MKS” and the “Company” refer to MKS Instruments, Inc. and its subsidiaries. The interim financial data as of March 31, 2014 and for the three months ended March 31, 2014 and 2013 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, 2013 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, 2013 filed with the Securities and Exchange Commission on February 26, 2014.
	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.

Recently_Issued_Accounting_Pro

Recently Issued Accounting Pronouncements	3 Months Ended
	Mar. 31, 2014
Accounting Changes And Error Corrections [Abstract]	'
Recently Issued Accounting Pronouncements	'
	2)	Recently Issued Accounting Pronouncements
	On July 18, 2013, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2013-11, “Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists.” Under the new standard, unrecognized tax benefits will be netted against all available same-jurisdiction loss or other tax carryforwards that would be utilized, rather than only against carryforwards that are created by unrecognized tax benefits. The provisions of this ASU are effective for interim and annual periods beginning on or after December 15, 2013. The adoption of ASU No. 2013-11 did not have a material effect on the Company’s consolidated financial statements.

Investments

Investments	3 Months Ended
	Mar. 31, 2014
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, 2014		December 31, 2013
	Available-for-sale investments:
	Bankers’ acceptance drafts	$	637	$	491
	Time deposits		3,442		3,439
	Commercial paper and certificates of deposit		127,524		114,984
	Corporate obligations		16,826		18,351
	U.S. agency obligations		158,084		162,450
			306,513		299,715
	Trading investments:
	Mutual funds		—		1,000
		$	306,513	$	300,715
	The fair value of long-term investments with maturities of more than one year consists of the following:
		March 31, 2014		December 31, 2013
	Available-for-sale investments:
	Time deposits	$	54	$	54
	U.S. agency obligations		53,566		60,351
		$	53,620	$	60,405
	The following tables show the gross unrealized gains and (losses) aggregated by investment category for short-term and long-term available-for-sale investments:
	As of March 31, 2014:	Cost		Gross		Gross			Estimated
				Unrealized		Unrealized			Fair Value
				Gains		(Losses)
	Short-term investments:
	Bankers’ acceptance drafts	$	637	$	—	$	—		$	637
	Time deposits		3,442		—		—			3,442
	Commercial paper and certificates of deposit		127,514		14		(4	)		127,524
	Corporate obligations		16,827		1		(2	)		16,826
	U.S. agency obligations		158,044		48		(8	)		158,084
		$	306,464	$	63	$	(14	)	$	306,513
	Long-term investments:
	Time deposits	$	54	$	—	$	—		$	54
	U.S. agency obligations		53,558		18		(10	)		53,566
		$	53,612	$	18	$	(10	)	$	53,620
	As of December 31, 2013:	Cost		Gross		Gross			Estimated
				Unrealized		Unrealized			Fair Value
				Gains		(Losses)
	Short-term investments:
	Available-for-sale investments:
	Time deposits	$	3,439	$	—	$	—		$	3,439
	Bankers’ acceptance drafts		491		—		—			491
	Commercial paper and certificates of deposit		114,973		15		(4	)		114,984
	Corporate obligations		18,360		—		(9	)		18,351
	U.S. agency obligations		162,430		22		(2	)		162,450
		$	299,693	$	37	$	(15	)	$	299,715
	Long-term investments:
	Time Deposits	$	54	$	—	$	—		$	54
	U.S. agency obligations		60,374		9		(32	)		60,351
		$	60,428	$	9	$	(32	)	$	60,405
	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, 2014 and 2013, respectively.
	The gains and losses for trading investments were immaterial for the three months ended March 31, 2014 and 2013.

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2014
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 assessed 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 or liability.
	Assets and liabilities of the Company are measured at fair value on a recurring basis as of March 31, 2014 and are summarized as follows:
					Fair Value Measurements at Reporting Date Using
	Description		Total		Quoted Prices in		Significant		Significant
			March 31, 2014		Active Markets		Other		Unobservable
					for Identical		Observable		Inputs
					Assets		Inputs		(Level 3)
					(Level 1)		(Level 2)
	Assets:
	Cash equivalents:
	Money market funds		$	60,742	$	60,742	$	—	$	—
	Bankers acceptance drafts			25		—		25		—
	Commercial paper and certificates of deposit			3,568		—		3,568		—
	Available-for-sale securities:
	Bankers’ acceptance drafts			637		—		637		—
	Time deposits			3,496		—		3,496		—
	Commercial paper and certificates of deposit			127,524		—		127,524		—
	Corporate obligations			16,826		—		16,826		—
	U.S. agency obligations			211,650		—		211,650		—
	Derivatives – currency forward contracts			401		—		401		—
	Total assets		$	424,869	$	60,742	$	364,127	$	—
	Liabilities:
	Derivatives – currency forward contracts		$	408	$	—	$	408	$	—
	Reported as follows:
	Assets:
	Cash and cash equivalents(1)		$	64,335	$	60,742	$	3,593	$	—
	Short-term investments			306,513		—		306,513		—
	Other current assets			401		—		401		—
	Total current assets		$	371,249	$	60,742	$	310,507	$	—
	Long-term investments		$	53,620	$	—	$	53,620	$	—
	Liabilities:
	Other current liabilities		$	408	$	—	$	408	$	—
	-1	The cash and cash equivalent amounts presented in the table above do not include cash of $211,210 and non-negotiable time deposits of $11,545 as of March 31, 2014.
	Assets and liabilities of the Company are measured at fair value on a recurring basis as of December 31, 2013 and are summarized as follows:
					Fair Value Measurements at Reporting Date Using
	Description		Total		Quoted Prices in		Significant Other		Significant
			December 31, 2013		Active Markets for		Observable		Unobservable
					Identical Assets		Inputs		Inputs
					(Level 1)		(Level 2)		(Level 3)
	Assets:
	Cash equivalents:
	Money market funds		$	38,166	$	38,166	$	—	$	—
	Bankers acceptance drafts			32		—		32		—
	Commercial paper and certificates of deposit			10,400		—		10,400		—
	Trading securities:
	Mutual funds			1,000		1,000		—		—
	Available-for-sale securities:
	Time deposits			3,493		—		3,493		—
	Bankers acceptance drafts			491		—		491		—
	Commercial paper and certificates of deposit			114,984		—		114,984		—
	Corporate obligations			18,351		—		18,351		—
	U.S. agency obligations			222,801		—		222,801		—
	Derivatives – currency forward contracts			920		—		920		—
	Total assets		$	410,638	$	39,166	$	371,472	$	—
	Liabilities:
	Derivatives – currency forward contracts		$	656	$	—	$	656	$	—
	Reported as follows:
Assets:
Cash and cash equivalents (1)		$	48,598	$	38,166	$	10,432	$	—
Short-term investments			300,715		1,000		299,715		—
Other current assets			920		—		920		—
Total current assets		$	350,233	$	39,166	$	311,067	$	—
Long-term investments		$	60,405	$	—	$	60,405	$	—
Liabilities:
Other current liabilities		$	656	$	—	$	656	$	—
-1	The cash and cash equivalent amounts presented in the table above do not include cash of $234,675 and non-negotiable time deposits of $5,629 as of December 31, 2013.
Money Market Funds
Money market funds are cash and cash equivalents and are classified within Level 1 of the fair value hierarchy.
Trading Securities
As of December 31, 2013, trading securities 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
Available-for-sale investments consisted of time deposits and drafts denominated in the Euro currency, commercial paper, certificates of deposit, corporate obligations, U.S. treasury obligations and U.S. agency obligations. The Company measures its debt and equity investments at fair value.
Derivatives
As a result of the Company’s global operating activities, the Company is exposed to market risks from changes in foreign currency exchange rates, which may adversely affect its operating results and financial position. When deemed appropriate, the Company minimizes its risks from foreign currency exchange rate fluctuations through the use of derivative financial instruments. The principal market in which the Company executes its foreign currency contracts is the institutional market in an over-the-counter environment with a relatively high level of price transparency. The market participants usually are large commercial banks. The forward foreign currency exchange contracts are valued using broker quotations, or market transactions and are classified within Level 2 of the fair value hierarchy.

Derivatives

Derivatives	3 Months Ended
	Mar. 31, 2014
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, 2014 and December 31, 2013, the Company had outstanding forward foreign exchange contracts with gross notional values of $36,893 and $21,018, respectively. The following tables provide a summary of the primary net hedging positions and corresponding fair values held as of March 31, 2014 and December 31, 2013:
			March 31, 2014
	Currency Hedged (Buy/Sell)		Gross Notional			Fair Value(1)
			Value			Asset/(Liability)
	U.S. Dollar/Japanese Yen		$	14,995		$	345
	U.S. Dollar/South Korean Won			15,037			(258	)
	U.S. Dollar/Euro			4,344			(51	)
	U.S. Dollar/U.K. Pound Sterling			2,517			(43	)
	Total		$	36,893		$	(7	)
	-1	Represents the fair value of the net asset / (liability) amount included in the consolidated balance sheets.
			December 31, 2013
	Currency Hedged (Buy/Sell)		Gross Notional			Fair Value(1)
			Value			Asset/(Liability)
	U.S. Dollar/Japanese Yen		$	7,191		$	920
	U.S. Dollar/South Korean Won			9,254			(521	)
	U.S. Dollar/Euro			2,806			(85	)
	U.S. Dollar/U.K. Pound Sterling			1,767			(50	)
	Total		$	21,018		$	264
	-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, 2014			December 31, 2013
	Derivative assets:
	Forward exchange contracts		$	401		$	920
	Derivative liabilities:
	Forward exchange contracts			(408	)		(656	)
	Total net derivative asset (liability) designated as hedging instruments(1)		$	(7	)	$	264
	-1	The derivative assets of $401 and derivative liabilities of $408 are classified in other current assets and other current liabilities, respectively, in the consolidated balance sheet as of March 31, 2014. The derivative asset of $920 and derivative liability of $656 are classified in other current assets and other current liabilities, respectively, in the consolidated balance sheet as of December 31, 2013. These foreign exchange contracts are subject to a master netting agreement with one financial institution. However, the Company has elected to record these contracts on a gross basis in the balance sheet.
	The net amount of existing losses as of March 31, 2014 that is expected to be reclassified from accumulated OCI into earnings within the next twelve months is immaterial.
	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		2014			2013
	Forward exchange contracts:
	Net (loss) gain recognized in OCI(1)		$	(334	)	$	1,779
	Net (loss) gain reclassified from OCI into income(2)		$	(94	)		203
	-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, 2014 and 2013.
	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		2014			2013
	Forward exchange contracts:
	Net gain recognized in income(1)		$	106		$	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.

Inventories

Inventories	3 Months Ended
	Mar. 31, 2014
Inventory Disclosure [Abstract]	'
Inventories	'
	6)	Inventories
	Inventories consist of the following:
		March 31, 2014		December 31, 2013
	Raw materials	$	76,520	$	75,687
	Work-in-process		23,140		24,304
	Finished goods		47,851		42,736
		$	147,511	$	142,727

Acquisitions

Acquisitions	3 Months Ended
	Mar. 31, 2014
Business Combinations [Abstract]	'
Acquisitions	'
	7)	Acquisitions
	Granville-Phillips
	On March 18, 2014, the Company announced an agreement to purchase the assets of Granville-Phillips, a division of Brooks Automation, Inc., for $87,000 in cash. Granville-Phillips is a leading global provider of vacuum measurement and control instruments to the semiconductor, thin film and general industrial markets with sales of approximately $30,000 in 2013. The acquisition aligns with the Company’s current strategy to grow its semiconductor business, while diversifying into other high growth advanced markets. Presuming regulatory approvals and other customary closing conditions are met, the acquisition is expected to close in the second quarter of 2014.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	3 Months Ended
	Mar. 31, 2014
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, 2013, the Company performed its annual impairment assessment of goodwill and determined that there was no impairment.
	The changes in the carrying amount of goodwill and accumulated impairment (loss) during the three months ended March 31, 2014 and twelve months ended December 31, 2013 were as follows:
			2014									2013
			Gross			Accumulated			Net			Gross		Accumulated			Net
			Carrying			Impairment						Carrying		Impairment
			Amount			(Loss)						Amount		(Loss)
	Beginning balance at January 1		$	290,323		$	(139,414	)	$	150,909		$	290,147	$	(139,414	)	$	150,733
	Acquired goodwill(1)			381			—			381			—		—			—
	Foreign currency translation			(178	)		—			(178	)		176		—			176
	Ending balance at March 31, 2014 and December 31, 2013		$	290,526		$	(139,414	)	$	151,112		$	290,323	$	(139,414	)	$	150,909
	-1	During the three months ended March 31, 2014, the Company recorded a purchase accounting adjustment for $381 related to the March 12, 2013 purchase of Alter S.r.l.
	Intangible Assets
	Components of the Company’s intangible assets are comprised of the following:
	As of March 31, 2014:		Gross			Accumulated			Foreign			Net
						Amortization			Currency
									Translation
	Completed technology		$	84,680		$	(78,277	)	$	445		$	6,848
	Customer relationships			14,571			(9,983	)		372			4,960
	Patents, trademarks, trade names and other			25,636			(25,004	)		79			711
			$	124,887		$	(113,264	)	$	896		$	12,519
	As of December 31, 2013:		Gross			Accumulated			Foreign			Net
						Amortization			Currency
									Translation
	Completed technology		$	84,680		$	(78,072	)	$	519		$	7,127
	Customer relationships			14,571			(9,831	)		454			5,194
	Patents, trademarks, trade names and other			25,636			(24,951	)		84			769
			$	124,887		$	(112,854	)	$	1,057		$	13,090
	Aggregate amortization expense related to acquired intangibles for the three months ended March 31, 2014 and 2013 were $410 and $434, respectively. Estimated amortization expense for each of the remaining fiscal years is as follows:
	Year		Amount
	2014 (remaining)		$	1,376
	2015			1,769
	2016			1,586
	2017			1,555
	2018			1,546
	Thereafter			4,687

Other_Assets

Other Assets	3 Months Ended
	Mar. 31, 2014
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]	'
Other Assets	'
	9)	Other Assets
		March 31, 2014		December 31, 2013
	Other Assets:
	Deferred tax assets, net	$	10,969	$	9,208
	Long-term income tax receivable		21,315		20,516
	Other		2,099		2,123
	Total other assets	$	34,383	$	31,847

Other_Liabilities

Other Liabilities	3 Months Ended
	Mar. 31, 2014
Other Liabilities Disclosure [Abstract]	'
Other Liabilities	'
	10)	Other Liabilities
		March 31, 2014		December 31, 2013
	Other Current Liabilities:
	Product warranties	$	7,013	$	6,956
	Deferred revenue		6,353		5,556
	Other		23,076		21,730
	Total other current liabilities	$	36,442	$	34,242
	Other Liabilities:
	Long-term income tax payable	$	43,713	$	46,745
	Accrued compensation		10,690		9,646
	Other		6,379		6,682
	Total other liabilities	$	60,782	$	63,073

Debt

Debt	3 Months Ended
	Mar. 31, 2014
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, 2014 of up to an equivalent of $22,527 U.S. dollars. One of the borrowing arrangements has an interest rate based on the Tokyo Interbank Offer Rate at the time of borrowing and the other has an interest rate based on the Japanese Short-term Prime Lending Rate. There were no borrowings outstanding under these arrangements at March 31, 2014 and December 31, 2013.

Product_Warranties

Product Warranties	3 Months Ended
	Mar. 31, 2014
Guarantees [Abstract]	'
Product Warranties	'
	12)	Product Warranties
	The Company provides for the estimated costs to fulfill customer warranty obligations upon the recognition of the related revenue. While the Company engages in extensive product quality programs and processes, including actively monitoring and evaluating the quality of its component suppliers, the Company’s warranty obligation is affected by shipment volume, product failure rates, utilization levels, material usage, and supplier warranties on parts delivered to the Company. Should actual product failure rates, utilization levels, material usage, or supplier warranties on parts differ from the Company’s estimates, revisions to the estimated warranty liability would be required. The product warranty liability is included in other current liabilities in the consolidated balance sheets.
	Product warranty activities were as follows:
		Three Months Ended March 31,
		2014			2013
	Balance at December 31	$	6,956		$	8,266
	Provision for product warranties		704			630
	Direct charges to warranty liability		(656	)		(1,250	)
	Foreign currency translation		9			(113	)
	Balance at March 31	$	7,013		$	7,533

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	13)	Income Taxes
	The Company’s effective tax rate for the three months ended March 31, 2014 and 2013 was 17.8% and (16.0)%, respectively. The primary reason the effective tax rate for the three months ended March 31, 2014, and related income tax expense was lower than the U.S. statutory tax rate was due to the discrete release of income tax reserves related to the effective settlement of a foreign tax examination. 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 also had a significant impact on the effective tax rate. The effective tax rate for the three months ended March 31, 2013, and related tax benefit were lower than the U.S. statutory tax rate due to certain tax incentives realized by the Company, and recognized as discrete events in the quarter. These incentives were reinstated under The American Taxpayer Relief Act of 2012 that was signed into law on January 2, 2013.
	At March 31, 2014, the total amount of gross unrecognized tax benefits, which excludes interest and penalties, was approximately $42,794. At December 31, 2013, the total amount of gross unrecognized tax benefits, which excludes interest and penalties, was approximately $47,684. The net decrease from December 31, 2013 was primarily attributable to a release in reserves for uncertain tax positions due to the effective settlement of a foreign tax examination in the current quarter. As of March 31, 2014, if these benefits were recognized in a future period, the timing of which is not estimable, the net unrecognized tax benefit of $20,536, excluding interest and penalties, would impact the Company’s effective tax rate. The Company accrues interest expense and, if applicable penalties, for any uncertain tax positions. Interest and penalties are classified as a component of income tax expense. At March 31, 2014, and December 31, 2013, the Company had accrued interest on unrecognized tax benefits of approximately $1,863 and $2,159, 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 tax years 2007 through 2009 during the quarter ended June 30, 2012. As a result, the U.S. statute of limitations remains open between tax years 2007 through present. However, carryforward amounts from prior years may still be adjusted upon examination by tax authorities if they are used in a future period. The statute of limitations for the Company’s tax filings in other jurisdictions varies between fiscal years 2007 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. 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 obtains new information or settles or otherwise resolves the underlying matters.

Net_Income_Per_Share

Net Income Per Share	3 Months Ended
	Mar. 31, 2014
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,
		2014		2013
	Numerator:
	Net income	$	31,245	$	5,761
	Denominator:
	Shares used in net income per common share – basic		53,411,000		52,773,000
	Effect of dilutive securities:
	Stock options, restricted stock and employee stock purchase plan		365,000		586,000
	Shares used in net income per common share – diluted		53,776,000		53,359,000
	Net income per common share:
	Basic	$	0.58	$	0.11
	Diluted	$	0.58	$	0.11
	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, 2014, stock options and restricted stock units relating to an aggregate of approximately 1,034,000 shares were outstanding. For the three months ended March 31, 2014 and 2013, the potential dilutive effect of approximately 1,400 and 98,000 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.

Stockholders_Equity

Stockholder's Equity	3 Months Ended
	Mar. 31, 2014
Equity [Abstract]	'
Stockholder's Equity	'
	15)	Stockholder’s Equity
	Stock Repurchase Program
	On July 25, 2011, the Company’s Board of Directors approved a share repurchase program for the repurchase of up to an aggregate of $200,000 of its outstanding common stock from time to time in open market purchases, privately negotiated transactions or through other appropriate means. The timing and quantity of any shares repurchased depends upon a variety of factors, including business conditions, stock market conditions and business development activities, including, but not limited to, merger and acquisition opportunities. These repurchases may be commenced, suspended or discontinued at any time without prior notice.
	During the three months ended March 31, 2014, the Company repurchased approximately 32,000 shares of its common stock for $945, or an average price of $29.81 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, 2014, the Board of Directors authorized a cash dividend of $0.16 per share, which totaled $8,553. 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.
	On May 5, 2014, our Board of Directors declared a quarterly cash dividend of $0.165 per share to be paid on June 13, 2014 to shareholders of record as of June 2, 2014. 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.

Business_Segment_Geographic_Ar

Business Segment, Geographic Area, Product and Significant Customer Information	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
Business Segment, Geographic Area, Product and Significant Customer Information	'
	16)		Business Segment, Geographic Area, Product and Significant Customer Information
	The Company develops, manufactures, sells and services products that measure, control, power and monitor critical parameters of advanced manufacturing processes. The Company’s Chief Operating Decision Maker (“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,
			2014			2013
	Advanced Manufacturing Capital Equipment		$	169,197		$	104,810
	Analytical Solutions Group			14,170			14,396
	Europe Region Sales & Service Operations(1)			14,386			11,048
	Asia Region Sales & Service Operations(1)			66,683			47,143
	Corporate, Eliminations and Other			(58,083	)		(35,752	)
			$	206,353		$	141,645
	-1	The Europe and Asia foreign sales and service operations do not represent total geographical Europe and Asia financial information. These sales and service operations mainly represent the sales from the resale and service of Advanced Manufacturing Capital Equipment and Analytical Solutions Group products in their respective regions. The Advanced Manufacturing Capital Equipment and Analytical Solutions Group segments both have sales in each region. Accordingly, total geographical sales include sales from multiple reportable segments.
	The following is gross profit by reportable segment:
			Three Months Ended March 31,
			2014			2013
	Advanced Manufacturing Capital Equipment		$	67,614		$	34,836
	Analytical Solutions Group			6,547			7,448
	Europe Region Sales & Service Operations(1)			4,240			3,191
	Asia Region Sales & Service Operations(1)			13,024			8,831
	Corporate, Eliminations and Other			(2,053	)		396
			$	89,372		$	54,702
	-1	The Europe and Asia foreign sales and service operations do not represent total geographical Europe and Asia financial information. These sales and service operations mainly represent the sales from the resale and service of Advanced Manufacturing Capital Equipment and Analytical Solutions Group products in their respective regions. The Advanced Manufacturing Capital Equipment and Analytical Solutions Group segments both have sales in each region. Accordingly, total geographical sales include sales from multiple reportable segments.
	The following is capital expenditures by reportable segment for the three months ended March 31, 2014 and 2013:
			Product Groups						Foreign Sales & Service Operations
			Advanced			Analytical			Europe		Asia		Corporate,			Total
			Manufacturing			Solutions							Eliminations
			Capital			Group							and Other
			Equipment
	Three Months Ended March 31, 2014:
	Capital expenditures		$	1,709		$	1,014		$	15	$	122	$	238		$	3,098
			Product Groups						Foreign Sales & Service Operations
			Advanced			Analytical			Europe		Asia		Corporate,			Total
			Manufacturing			Solutions							Eliminations
			Capital			Group							and Other
			Equipment
	Three Months Ended March 31, 2013:
	Capital expenditures		$	2,612		$	111		$	15	$	63	$	555		$	3,356
	The following is depreciation and amortization by reportable segment for the three months ended March 31, 2014 and 2013:
			Product Groups						Foreign Sales & Service Operations
			Advanced			Analytical			Europe		Asia		Corporate,			Total
			Manufacturing			Solutions							Eliminations
			Capital			Group							and Other
			Equipment
	Three Months Ended March 31, 2014:
	Depreciation and amortization		$	2,911		$	214		$	90	$	289	$	646		$	4,150
			Product Groups						Foreign Sales & Service Operations
			Advanced			Analytical			Europe		Asia		Corporate,			Total
			Manufacturing			Solutions							Eliminations
			Capital			Group							and Other
			Equipment
	Three Months Ended March 31, 2013:
	Depreciation and amortization		$	2,941		$	243		$	74	$	294	$	540		$	4,092
	The following is segment assets by reportable segment:
			Product Groups						Foreign Sales & Service Operations
			Advanced			Analytical			Europe		Asia		Corporate,			Total
			Manufacturing			Solutions							Eliminations
			Capital			Group							and Other
			Equipment
	March 31, 2014:
Segment assets:
Accounts receivable(1)		$	17,055		$	4,513		$	7,592	$	43,216	$	47,087		$	119,463
Inventory			121,897			4,342			4,305		26,475		(9,508	)		147,511
Total segment assets		$	138,952		$	8,855		$	11,897	$	69,691	$	37,579		$	266,974
		Product Groups						Foreign Sales & Service Operations
		Advanced			Analytical			Europe		Asia		Corporate,			Total
		Manufacturing			Solutions							Eliminations
		Capital			Group							and Other
		Equipment
December 31, 2013:
Segment assets:
Accounts receivable(1)		$	20,767		$	5,603		$	6,538	$	44,207	$	39,629		$	116,744
Inventory			117,822			4,391			4,254		25,094		(8,834	)		142,727
Total segment assets		$	138,589		$	9,994		$	10,792	$	69,301	$	30,795		$	259,471
-1	A significant portion of segment receivables are processed at the Company’s shared services center at the Corporate location.
A reconciliation of segment assets to consolidated total assets is as follows:
		March 31, 2014			December 31, 2013
Total segment assets		$	266,974		$	259,471
Cash and cash equivalents and investments			647,223			650,022
Other current assets			35,032			30,143
Property, plant and equipment, net			75,517			77,536
Goodwill and intangible assets, net			163,631			163,999
Other assets			34,383			31,847
Consolidated total assets		$	1,222,760		$	1,213,018
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 three 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,
		2014			2013
Instruments, Control and Vacuum Products		$	101,657		$	75,186
Power and Reactive Gas Products			90,602			52,063
Analytical Solutions Group Products			14,094			14,396
		$	206,353		$	141,645
Sales of Instruments, Control and Vacuum Products and Power and Reactive Gas 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,
Net revenues:		2014			2013
United States		$	117,377		$	74,567
Korea			27,591			13,477
Japan			16,928			13,829
Europe			19,555			18,803
Asia (excluding Korea and Japan)			24,902			20,969
		$	206,353		$	141,645
Long-lived assets:(1)		March 31, 2014			December 31, 2013
United States		$	58,176		$	60,700
Europe			6,222			5,484
Asia			12,775			13,475
		$	77,173		$	79,659
-1	Long-lived assets include property, plant and equipment, net and certain other long-term assets, excluding long-term income tax receivable.
Major Customers
The Company had two customers with net revenues greater than 10% of total net revenues in the three months ended March 31, 2014 and 2013 as shown below:
		Three Months Ended March 31,
		2014			2013
Customer A			20.3	%		14.7	%
Customer B			13.1	%		9.6	%

Restructuring

Restructuring	3 Months Ended
	Mar. 31, 2014
Restructuring And Related Activities [Abstract]	'
Restructuring	'
	17)	Restructuring
	The Company recorded restructuring charges of $747 during the three months ended March 31, 2014. The restructuring charges were primarily for severance associated with the reduction in workforce of approximately 65 people throughout the Company.
	The activity related to the Company’s restructuring accrual is shown below:
		Three Months Ended March 31,
		2014
	Balance at December 31	$	—
	Charged to expense		747
	Payments		(217	)
	Balance at March 31	$	530
	During the three months ended March 31, 2014, the Company re-classified certain assets from property, plant and equipment to current assets classified as held for sale, as these assets met the criteria for classification as held for sale. These assets relate to the Company closing one of its facilities in Colorado, as part of restructuring activities announced during the third quarter of 2013.
	The net book value of assets held for sale consists of the following:
		March 31, 2014
	Land	$	474
	Building and building improvements		953
		$	1,427
	The estimated fair value approximates the net book value of the land and building at March 31, 2014.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	18)	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.

Recently_Issued_Accounting_Pro1

Recently Issued Accounting Pronouncements (Policies)	3 Months Ended
	Mar. 31, 2014
Accounting Changes And Error Corrections [Abstract]	'
Recently Issued Accounting Pronouncements	'
	2)	Recently Issued Accounting Pronouncements
	On July 18, 2013, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2013-11, “Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists.” Under the new standard, unrecognized tax benefits will be netted against all available same-jurisdiction loss or other tax carryforwards that would be utilized, rather than only against carryforwards that are created by unrecognized tax benefits. The provisions of this ASU are effective for interim and annual periods beginning on or after December 15, 2013. The adoption of ASU No. 2013-11 did not have a material effect on the Company’s consolidated financial statements.

Investments_Tables

Investments (Tables)	3 Months Ended
	Mar. 31, 2014
Investments Debt And Equity Securities [Abstract]	'
Fair Value of Short-Term 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, 2014		December 31, 2013
	Available-for-sale investments:
	Bankers’ acceptance drafts	$	637	$	491
	Time deposits		3,442		3,439
	Commercial paper and certificates of deposit		127,524		114,984
	Corporate obligations		16,826		18,351
	U.S. agency obligations		158,084		162,450
			306,513		299,715
	Trading investments:
	Mutual funds		—		1,000
		$	306,513	$	300,715
Fair Value of Long-Term Available-for-Sale Investments	'
	The fair value of long-term investments with maturities of more than one year consists of the following:
		March 31, 2014		December 31, 2013
	Available-for-sale investments:
	Time deposits	$	54	$	54
	U.S. agency obligations		53,566		60,351
		$	53,620	$	60,405
Gross Unrealized Gains and (Losses) Aggregated by Investment Category Short-Term and Long-Term Securities	'
	The following tables show the gross unrealized gains and (losses) aggregated by investment category for short-term and long-term available-for-sale investments:
	As of March 31, 2014:	Cost		Gross		Gross			Estimated
				Unrealized		Unrealized			Fair Value
				Gains		(Losses)
	Short-term investments:
	Bankers’ acceptance drafts	$	637	$	—	$	—		$	637
	Time deposits		3,442		—		—			3,442
	Commercial paper and certificates of deposit		127,514		14		(4	)		127,524
	Corporate obligations		16,827		1		(2	)		16,826
	U.S. agency obligations		158,044		48		(8	)		158,084
		$	306,464	$	63	$	(14	)	$	306,513
	Long-term investments:
	Time deposits	$	54	$	—	$	—		$	54
	U.S. agency obligations		53,558		18		(10	)		53,566
		$	53,612	$	18	$	(10	)	$	53,620
	As of December 31, 2013:	Cost		Gross		Gross			Estimated
				Unrealized		Unrealized			Fair Value
				Gains		(Losses)
	Short-term investments:
	Available-for-sale investments:
	Time deposits	$	3,439	$	—	$	—		$	3,439
	Bankers’ acceptance drafts		491		—		—			491
	Commercial paper and certificates of deposit		114,973		15		(4	)		114,984
	Corporate obligations		18,360		—		(9	)		18,351
	U.S. agency obligations		162,430		22		(2	)		162,450
		$	299,693	$	37	$	(15	)	$	299,715
	Long-term investments:
	Time Deposits	$	54	$	—	$	—		$	54
	U.S. agency obligations		60,374		9		(32	)		60,351
		$	60,428	$	9	$	(32	)	$	60,405

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2014
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, 2014 and are summarized as follows:
					Fair Value Measurements at Reporting Date Using
	Description		Total		Quoted Prices in		Significant		Significant
			March 31, 2014		Active Markets		Other		Unobservable
					for Identical		Observable		Inputs
					Assets		Inputs		(Level 3)
					(Level 1)		(Level 2)
	Assets:
	Cash equivalents:
	Money market funds		$	60,742	$	60,742	$	—	$	—
	Bankers acceptance drafts			25		—		25		—
	Commercial paper and certificates of deposit			3,568		—		3,568		—
	Available-for-sale securities:
	Bankers’ acceptance drafts			637		—		637		—
	Time deposits			3,496		—		3,496		—
	Commercial paper and certificates of deposit			127,524		—		127,524		—
	Corporate obligations			16,826		—		16,826		—
	U.S. agency obligations			211,650		—		211,650		—
	Derivatives – currency forward contracts			401		—		401		—
	Total assets		$	424,869	$	60,742	$	364,127	$	—
	Liabilities:
	Derivatives – currency forward contracts		$	408	$	—	$	408	$	—
	Reported as follows:
	Assets:
	Cash and cash equivalents(1)		$	64,335	$	60,742	$	3,593	$	—
	Short-term investments			306,513		—		306,513		—
	Other current assets			401		—		401		—
	Total current assets		$	371,249	$	60,742	$	310,507	$	—
	Long-term investments		$	53,620	$	—	$	53,620	$	—
	Liabilities:
	Other current liabilities		$	408	$	—	$	408	$	—
	-1	The cash and cash equivalent amounts presented in the table above do not include cash of $211,210 and non-negotiable time deposits of $11,545 as of March 31, 2014.
	Assets and liabilities of the Company are measured at fair value on a recurring basis as of December 31, 2013 and are summarized as follows:
					Fair Value Measurements at Reporting Date Using
	Description		Total		Quoted Prices in		Significant Other		Significant
			December 31, 2013		Active Markets for		Observable		Unobservable
					Identical Assets		Inputs		Inputs
					(Level 1)		(Level 2)		(Level 3)
	Assets:
	Cash equivalents:
	Money market funds		$	38,166	$	38,166	$	—	$	—
	Bankers acceptance drafts			32		—		32		—
	Commercial paper and certificates of deposit			10,400		—		10,400		—
	Trading securities:
	Mutual funds			1,000		1,000		—		—
	Available-for-sale securities:
	Time deposits			3,493		—		3,493		—
	Bankers acceptance drafts			491		—		491		—
	Commercial paper and certificates of deposit			114,984		—		114,984		—
	Corporate obligations			18,351		—		18,351		—
	U.S. agency obligations			222,801		—		222,801		—
	Derivatives – currency forward contracts			920		—		920		—
	Total assets		$	410,638	$	39,166	$	371,472	$	—
	Liabilities:
	Derivatives – currency forward contracts		$	656	$	—	$	656	$	—
	Reported as follows:
	Assets:
	Cash and cash equivalents (1)		$	48,598	$	38,166	$	10,432	$	—
	Short-term investments			300,715		1,000		299,715		—
	Other current assets			920		—		920		—
	Total current assets		$	350,233	$	39,166	$	311,067	$	—
	Long-term investments		$	60,405	$	—	$	60,405	$	—
	Liabilities:
Other current liabilities		$	656	$	—	$	656	$	—
-1	The cash and cash equivalent amounts presented in the table above do not include cash of $234,675 and non-negotiable time deposits of $5,629 as of December 31, 2013.

Derivatives_Tables

Derivatives (Tables)	3 Months Ended
	Mar. 31, 2014
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, 2014 and December 31, 2013:
			March 31, 2014
	Currency Hedged (Buy/Sell)		Gross Notional			Fair Value(1)
			Value			Asset/(Liability)
	U.S. Dollar/Japanese Yen		$	14,995		$	345
	U.S. Dollar/South Korean Won			15,037			(258	)
	U.S. Dollar/Euro			4,344			(51	)
	U.S. Dollar/U.K. Pound Sterling			2,517			(43	)
	Total		$	36,893		$	(7	)
	-1	Represents the fair value of the net asset / (liability) amount included in the consolidated balance sheets.
			December 31, 2013
	Currency Hedged (Buy/Sell)		Gross Notional			Fair Value(1)
			Value			Asset/(Liability)
	U.S. Dollar/Japanese Yen		$	7,191		$	920
	U.S. Dollar/South Korean Won			9,254			(521	)
	U.S. Dollar/Euro			2,806			(85	)
	U.S. Dollar/U.K. Pound Sterling			1,767			(50	)
	Total		$	21,018		$	264
	-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, 2014			December 31, 2013
	Derivative assets:
	Forward exchange contracts		$	401		$	920
	Derivative liabilities:
	Forward exchange contracts			(408	)		(656	)
	Total net derivative asset (liability) designated as hedging instruments(1)		$	(7	)	$	264
	-1	The derivative assets of $401 and derivative liabilities of $408 are classified in other current assets and other current liabilities, respectively, in the consolidated balance sheet as of March 31, 2014. The derivative asset of $920 and derivative liability of $656 are classified in other current assets and other current liabilities, respectively, in the consolidated balance sheet as of December 31, 2013. These foreign exchange contracts are subject to a master netting agreement with one financial institution. However, the Company has elected to record these contracts on a gross basis in the balance sheet.
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		2014			2013
	Forward exchange contracts:
	Net (loss) gain recognized in OCI(1)		$	(334	)	$	1,779
	Net (loss) gain reclassified from OCI into income(2)		$	(94	)		203
	-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, 2014 and 2013.
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		2014			2013
	Forward exchange contracts:
	Net gain recognized in income(1)		$	106		$	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.

Inventories_Tables

Inventories (Tables)	3 Months Ended
	Mar. 31, 2014
Inventory Disclosure [Abstract]	'
Summary of Inventories	'
	Inventories consist of the following:
		March 31, 2014		December 31, 2013
	Raw materials	$	76,520	$	75,687
	Work-in-process		23,140		24,304
	Finished goods		47,851		42,736
		$	147,511	$	142,727

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]	'
Goodwill	'
	The changes in the carrying amount of goodwill and accumulated impairment (loss) during the three months ended March 31, 2014 and twelve months ended December 31, 2013 were as follows:
			2014									2013
			Gross			Accumulated			Net			Gross		Accumulated			Net
			Carrying			Impairment						Carrying		Impairment
			Amount			(Loss)						Amount		(Loss)
	Beginning balance at January 1		$	290,323		$	(139,414	)	$	150,909		$	290,147	$	(139,414	)	$	150,733
	Acquired goodwill(1)			381			—			381			—		—			—
	Foreign currency translation			(178	)		—			(178	)		176		—			176
	Ending balance at March 31, 2014 and December 31, 2013		$	290,526		$	(139,414	)	$	151,112		$	290,323	$	(139,414	)	$	150,909
	-1	During the three months ended March 31, 2014, the Company recorded a purchase accounting adjustment for $381 related to the March 12, 2013 purchase of Alter S.r.l.
Intangible Assets	'
	Components of the Company’s intangible assets are comprised of the following:
	As of March 31, 2014:		Gross			Accumulated			Foreign			Net
						Amortization			Currency
									Translation
	Completed technology		$	84,680		$	(78,277	)	$	445		$	6,848
	Customer relationships			14,571			(9,983	)		372			4,960
	Patents, trademarks, trade names and other			25,636			(25,004	)		79			711
			$	124,887		$	(113,264	)	$	896		$	12,519
	As of December 31, 2013:		Gross			Accumulated			Foreign			Net
						Amortization			Currency
									Translation
	Completed technology		$	84,680		$	(78,072	)	$	519		$	7,127
	Customer relationships			14,571			(9,831	)		454			5,194
	Patents, trademarks, trade names and other			25,636			(24,951	)		84			769
			$	124,887		$	(112,854	)	$	1,057		$	13,090
Estimated Amortization Expense	'
	Aggregate amortization expense related to acquired intangibles for the three months ended March 31, 2014 and 2013 were $410 and $434, respectively. Estimated amortization expense for each of the remaining fiscal years is as follows:
	Year		Amount
	2014 (remaining)		$	1,376
	2015			1,769
	2016			1,586
	2017			1,555
	2018			1,546
	Thereafter			4,687

Other_Assets_Tables

Other Assets (Tables)	3 Months Ended
	Mar. 31, 2014
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]	'
Schedule of Other Assets	'
		March 31, 2014		December 31, 2013
	Other Assets:
	Deferred tax assets, net	$	10,969	$	9,208
	Long-term income tax receivable		21,315		20,516
	Other		2,099		2,123
	Total other assets	$	34,383	$	31,847

Other_Liabilities_Tables

Other Liabilities (Tables)	3 Months Ended
	Mar. 31, 2014
Other Liabilities Disclosure [Abstract]	'
Schedule of Other Liabilities	'
		March 31, 2014		December 31, 2013
	Other Current Liabilities:
	Product warranties	$	7,013	$	6,956
	Deferred revenue		6,353		5,556
	Other		23,076		21,730
	Total other current liabilities	$	36,442	$	34,242
	Other Liabilities:
	Long-term income tax payable	$	43,713	$	46,745
	Accrued compensation		10,690		9,646
	Other		6,379		6,682
	Total other liabilities	$	60,782	$	63,073

Product_Warranties_Tables

Product Warranties (Tables)	3 Months Ended
	Mar. 31, 2014
Guarantees [Abstract]	'
Product Warranty Activities	'
	Product warranty activities were as follows:
		Three Months Ended March 31,
		2014			2013
	Balance at December 31	$	6,956		$	8,266
	Provision for product warranties		704			630
	Direct charges to warranty liability		(656	)		(1,250	)
	Foreign currency translation		9			(113	)
	Balance at March 31	$	7,013		$	7,533

Net_Income_Per_Share_Tables

Net Income Per Share (Tables)	3 Months Ended
	Mar. 31, 2014
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,
		2014		2013
	Numerator:
	Net income	$	31,245	$	5,761
	Denominator:
	Shares used in net income per common share – basic		53,411,000		52,773,000
	Effect of dilutive securities:
	Stock options, restricted stock and employee stock purchase plan		365,000		586,000
	Shares used in net income per common share – diluted		53,776,000		53,359,000
	Net income per common share:
	Basic	$	0.58	$	0.11
	Diluted	$	0.58	$	0.11

Business_Segment_Geographic_Ar1

Business Segment, Geographic Area, Product and Significant Customer Information (Tables)	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
Net Revenues by Reportable Segment	'
	The following is net revenues by reportable segment:
			Three Months Ended March 31,
			2014			2013
	Advanced Manufacturing Capital Equipment		$	169,197		$	104,810
	Analytical Solutions Group			14,170			14,396
	Europe Region Sales & Service Operations(1)			14,386			11,048
	Asia Region Sales & Service Operations(1)			66,683			47,143
	Corporate, Eliminations and Other			(58,083	)		(35,752	)
			$	206,353		$	141,645
	-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,
			2014			2013
	Advanced Manufacturing Capital Equipment		$	67,614		$	34,836
	Analytical Solutions Group			6,547			7,448
	Europe Region Sales & Service Operations(1)			4,240			3,191
	Asia Region Sales & Service Operations(1)			13,024			8,831
	Corporate, Eliminations and Other			(2,053	)		396
			$	89,372		$	54,702
	-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 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, 2014 and 2013:
			Product Groups						Foreign Sales & Service Operations
			Advanced			Analytical			Europe		Asia		Corporate,			Total
			Manufacturing			Solutions							Eliminations
			Capital			Group							and Other
			Equipment
	Three Months Ended March 31, 2014:
	Capital expenditures		$	1,709		$	1,014		$	15	$	122	$	238		$	3,098
			Product Groups						Foreign Sales & Service Operations
			Advanced			Analytical			Europe		Asia		Corporate,			Total
			Manufacturing			Solutions							Eliminations
			Capital			Group							and Other
			Equipment
	Three Months Ended March 31, 2013:
	Capital expenditures		$	2,612		$	111		$	15	$	63	$	555		$	3,356
	The following is depreciation and amortization by reportable segment for the three months ended March 31, 2014 and 2013:
			Product Groups						Foreign Sales & Service Operations
			Advanced			Analytical			Europe		Asia		Corporate,			Total
			Manufacturing			Solutions							Eliminations
			Capital			Group							and Other
			Equipment
	Three Months Ended March 31, 2014:
	Depreciation and amortization		$	2,911		$	214		$	90	$	289	$	646		$	4,150
			Product Groups						Foreign Sales & Service Operations
			Advanced			Analytical			Europe		Asia		Corporate,			Total
			Manufacturing			Solutions							Eliminations
			Capital			Group							and Other
			Equipment
	Three Months Ended March 31, 2013:
	Depreciation and amortization		$	2,941		$	243		$	74	$	294	$	540		$	4,092
	The following is segment assets by reportable segment:
			Product Groups						Foreign Sales & Service Operations
			Advanced			Analytical			Europe		Asia		Corporate,			Total
			Manufacturing			Solutions							Eliminations
			Capital			Group							and Other
			Equipment
	March 31, 2014:
	Segment assets:
	Accounts receivable(1)		$	17,055		$	4,513		$	7,592	$	43,216	$	47,087		$	119,463
	Inventory			121,897			4,342			4,305		26,475		(9,508	)		147,511
	Total segment assets		$	138,952		$	8,855		$	11,897	$	69,691	$	37,579		$	266,974
			Product Groups						Foreign Sales & Service Operations
			Advanced			Analytical			Europe		Asia		Corporate,			Total
			Manufacturing			Solutions							Eliminations
			Capital			Group							and Other
			Equipment
	December 31, 2013:
	Segment assets:
	Accounts receivable(1)		$	20,767		$	5,603		$	6,538	$	44,207	$	39,629		$	116,744
	Inventory			117,822			4,391			4,254		25,094		(8,834	)		142,727
	Total segment assets		$	138,589		$	9,994		$	10,792	$	69,301	$	30,795		$	259,471
	-1	A significant portion of segment receivables are processed at the Company’s shared services center at the Corporate location.
Reconciliation of Segment Assets to Consolidated Total Assets	'
	A reconciliation of segment assets to consolidated total assets is as follows:
			March 31, 2014			December 31, 2013
	Total segment assets		$	266,974		$	259,471
	Cash and cash equivalents and investments			647,223			650,022
	Other current assets			35,032			30,143
	Property, plant and equipment, net			75,517			77,536
	Goodwill and intangible assets, net			163,631			163,999
	Other assets			34,383			31,847
	Consolidated total assets		$	1,222,760		$	1,213,018
Worldwide Net Revenue for Each Group of Products	'
	Worldwide net revenue for each group of products is as follows:
			Three Months Ended March 31,
			2014			2013
	Instruments, Control and Vacuum Products		$	101,657		$	75,186
	Power and Reactive Gas Products			90,602			52,063
	Analytical Solutions Group Products			14,094			14,396
			$	206,353		$	141,645
Schedule of Net Revenue and Long-Lived Assets by Geographic Regions	'
	Transfers between geographic areas are at negotiated transfer prices and have been eliminated from consolidated net revenues.
			Three Months Ended March 31,
	Net revenues:		2014			2013
	United States		$	117,377		$	74,567
	Korea			27,591			13,477
	Japan			16,928			13,829
	Europe			19,555			18,803
	Asia (excluding Korea and Japan)			24,902			20,969
			$	206,353		$	141,645
	Long-lived assets:(1)		March 31, 2014			December 31, 2013
	United States		$	58,176		$	60,700
	Europe			6,222			5,484
	Asia			12,775			13,475
			$	77,173		$	79,659
	-1	Long-lived assets include property, plant and equipment, net and certain other long-term assets, excluding long-term income tax receivable.
Customers with Net Revenues Greater than 10% of Total Net Revenues	'
	The Company had two customers with net revenues greater than 10% of total net revenues in the three months ended March 31, 2014 and 2013 as shown below:
			Three Months Ended March 31,
			2014			2013
	Customer A			20.3	%		14.7	%
	Customer B			13.1	%		9.6	%

Restructuring_Tables

Restructuring (Tables)	3 Months Ended
	Mar. 31, 2014
Restructuring And Related Activities [Abstract]	'
Schedule of Company's Restructuring Activity	'
	The activity related to the Company’s restructuring accrual is shown below:
		Three Months Ended March 31,
		2014
	Balance at December 31	$	—
	Charged to expense		747
	Payments		(217	)
	Balance at March 31	$	530
Net Book Value of Assets Held for Sale	'
	The net book value of assets held for sale consists of the following:
		March 31, 2014
	Land	$	474
	Building and building improvements		953
		$	1,427

Investments_Fair_Value_of_Shor

Investments - Fair Value of Short-Term Available-for-Sale and Trading Investments (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Investments [Line Items]	'	'
Fair value of short-term available-for-sale investments	$306,513	$299,715
Fair value of short-term investments	306,513	300,715
Bankers' Acceptance Drafts [Member]	'	'
Schedule of Investments [Line Items]	'	'
Fair value of short-term available-for-sale investments	637	491
Time Deposits [Member]	'	'
Schedule of Investments [Line Items]	'	'
Fair value of short-term available-for-sale investments	3,442	3,439
Commercial Paper and Certificates of Deposit [Member]	'	'
Schedule of Investments [Line Items]	'	'
Fair value of short-term available-for-sale investments	127,524	114,984
Corporate Obligations [Member]	'	'
Schedule of Investments [Line Items]	'	'
Fair value of short-term available-for-sale investments	16,826	18,351
U.S. Agency Obligations [Member]	'	'
Schedule of Investments [Line Items]	'	'
Fair value of short-term available-for-sale investments	158,084	162,450
Mutual Funds [Member]	'	'
Schedule of Investments [Line Items]	'	'
Fair value of short-term investments, mutual funds	'	$1,000

Investments_Fair_Value_of_Long

Investments - Fair Value of Long-Term Available-for-Sale Investments (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Fair value of long-term available-for-sale investments	$53,620	$60,405
Time Deposits [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Fair value of long-term available-for-sale investments	54	54
U.S. Agency Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Fair value of long-term available-for-sale investments	$53,566	$60,351

Investments_Gross_Unrealized_G

Investments - Gross Unrealized Gains and (Losses) Aggregated by Investment Category Short-Term and Long-Term Securities (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Short-term investments, Estimated Fair Value	$306,513	$299,715
Long-term investments, Estimated Fair Value	53,620	60,405
Bankers' Acceptance Drafts [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Short-term investments, Estimated Fair Value	637	491
Time Deposits [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Short-term investments, Estimated Fair Value	3,442	3,439
Long-term investments, Estimated Fair Value	54	54
Commercial Paper and Certificates of Deposit [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Short-term investments, Estimated Fair Value	127,524	114,984
U.S. Agency Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Short-term investments, Estimated Fair Value	158,084	162,450
Long-term investments, Estimated Fair Value	53,566	60,351
Short Term [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Investments, Cost	306,464	299,693
Investments, Gross Unrealized Gains	63	37
Investments, Gross Unrealized (Losses)	-14	-15
Short-term investments, Estimated Fair Value	306,513	299,715
Short Term [Member] | Bankers' Acceptance Drafts [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Investments, Cost	637	491
Investments, Gross Unrealized Gains	'	'
Investments, Gross Unrealized (Losses)	'	'
Short-term investments, Estimated Fair Value	637	491
Short Term [Member] | Time Deposits [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Investments, Cost	3,442	3,439
Investments, Gross Unrealized Gains	'	'
Investments, Gross Unrealized (Losses)	'	'
Short-term investments, Estimated Fair Value	3,442	3,439
Short Term [Member] | Commercial Paper and Certificates of Deposit [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Investments, Cost	127,514	114,973
Investments, Gross Unrealized Gains	14	15
Investments, Gross Unrealized (Losses)	-4	-4
Short-term investments, Estimated Fair Value	127,524	114,984
Short Term [Member] | U.S. Agency Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Investments, Cost	158,044	162,430
Investments, Gross Unrealized Gains	48	22
Investments, Gross Unrealized (Losses)	-8	-2
Short-term investments, Estimated Fair Value	158,084	162,450
Short Term [Member] | Corporate Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Investments, Cost	16,827	18,360
Investments, Gross Unrealized Gains	1	'
Investments, Gross Unrealized (Losses)	-2	-9
Short-term investments, Estimated Fair Value	16,826	18,351
Long Term [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Investments, Cost	53,612	60,428
Investments, Gross Unrealized Gains	18	9
Investments, Gross Unrealized (Losses)	-10	-32
Long-term investments, Estimated Fair Value	53,620	60,405
Long Term [Member] | Time Deposits [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Investments, Cost	54	54
Investments, Gross Unrealized Gains	'	'
Investments, Gross Unrealized (Losses)	'	'
Long-term investments, Estimated Fair Value	54	54
Long Term [Member] | U.S. Agency Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Investments, Cost	53,558	60,374
Investments, Gross Unrealized Gains	18	9
Investments, Gross Unrealized (Losses)	-10	-32
Long-term investments, Estimated Fair Value	$53,566	$60,351

Fair_Value_Measurements_Schedu

Fair Value Measurements - Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Derivatives - currency forward contracts	$401	$920
Derivatives - currency forward contracts	408	656
Long-term investments	53,620	60,405
Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Derivatives - currency forward contracts	401	920
Total assets	424,869	410,638
Derivatives - currency forward contracts	408	656
Cash and cash equivalents	64,335	48,598
Short-term investments	306,513	300,715
Total current assets	371,249	350,233
Long-term investments	53,620	60,405
Other current liabilities	408	656
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]	'	'
Derivatives - currency forward contracts	'	'
Total assets	60,742	39,166
Derivatives - currency forward contracts	'	'
Cash and cash equivalents	60,742	38,166
Short-term investments	'	1,000
Total current assets	60,742	39,166
Long-term investments	'	'
Other current liabilities	'	'
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Derivatives - currency forward contracts	401	920
Total assets	364,127	371,472
Derivatives - currency forward contracts	408	656
Cash and cash equivalents	3,593	10,432
Short-term investments	306,513	299,715
Total current assets	310,507	311,067
Long-term investments	53,620	60,405
Other current liabilities	408	656
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Derivatives - currency forward contracts	'	'
Total assets	'	'
Derivatives - currency forward contracts	'	'
Cash and cash equivalents	'	'
Short-term investments	'	'
Total current assets	'	'
Long-term investments	'	'
Other current liabilities	'	'
Money Market Funds [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents	60,742	38,166
Money Market Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents	60,742	38,166
Money Market Funds [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents	'	'
Money Market Funds [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents	'	'
Bankers' Acceptance Drafts [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents	25	32
Available-for-sale securities	637	491
Bankers' Acceptance Drafts [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents	'	'
Available-for-sale securities	'	'
Bankers' Acceptance Drafts [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents	25	32
Available-for-sale securities	637	491
Bankers' Acceptance Drafts [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents	'	'
Available-for-sale securities	'	'
Commercial Paper and Certificates of Deposit [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents	3,568	10,400
Available-for-sale securities	127,524	114,984
Commercial Paper and Certificates of Deposit [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents	'	'
Available-for-sale securities	'	'
Commercial Paper and Certificates of Deposit [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents	3,568	10,400
Available-for-sale securities	127,524	114,984
Commercial Paper and Certificates of Deposit [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents	'	'
Available-for-sale securities	'	'
Time Deposits [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	3,496	3,493
Time Deposits [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	'	'
Time Deposits [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	3,496	3,493
Time Deposits [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	'	'
Corporate Obligations [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	16,826	18,351
Corporate Obligations [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	'	'
Corporate Obligations [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	16,826	18,351
Corporate Obligations [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	'	'
U.S. Agency Obligations [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	211,650	222,801
U.S. Agency Obligations [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	'	'
U.S. Agency Obligations [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	211,650	222,801
U.S. Agency Obligations [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	'	'
Other Current Assets [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Derivatives - currency forward contracts	401	920
Other Current Assets [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Derivatives - currency forward contracts	'	'
Other Current Assets [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Derivatives - currency forward contracts	401	920
Other Current Assets [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Derivatives - currency forward contracts	'	'
Mutual Funds [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Mutual funds	'	1,000
Mutual Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Mutual funds	'	1,000
Mutual Funds [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Mutual funds	'	'
Mutual Funds [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Mutual funds	'	'

Fair_Value_Measurements_Schedu1

Fair Value Measurements - Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis (Parenthetical) (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Cash [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Not included in cash and cash equivalent amount	$211,210	$234,675
Non Negotiable Time Deposits [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Not included in cash and cash equivalent amount	$11,545	$5,629

Derivatives_Additional_Informa

Derivatives - Additional Information (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
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	$36,893	$21,018
Accumulated earnings period	'12 months	'

Derivatives_Summary_of_Primary

Derivatives - Summary of Primary Net Hedging Positions and Corresponding Fair Values (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Derivative [Line Items]	'	'
Currency Hedged (Buy/Sell), Gross Notional Value, Net	$36,893	$21,018
Currency Hedged (Buy/Sell), Fair Value, Asset/(Liability), Net	-7	264
U.S. Dollar/Japanese Yen [Member]	'	'
Derivative [Line Items]	'	'
Currency Hedged (Buy/Sell), Gross Notional Value, Net	14,995	7,191
Currency Hedged (Buy/Sell), Fair Value, Asset/(Liability), Net	345	920
U.S. Dollar/South Korean Won [Member]	'	'
Derivative [Line Items]	'	'
Currency Hedged (Buy/Sell), Gross Notional Value, Net	15,037	9,254
Currency Hedged (Buy/Sell), Fair Value, Asset/(Liability), Net	-258	-521
U.S. Dollar/Euro [Member]	'	'
Derivative [Line Items]	'	'
Currency Hedged (Buy/Sell), Gross Notional Value, Net	4,344	2,806
Currency Hedged (Buy/Sell), Fair Value, Asset/(Liability), Net	-51	-85
U.S. Dollar/U.K. Pound Sterling [Member]	'	'
Derivative [Line Items]	'	'
Currency Hedged (Buy/Sell), Gross Notional Value, Net	2,517	1,767
Currency Hedged (Buy/Sell), Fair Value, Asset/(Liability), Net	($43)	($50)

Derivatives_Summary_of_Fair_Va

Derivatives - Summary of Fair Value Amounts of Company's Derivative Instruments (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Derivatives, Fair Value [Line Items]	'	'
Forward exchange contracts, Assets	$401	$920
Forward exchange contracts, Liabilities	-408	-656
Total net derivative asset (liability) designated as hedging instruments	-7	264
Derivatives Designated as Hedging Instruments [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Forward exchange contracts, Assets	401	920
Forward exchange contracts, Liabilities	-408	-656
Total net derivative asset (liability) designated as hedging instruments	($7)	$264

Derivatives_Summary_of_Fair_Va1

Derivatives - Summary of Fair Value Amounts of Company's Derivative Instruments (Parenthetical) (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'	'
Derivative assets classified in other current assets	$401	$920
Derivative liabilities classified in other current liabilities	$408	$656

Derivatives_Summary_of_Gains_L

Derivatives - Summary of Gains (Losses) on Derivatives Designated as Hedging Instruments (Detail) (Forward Exchange Contracts [Member], Cash Flow Hedging [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Forward Exchange Contracts [Member] | Cash Flow Hedging [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Net (loss) gain recognized in OCI	($334)	$1,779
Net (loss) gain reclassified from OCI into income	($94)	$203

Derivatives_Summary_of_Gains_o

Derivatives - Summary of Gains on Derivatives Not Designated as Hedging Instruments (Detail) (Derivatives Not Designated as Hedging Instruments [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Derivatives Not Designated as Hedging Instruments [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Net gain recognized in income	$106	$491

Inventories_Summary_of_Invento

Inventories - Summary of Inventories (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Raw materials	$76,520	$75,687
Work-in-process	23,140	24,304
Finished goods	47,851	42,736
Inventories	$147,511	$142,727

Acquisitions_Additional_Inform

Acquisitions - Additional Information (Detail) (Granville-Phillips [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Mar. 18, 2014
Granville-Phillips [Member]	'	'
Business Acquisition [Line Items]	'	'
Pending acquisition purchase price	'	$87,000
Market sales of an acquiree	$30,000	'

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended
In Thousands, unless otherwise specified	Oct. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'	'	'
Impairment of goodwill	$0	'	'
Aggregate amortization expense related to acquired intangibles	'	$410	$434

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets - Goodwill (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'	'
Beginning balance, Goodwill Gross Carrying Amount	$290,323	$290,147
Acquired goodwill, Gross Carrying Amount	381	'
Foreign currency translation, Gross Carrying Amount	-178	176
Ending balance, Goodwill Gross Carrying Amount	290,526	290,323
Beginning balance, Accumulated Impairment (Loss)	-139,414	-139,414
Acquired goodwill, Accumulated Impairment (Loss)	'	'
Foreign currency translation, Accumulated Impairment (Loss)	'	'
Ending balance, Accumulated Impairment (Loss)	-139,414	-139,414
Beginning balance, Goodwill Net	150,909	150,733
Acquired goodwill, Net	381	'
Foreign currency translation, Net	-178	176
Ending balance, Goodwill Net	$151,112	$150,909

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets - Goodwill (Parenthetical) (Detail) (Alter S.r.l [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014
Alter S.r.l [Member]	'
Goodwill [Line Items]	'
Acquisition purchase price	$381

Goodwill_and_Intangible_Assets5

Goodwill and Intangible Assets - Intangible Assets (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]	'	'
Intangible assets, Gross	$124,887	$124,887
Accumulated Amortization	-113,264	-112,854
Foreign Currency Translation	896	1,057
Intangible assets, net	12,519	13,090
Completed Technology [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Intangible assets, Gross	84,680	84,680
Accumulated Amortization	-78,277	-78,072
Foreign Currency Translation	445	519
Intangible assets, net	6,848	7,127
Customer Relationships [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Intangible assets, Gross	14,571	14,571
Accumulated Amortization	-9,983	-9,831
Foreign Currency Translation	372	454
Intangible assets, net	4,960	5,194
Patents, Trademarks, Trade Names and Other [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Intangible assets, Gross	25,636	25,636
Accumulated Amortization	-25,004	-24,951
Foreign Currency Translation	79	84
Intangible assets, net	$711	$769

Goodwill_and_Intangible_Assets6

Goodwill and Intangible Assets - Estimated Amortization Expense (Detail) (USD $)	Mar. 31, 2014
In Thousands, unless otherwise specified
Goodwill And Intangible Assets Disclosure [Abstract]	'
2014 (remaining)	$1,376
2015	1,769
2016	1,586
2017	1,555
2018	1,546
Thereafter	$4,687

Other_Assets_Schedule_of_Other

Other Assets - Schedule of Other Assets (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Other Assets:	'	'
Deferred tax assets, net	$10,969	$9,208
Long-term income tax receivable	21,315	20,516
Other	2,099	2,123
Total other assets	$34,383	$31,847

Other_Liabilities_Schedule_of_

Other Liabilities - Schedule of Other Liabilities (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Other Current Liabilities:	'	'
Product warranties	$7,013	$6,956
Deferred revenue	6,353	5,556
Other	23,076	21,730
Total other current liabilities	36,442	34,242
Other Liabilities:	'	'
Long-term income tax payable	43,713	46,745
Accrued compensation	10,690	9,646
Other	6,379	6,682
Total other liabilities	$60,782	$63,073

Debt_Additional_Information_De

Debt - Additional Information (Detail) (Japan Line of Credit [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
	Institution
Japan Line of Credit [Member]	'	'
Debt Instrument [Line Items]	'	'
Number of financial institutions for available lines of credit and borrowing arrangements	2	'
Aggregate borrowings expire and renewed	'3 month intervals	'
Total available line of credit	$22,527	'
Total borrowings outstanding	$0	$0

Product_Warranties_Product_War

Product Warranties - Product Warranty Activities (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Guarantees [Abstract]	'	'
Beginning balance	$6,956	$8,266
Provision for product warranties	704	630
Direct charges to warranty liability	-656	-1,250
Foreign currency translation	9	-113
Ending balance	$7,013	$7,533

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'	'	'
Effective tax rate	17.80%	-16.00%	'
Gross unrecognized tax benefits excluding interest and penalties	$42,794	'	$47,684
Net unrecognized tax benefit excluding interest and penalties that would impact effective tax rate	20,536	'	'
Accrued interest on unrecognized tax benefits	$1,863	'	$2,159

Net_Income_Per_Share_Computati

Net Income Per Share - Computation of Basic and Diluted Net Income Per Share (Detail) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Numerator:	'	'
Net income	$31,245	$5,761
Denominator:	'	'
Shares used in net income per common share - basic	53,411,000	52,773,000
Effect of dilutive securities:	'	'
Stock options, restricted stock and employee stock purchase plan	365,000	586,000
Shares used in net income per common share - diluted	53,776,000	53,359,000
Net income per common share:	'	'
Basic	$0.58	$0.11
Diluted	$0.58	$0.11

Net_Income_Per_Share_Additiona

Net Income Per Share - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share [Abstract]	'	'
Stock options and restricted stock units outstanding	1,034,000	'
Number of shares excluded from computation of diluted earnings per share	1,400	98,000

Stockholders_Equity_Additional

Stockholder's Equity - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Jul. 25, 2011	Mar. 31, 2014	Mar. 31, 2013
Equity [Abstract]	'	'	'
Common stock, value of shares authorized to repurchase	$200,000	'	'
Stock repurchase, shares	'	32,000	'
Value of shares repurchased	'	945	'
Average price of repurchased shares	'	$29.81	'
Cash dividend paid	'	$0.16	$0.16
Dividend payment to common shareholders	'	$8,553	$8,448
Dividend declared date	'	5-May-14	'
Cash dividend to be paid	'	$0.17	'
Dividend to be paid date	'	13-Jun-14	'
Dividend declared, shareholders of record date	'	2-Jun-14	'

Business_Segment_Geographic_Ar2

Business Segment, Geographic Area, Product and Significant Customer Information - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2014
	Customer
	Segment
	Product
Segment Reporting [Abstract]	'
Number of reportable segments	4
Number of operating segments	8
Number of product groups	3
Number of customers with net revenues greater than 10% of total net revenues	2
Entity wide net revenue major customer percentage minimum	10.00%

Business_Segment_Geographic_Ar3

Business Segment, Geographic Area, Product and Significant Customer Information - Net Revenues by Reportable Segment (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]	'	'
Total net revenues	$206,353	$141,645
Advanced Manufacturing Capital Equipment [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Total net revenues	169,197	104,810
Analytical Solutions Group [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Total net revenues	14,170	14,396
Europe Region Sales & Service Operations [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Total net revenues	14,386	11,048
Asia Region Sales & Service Operations [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Total net revenues	66,683	47,143
Corporate, Eliminations and Other [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Total net revenues	($58,083)	($35,752)

Business_Segment_Geographic_Ar4

Business Segment, Geographic Area, Product and Significant Customer Information - Schedule of Gross Profit (Loss) by Reportable Segment (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]	'	'
Gross profit	$89,372	$54,702
Advanced Manufacturing Capital Equipment [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Gross profit	67,614	34,836
Analytical Solutions Group [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Gross profit	6,547	7,448
Europe Region Sales & Service Operations [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Gross profit	4,240	3,191
Asia Region Sales & Service Operations [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Gross profit	13,024	8,831
Corporate, Eliminations and Other [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Gross profit	($2,053)	$396

Business_Segment_Geographic_Ar5

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 $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]	'	'	'
Capital expenditures	$3,098	$3,356	'
Depreciation and amortization	4,150	4,092	'
Accounts receivable	119,463	'	116,744
Inventory	147,511	'	142,727
Total segment assets	266,974	'	259,471
Advanced Manufacturing Capital Equipment [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Capital expenditures	1,709	2,612	'
Depreciation and amortization	2,911	2,941	'
Accounts receivable	17,055	'	20,767
Inventory	121,897	'	117,822
Total segment assets	138,952	'	138,589
Analytical Solutions Group [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Capital expenditures	1,014	111	'
Depreciation and amortization	214	243	'
Accounts receivable	4,513	'	5,603
Inventory	4,342	'	4,391
Total segment assets	8,855	'	9,994
Europe Region Sales & Service Operations [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Capital expenditures	15	15	'
Depreciation and amortization	90	74	'
Accounts receivable	7,592	'	6,538
Inventory	4,305	'	4,254
Total segment assets	11,897	'	10,792
Asia Region Sales & Service Operations [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Capital expenditures	122	63	'
Depreciation and amortization	289	294	'
Accounts receivable	43,216	'	44,207
Inventory	26,475	'	25,094
Total segment assets	69,691	'	69,301
Corporate, Eliminations and Other [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Capital expenditures	238	555	'
Depreciation and amortization	646	540	'
Accounts receivable	47,087	'	39,629
Inventory	-9,508	'	-8,834
Total segment assets	$37,579	'	$30,795

Business_Segment_Geographic_Ar6

Business Segment, Geographic Area, Product and Significant Customer Information - Reconciliation of Segment Assets to Consolidated Total Assets (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Segment Reporting Information [Line Items]	'	'
Total assets	$1,222,760	$1,213,018
Other current assets	17,552	16,715
Property, plant and equipment, net	75,517	77,536
Other assets	34,383	31,847
Reconciliation of Segment Assets to Consolidated Assets [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Total assets	266,974	259,471
Cash and cash equivalents and investments	647,223	650,022
Other current assets	35,032	30,143
Property, plant and equipment, net	75,517	77,536
Goodwill and intangible assets, net	163,631	163,999
Other assets	$34,383	$31,847

Business_Segment_Geographic_Ar7

Business Segment, Geographic Area, Product and Significant Customer Information - Worldwide Net Revenue for Each Group of Products (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Revenue from External Customer [Line Items]	'	'
Net sales from product groups	$206,353	$141,645
Instruments Control and Vacuum Products [Member]	'	'
Revenue from External Customer [Line Items]	'	'
Net sales from product groups	101,657	75,186
Power and Reactive Gas Products [Member]	'	'
Revenue from External Customer [Line Items]	'	'
Net sales from product groups	90,602	52,063
Analytical Solutions Group Products [Member]	'	'
Revenue from External Customer [Line Items]	'	'
Net sales from product groups	$14,094	$14,396

Business_Segment_Geographic_Ar8

Business Segment, Geographic Area, Product and Significant Customer Information - Schedule of Net Revenue and Long-Lived Assets by Geographic Regions (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Net revenues	$206,353	$141,645	'
Long-lived assets	77,173	'	79,659
United States [Member]	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Net revenues	117,377	74,567	'
Long-lived assets	58,176	'	60,700
Korea [Member]	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Net revenues	27,591	13,477	'
Japan [Member]	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Net revenues	16,928	13,829	'
Europe [Member]	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Net revenues	19,555	18,803	'
Long-lived assets	6,222	'	5,484
Asia (excluding Korea and Japan in 2013 and Japan in 2014) [Member]	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Net revenues	24,902	20,969	'
Long-lived assets	$12,775	'	$13,475

Business_Segment_Geographic_Ar9

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, 2014	Mar. 31, 2013
Customer A [Member]	'	'
Revenue, Major Customer [Line Items]	'	'
Percentage of total net revenues	20.30%	14.70%
Customer B [Member]	'	'
Revenue, Major Customer [Line Items]	'	'
Percentage of total net revenues	13.10%	9.60%

Restructuring_Additional_Infor

Restructuring - Additional Information (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
	People
	Facility
Reorganizations [Abstract]	'	'
Restructuring charges	$747	$40
Approximate number of workforce reduction from the company's headcount	65	'
Number of facilities closing	1	'

Restructuring_Schedule_of_Comp

Restructuring - Schedule of Company's Restructuring Activity (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Restructuring And Related Activities [Abstract]	'	'
Balance at December 31	'	'
Charged to expense	747	40
Payments	-217	'
Balance at March 31	$530	'

Restructuring_Net_Book_Value_o

Restructuring - Net Book Value of Assets Held for Sale (Detail) (USD $)	Mar. 31, 2014
In Thousands, unless otherwise specified
Long Lived Assets Held-for-sale [Line Items]	'
Net book value of assets held for sale	$1,427
Land [Member]	'
Long Lived Assets Held-for-sale [Line Items]	'
Net book value of assets held for sale	474
Building and Building Improvements [Member]	'
Long Lived Assets Held-for-sale [Line Items]	'
Net book value of assets held for sale	$953