MKS Instruments (MKSI) 10-Q 3 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 27, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Trading Symbol	MKSI
Entity Registrant Name	MKS INSTRUMENTS INC
Entity Central Index Key	1,049,502
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		54,294,566

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 305,977	$ 228,623
Restricted cash	117	5,287
Short-term investments	228,631	189,463
Trade accounts receivable, net	280,302	248,757
Inventories, net	319,460	275,869
Other current assets	60,716	50,770
Total current assets	1,195,203	998,769
Property, plant and equipment, net	166,928	174,559
Goodwill	589,099	588,585
Intangible assets, net	376,334	408,004
Long-term investments	10,593	9,858
Other assets	32,188	32,467
Total assets	2,370,345	2,212,242
Current liabilities:
Short-term borrowings and current portion of long-term debt	4,020	10,993
Accounts payable	77,842	69,337
Accrued compensation	75,725	67,728
Income taxes payable	38,609	22,794
Deferred revenue	17,812	14,463
Other current liabilities	68,604	51,985
Total current liabilities	282,612	237,300
Long-term debt	435,731	601,229
Non-current deferred taxes	71,110	66,446
Non-current accrued compensation	50,080	44,714
Other liabilities	23,107	20,761
Total liabilities	862,640	970,450
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; 54,291,361 and 53,672,861 shares issued and outstanding at September 30, 2017 and December 31, 2016, respectively	113	113
Additional paid-in capital	782,597	777,482
Retained earnings	727,835	494,744
Accumulated other comprehensive loss	(2,840)	(30,547)
Total stockholders' equity	1,507,705	1,241,792
Total liabilities and stockholders' equity	$ 2,370,345	$ 2,212,242

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Sep. 30, 2017	Dec. 31, 2016
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	54,291,361	53,672,861
Common stock, shares outstanding	54,291,361	53,672,861

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net revenues:
Products		$ 434,710	$ 335,156	$ 1,259,582	$ 774,248
Services		51,557	45,504	144,595	115,954
Total net revenues		486,267	380,660	1,404,177	890,202
Cost of revenues:
Cost of products		225,174	183,789	659,538	433,134
Cost of services		33,098	28,486	91,514	74,857
Total cost of revenues (exclusive of amortization shown separately below)		258,272	212,275	751,052	507,991
Gross profit		227,995	168,385	653,125	382,211
Research and development		32,548	32,268	99,510	77,709
Selling, general and administrative		71,839	68,016	218,038	161,545
Acquisition and integration costs		2,466	2,641	4,698	25,190
Restructuring		10		2,596	24
Asset impairment				6,719
Amortization of intangible assets		10,977	12,452	34,946	22,990
Income from operations		110,155	53,008	286,618	94,753
Interest income		873	404	1,896	1,858
Interest expense		7,172	12,007	23,001	20,526
Gain on sale of business				74,856
Other (expense) income, net		(2,485)	843	(3,741)	2,336
Income before income taxes		101,371	42,248	336,628	78,421
Provision for income taxes		25,377	9,699	75,134	19,099
Net income		75,994	32,549	261,494	59,322
Other comprehensive income:
Changes in value of financial instruments designated as cash flow hedges, net of tax benefit	[1]	(908)	(229)	(3,578)	(2,104)
Foreign currency translation adjustments, net of tax of $0		8,088	5,698	30,352	(536)
Unrecognized pension loss, net of tax expense	[2]	(565)		(204)
Unrealized gain (loss) on investments, net of tax expense (benefit)	[3]	1,301	(31)	1,137	424
Total comprehensive income		$ 83,910	$ 37,987	$ 289,201	$ 57,106
Net income per share:
Basic		$ 1.40	$ 0.61	$ 4.84	$ 1.11
Diluted		1.38	0.60	4.75	1.10
Cash dividends per common share		$ 0.175	$ 0.170	$ 0.525	$ 0.510
Weighted average common shares outstanding:
Basic		54,282	53,574	54,076	53,423
Diluted		55,101	54,315	55,020	53,895
[1]	Tax expense (benefit) was $688 and $(117) for the three months ended September 30, 2017 and 2016, respectively. Tax benefit was $884 and $1,357 for the nine months ended September 30, 2017 and 2016, respectively.
[2]	Tax benefit was $312 and $315 for the three and nine months ended September 30, 2017, respectively.
[3]	Tax benefit was $467 and $15 for the three months ended September 30, 2017 and 2016, respectively. Tax (benefit) expense was $(737) and $274 for the nine months ended September 30, 2017 and 2016, respectively.

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Tax expense (benefit) on changes in value of financial instruments designated as cash flow hedges	$ 688	$ (117)	$ 884	$ 1,357
Tax on foreign currency translation adjustments	0	0	0	0
Tax benefit on unrecognized net pension loss	312		315
Tax (benefit) expense on unrealized gain (loss) on investments	$ 467	$ 15	$ (737)	$ 274

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows provided by operating activities:
Net income	$ 261,494	$ 59,322
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	62,550	43,757
Amortization of debt issuance costs, original issue discount and soft call premium	6,385	6,453
Amortization of inventory step-up adjustment to fair value		15,090
Asset impairment	6,719
Gain on sale of business	(74,856)
Stock-based compensation	19,834	19,826
Provision for excess and obsolete inventory	15,349	11,045
Provision for bad debt	650	167
Deferred income taxes	6,641	(9,567)
Excess tax benefits from stock-based compensation		(678)
Other	832	125
Changes in operating assets and liabilities:
Trade accounts receivable	(26,489)	(44,508)
Inventories	(51,251)	(5,077)
Income taxes	15,646	20,418
Other current and non-current assets	(9,714)	(12,134)
Accrued compensation	11,058	4,460
Other current and non-current liabilities	22,517	4,568
Accounts payable	7,071	14,110
Net cash provided by operating activities	274,436	127,377
Cash flows provided by investing activities:
Acquisition of businesses, net of cash acquired		(939,591)
Net proceeds from sale of business	72,509
Proceeds from sale of property, plant and equipment		40
Purchases of investments	(199,012)	(116,075)
Maturities of investments	116,779	148,606
Sales of investments	43,571	337,592
Purchases of property, plant and equipment	(17,857)	(11,959)
Net cash provided by (used in) investing activities	15,990	(581,387)
Cash flows used in financing activities:
Restricted cash	5,012	(6,176)
Proceeds from short-term borrowings	12,968	15,434
Proceeds from long-term borrowings	190	743,746
Payments on short-term borrowings	(13,277)	(8,289)
Payments on long-term borrowings	(178,141)	(111,825)
Repurchase of common stock		(1,545)
Net payments related to employee stock awards	(14,719)	(3,108)
Dividend payments to common stockholders	(28,403)	(27,249)
Excess tax benefits from stock-based compensation		678
Net cash (used in) provided by financing activities	(216,370)	601,666
Effect of exchange rate changes on cash and cash equivalents	3,298	(8,356)
Increase in cash and cash equivalents	77,354	139,300
Cash and cash equivalents at beginning of period	228,623	227,574
Cash and cash equivalents at end of period	$ 305,977	$ 366,874

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	1) Basis of Presentation The terms “MKS” and the “Company” refer to MKS Instruments, Inc. and its subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. The interim financial data as of September 30, 2017, and for the three and nine months ended September 30, 2017 and 2016 are unaudited; however, in the opinion of MKS, the interim data includes all adjustments, consisting of normal recurring adjustments, necessary for a fair statement of the results for the interim periods. The condensed consolidated balance sheet presented as of December 31, 2016 has been derived from the consolidated audited financial statements as of that date. The unaudited condensed consolidated financial statements presented herein have been prepared in accordance with the instructions to Form 10-Q 10-K The preparation of these unaudited condensed 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 unaudited condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. On an on-going

Recently Issued Accounting Pron

Recently Issued Accounting Pronouncements	9 Months Ended
	Sep. 30, 2017
Accounting Changes and Error Corrections [Abstract]
Recently Issued Accounting Pronouncements	2) Recently Issued Accounting Pronouncements In August 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-12, In May 2017, the FASB issued ASU 2017-09, In March 2017, the FASB issued ASU 2017-07, In January 2017, the FASB issued ASU 2017-04, In January 2017, the FASB issued ASU 2017-01, In November 2016, the FASB issued ASU 2016-18, 2016-15. beginning-of-period end-of-period 2016-15. In October 2016, the FASB issued ASU 2016-16, In August 2016, the FASB issued ASU 2016-15, In February 2016, the FASB issued ASU 2016-02, In January 2016, the FASB issued ASU 2016-01, “Financial 825-10): In May 2014, the FASB issued ASU 2014-09, 2014-09 2014-09 In March, April, May and December 2016 and September 2017, the FASB issued additional updates to the new revenue standard relating to reporting revenue on a gross versus net basis, identifying performance obligations and licensing arrangements, narrow-scope improvements and practical expedients, and technical corrections and improvements, respectively. The Company has established a cross functional project steering committee and implementation team to identify potential differences that would result from applying the requirements of the new standard to the Company’s revenue contracts and related expense line items. The Company has reviewed its plan for the implementation and will continue to report the status against that plan to the Company’s Audit Committee. To date, the Company has made significant progress in evaluating the potential changes that the adoption of the new standard may have on its future financial reporting and disclosures. The Company has identified the various revenue streams, including product revenues, service revenues, installation and training, that could be impacted by Topic 606 and has reviewed individual customer contracts related to these revenue streams. The new revenue standard will primarily impact the Company’s recording of repair revenue and customized products, which will be recognized over time under Topic 606 as opposed to a point in time under the current standard. The Company is in the process of finalizing and documenting its assumptions used in quantifying the impact adoption of the new revenue standard will have on the Company, which could vary quarter to quarter. Based on the Company’s preliminary analysis, it does not expect the adoption of the new guidance to have a material impact on the timing or amount of its revenue recognition. In addition, the Company does not expect any major changes to be made to its existing accounting systems or internal controls. The Company will continue to assess the effect that the new revenue guidance will have on its consolidated financial statements, disclosures and related controls, and will disclose any material effects, if any, when known.

Investments

Investments	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Investments	3) Investments The fair value of investments classified as short-term consists of the following: September 30, December 31, Available-for-sale Time deposits and certificates of deposit $ 21,503 $ 23,818 Bankers’ acceptance drafts 3,452 1,439 Asset-backed securities 39,702 36,809 Commercial paper 21,215 24,381 Corporate obligations 80,099 46,707 Municipal bonds 45 591 Promissory note 1,075 675 U.S. treasury obligations 25,777 25,414 U.S. agency obligations 35,763 29,629 $ 228,631 $ 189,463 Investments classified as long-term consists of the following: September 30, December 31, Available-for-sale Group insurance contracts $ 6,193 $ 5,558 Cost method investments: Minority interest in a private company (1) 4,400 4,300 $ 10,593 $ 9,858 (1) In April 2016, the Company invested $9,300 for a minority interest in a private company. For the year ended December 31, 2016, the Company recognized $5,000 of impairment charges related to this cost method investment. In July 2017, the Company invested an additional $100 in this private company. The following tables show the gross unrealized gains and (losses) aggregated by investment category for available-for-sale Cost Gross Gross Estimated As of September 30, 2017: Short-term investments: Available-for-sale Time deposits and certificates of deposit $ 21,501 $ 2 $ — $ 21,503 Bankers’ acceptance drafts 3,452 — — 3,452 Asset-backed securities 39,709 17 (24 ) 39,702 Commercial paper 21,278 — (63 ) 21,215 Corporate obligations 80,020 87 (8 ) 80,099 Municipal bonds 45 — — 45 Promissory note 1,075 — — 1,075 U.S. treasury obligations 25,756 21 — 25,777 U.S. agency obligations 35,756 10 (3 ) 35,763 $ 228,592 $ 137 $ (98 ) $ 228,631 Cost Gross Gross Estimated As of September 30, 2017: Long-term investments: Available-for-sale Group insurance contracts $ 6,193 $ — $ — $ 6,193 Cost Gross Gross Estimated As of December 31, 2016: Short-term investments: Available-for-sale Time deposits and certificates of deposit $ 23,818 $ — $ — $ 23,818 Bankers acceptance drafts 1,439 — — 1,439 Asset-backed securities 36,847 6 (44 ) 36,809 Commercial paper 24,423 — (42 ) 24,381 Corporate obligations 46,700 21 (14 ) 46,707 Municipal bonds 591 — — 591 Promissory note 675 — — 675 U.S. treasury obligations 25,414 — — 25,414 U.S. agency obligations 29,631 8 (10 ) 29,629 $ 189,538 $ 35 $ (110 ) $ 189,463 Cost Gross Gross Estimated As of December 31, 2016: Long-term investments: Available-for-sale Group insurance contracts $ 6,276 $ — $ (718 ) $ 5,558 The tables above, which show the gross unrealized gains and (losses) aggregated by investment category for available-for-sale The Company reviews and evaluates its investments for any indication of possible impairment. Based on this review, the Company has determined that the unrealized losses related to these investments at September 30, 2017 and December 31, 2017, were temporary. Interest income is accrued as earned. Dividend income is recognized as income on the date the stock trades “ex-dividend.”

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2017
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 September 30, 2017 and are summarized as follows: Fair Value Measurements at Reporting Date Using Description September 30, Quoted Prices in Significant Significant Assets: Cash equivalents: Money market funds $ 3,872 $ 3,872 $ — $ — Time deposits and certificates of deposit — — — — Bankers’ acceptance drafts 338 — 338 — Commercial paper 21,792 — 21,792 — Corporate obligations 2,269 — 2,269 — U.S. agency obligations 6,595 — 6,595 — Restricted cash – money market funds 117 117 — — Available-for-sale Time deposits and certificates of deposit 21,503 — 21,503 — Bankers’ acceptance drafts 3,452 — 3,452 — Asset-backed securities 39,702 — 39,702 — Commercial paper 21,215 — 21,215 — Corporate obligations 80,099 — 80,099 — Municipal bonds 45 — 45 — Promissory note 1,075 — 1,075 — U.S. treasury obligations 25,777 — 25,777 — U.S. agency obligations 35,763 — 35,763 — Group insurance contracts 6,193 — 6,193 — Derivatives – currency forward contracts 425 — 425 — Funds in investments and other assets: Israeli pension assets 14,166 — 14,166 — Derivatives – interest rate hedge – non-current 4,362 — 4,362 — Restricted cash – non-current 820 820 — — Total assets $ 289,580 $ 4,809 $ 284,771 $ — Liabilities: Derivatives – currency forward contracts $ 2,390 $ — $ 2,390 $ — Reported as follows: Assets: Cash and cash equivalents (1) $ 34,866 $ 3,872 $ 30,994 $ — Restricted cash 117 117 — — Short-term investments 228,631 — 228,631 — Other current assets 425 — 425 — Total current assets $ 264,039 $ 3,989 $ 260,050 $ — Long-term investments (2) $ 6,193 $ — $ 6,193 $ — Other long-term assets 18,528 — 18,528 — Restricted cash – non-current 820 820 — — Total long-term assets $ 25,541 $ 820 $ 24,721 $ — Liabilities: Other current liabilities $ 2,390 $ — $ 2,390 $ — (1) The cash and cash equivalent amounts presented in the table above do not include cash of $266,899 and non-negotiable (2) The long-term investments presented in the table above do not include the Company’s minority interest investment in a private company, which is accounted for under the cost method. Assets and liabilities of the Company are measured at fair value on a recurring basis as of December 31, 2016 and are summarized as follows: Fair Value Measurements at Reporting Date Using Description December 31, Quoted Prices in Significant Significant Assets: Cash equivalents: Money market funds $ 10,155 $ 10,155 $ — $ — Time deposits and certificates of deposit 4,900 — 4,900 — Bankers acceptance drafts 448 — 448 — Commercial paper 11,828 — 11,828 — Corporate obligations 2,025 — 2,025 — U.S. agency obligations 3,899 — 3,899 — Restricted cash – money market funds 5,287 5,287 — — Available-for-sale Time deposits and certificates of deposit ``` 23,818 — 23,818 — Bankers acceptance drafts 1,439 — 1,439 — Asset-backed securities 36,809 — 36,809 — Commercial paper 24,381 — 24,381 — Corporate obligations 46,707 — 46,707 — Municipal bonds 591 — 591 — Promissory note 675 — 675 — U.S. treasury obligations 25,414 — 25,414 — U.S. agency obligations 29,629 — 29,629 — Group insurance contracts 5,558 — 5,558 — Derivatives – currency forward contracts 2,985 — 2,985 — Funds in investments and other assets: Israeli pension assets 13,910 — 13,910 — Derivatives – interest rate hedge – non-current 4,900 — 4,900 — Restricted cash – non-current 573 573 — — Total assets $ 255,931 $ 16,015 $ 239,916 $ — Liabilities: Derivatives – currency forward contracts $ 543 $ — $ 543 $ — Total liabilities $ 543 $ — $ 543 $ — Assets: Cash and cash equivalents (1) $ 33,255 $ 10,155 $ 23,100 $ — Restricted cash 5,287 5,287 — — Short-term investments 189,463 — 189,463 — Other current assets 2,985 — 2,985 — Total current assets $ 230,990 $ 15,442 $ 215,548 $ — Long-term investments (2) $ 5,558 $ — $ 5,558 $ — Other long-term assets 18,810 — 18,810 — Restricted cash – non-current 573 573 — — Total long-term assets $ 24,941 $ 573 $ 24,368 $ — Liabilities: Other current liabilities $ 543 $ — $ 543 $ — (1) The cash and cash equivalent amounts presented in the table above do not include cash of $192,432 and non-negotiable (2) The long-term investments presented in the table above do not include the Company’s minority interest investment in a private company, which is accounted for under the cost method. Money Market Funds Money market funds are cash and cash equivalents and are classified within Level 1 of the fair value hierarchy. Restricted Cash The Company has letters of credit, which require it to maintain specified cash deposit balances, consisting mainly of money market funds, as collateral. Such amounts have been classified as restricted cash and are classified as Level 1. Available-For-Sale Available-for-sale The Company measures its debt and equity investments at fair value. The Company’s available-for-sale Israeli Pension Assets Israeli pension assets represent investments in mutual funds, government securities and other time deposits. These investments are set aside for the retirement benefit of the employees at the Company’s Israeli subsidiaries. These funds are classified within Level 2 of the fair value hierarchy. Derivatives As a result of the Company’s global operating activities, the Company is exposed to market risks from changes in foreign currency exchange and interest 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

Derivatives

Derivatives	9 Months Ended
	Sep. 30, 2017
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, for which 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 Interest Rate Swap Agreement On September 30, 2016, the Company entered into an interest rate swap agreement to fix the rate on approximately 50% of its then-outstanding balance under the Credit Agreement, as described further in Note 9. This hedge fixes the interest rate paid on the hedged debt at 1.198% per annum plus the applicable credit spread, which was 2.25% as of September 30, 2017, through September 30, 2020. The interest rate swap is recorded at fair value on the balance sheet and changes in the fair value are recognized in other comprehensive income (loss) (“OCI”). To the extent that this arrangement is no longer an effective hedge, any ineffectiveness measured in the hedging relationship is recorded currently in earnings in the period it occurs. The notional amount of this transaction was $305,000 and had a fair value of $4,362 at September 30, 2017. Foreign Exchange Contracts 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, Euro and Taiwanese currencies. To the extent these derivatives are effective in off-setting As of September 30, 2017 and December 31, 2016, the Company had outstanding forward foreign exchange contracts with gross notional values of $86,217 and $120,208, respectively. The following tables provide a summary of the primary net hedging positions and corresponding fair values held as of September 30, 2017 and December 31, 2016: September 30, 2017 Currency Hedged (Buy/Sell) Gross Notional Fair Value (1) U.S. Dollar/Japanese Yen $ 29,929 $ (1 ) U.S. Dollar/South Korean Won 24,663 (324 ) U.S. Dollar/Euro 14,979 (1,052 ) U.S. Dollar/U.K. Pound Sterling 5,272 (315 ) U.S. Dollar/Taiwan Dollar 11,374 (273 ) Total $ 86,217 $ (1,965 ) December 31, 2016 Currency Hedged (Buy/Sell) Gross Notional Fair Value (1) U.S. Dollar/Japanese Yen $ 30,522 $ 763 U.S. Dollar/South Korean Won 50,049 1,342 U.S. Dollar/Euro 18,040 156 U.S. Dollar/U.K. Pound Sterling 6,067 117 U.S. Dollar/Taiwan Dollar 15,530 64 Total $ 120,208 $ 2,442 (1) Represents the fair value of the net (liability) asset amount included in the consolidated balance sheet. The following table provides a summary of the fair value amounts of the Company’s derivative instruments: Derivatives Designated as Hedging Instruments September 30, December 31, Derivative assets: Foreign exchange contracts (1) $ 425 $ 2,985 Interest rate hedge (2) 4,362 4,900 Derivative liabilities: Foreign exchange contracts (1) (2,390 ) (543 ) Total net derivative assets designated as hedging instruments $ 2,397 $ 7,342 (1) The derivative asset of $425 and $2,985 as of September 30, 2017 and December 31, 2016, respectively, related to foreign exchange contracts are classified in other current assets in the consolidated balance sheet. The derivative liability of $(2,390) and $(543) as of September 30, 2017 and December 31, 2016 are classified in other current liabilities in the consolidated balance sheet. 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. (2) The interest rate hedge assets of $4,362 and $4,900 as of September 30, 2017 and December 31, 2016, respectively, are classified in other assets in the consolidated balance sheet. The net amount of existing gains as of September 30, 2017 that the Company expects to reclassify from OCI into earnings within the next twelve months is immaterial. The following table provides a summary of the (losses) gains on derivatives designated as cash flow hedging instruments: Three Months Ended Nine Months Ended Derivatives Designated as Cash Flow Hedging Instruments 2017 2016 2017 2016 Forward exchange contracts: Net (loss) gain recognized in OCI (1) $ (220 ) $ 326 $ (4,462 ) $ (3,107 ) Net (loss) gain reclassified from accumulated OCI into income (2) $ (1,360 ) $ (764 ) $ (1,842 ) $ 487 (1) Net change in the fair value of the effective portion classified in OCI. (2) Effective portion classified in cost of products for the three and nine months ended September 30, 2017 and 2016. The tax effect of the gains or losses reclassified from accumulated OCI into income is immaterial. The following table provides a summary of the losses on derivatives not designated as hedging instruments: Three Months Ended Nine Months Ended Derivatives Not Designated as Hedging Instruments 2017 2016 2017 2016 Forward exchange contracts: Net loss recognized in income (1) $ (877 ) $ (339 ) $ (2,559 ) $ (1,283 ) (1) The Company enters into foreign exchange contracts to hedge against changes in the balance sheet for certain subsidiaries to mitigate the risk associated with certain foreign currency transactions in the ordinary course of business. These derivatives are not designated as hedging instruments and gains or losses from these derivatives are recorded immediately in selling, general and administrative expenses.

Inventories, net

Inventories, net	9 Months Ended
	Sep. 30, 2017
Inventory Disclosure [Abstract]
Inventories, net	6) Inventories, net Inventories consist of the following: September 30, December 31, Raw materials $ 177,677 $ 150,150 Work-in-process 54,909 39,105 Finished goods 86,874 86,614 $ 319,460 $ 275,869

Acquisitions and Dispositions

Acquisitions and Dispositions	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Acquisitions and Dispositions	7) Acquisitions and Dispositions Newport Corporation On April 29, 2016, the Company completed its acquisition of Newport Corporation (“Newport”) pursuant to an Agreement and Plan of Merger, dated as of February 22, 2016 (the “Merger Agreement”), by and among the Company, PSI Equipment, Inc., a wholly owned subsidiary of the Company (“Merger Sub”), and Newport (the “Newport Merger”). At the effective time of the Newport Merger and pursuant to the terms and conditions of the Merger Agreement, each share of Newport’s common stock that was issued and outstanding immediately prior to the effective time of the Newport Merger was converted into the right to receive $23.00 in cash, without interest and subject to deduction for any required withholding tax. Newport’s innovative solutions leverage its expertise in advanced technologies, including lasers, photonics and precision motion equipment, and optical components and sub-systems, The purchase price of Newport consisted of the following: Cash paid for outstanding shares (1) $ 905,254 Settlement of share-based compensation awards (2) 8,824 Cash paid for Newport debt (3) 93,200 Total purchase price 1,007,278 Less: Cash and cash equivalents acquired (61,463 ) Total purchase price, net of cash and cash equivalents acquired $ 945,815 (1) Represents cash paid of $23.00 per share for approximately 39,359,000 shares of Newport common stock, without interest and subject to a deduction for any required withholding tax. (2) Represents the vested but not issued portion of Newport share-based compensation awards as of the acquisition date of April 29, 2016. (3) Represents the cash paid for the outstanding balance of Newport’s senior secured revolving credit agreement. The Company funded the payment of the aggregate consideration with a combination of the Company’s available cash on hand and the proceeds from the Company’s senior secured Term Loan Facility, as described in Note 9. Under the acquisition method of accounting, the total acquisition consideration is allocated to the acquired tangible and intangible assets and assumed liabilities of Newport based on their fair values as of the acquisition date. Any excess of the acquisition consideration over the fair value of assets acquired and liabilities assumed is allocated to goodwill. The Company concluded that all such goodwill and intangible assets will not be deductible for tax purposes. The following table summarizes the allocation of the purchase price to the fair values assigned to assets acquired and liabilities assumed at the date of the Newport Merger: Current assets (including cash) $ 186,137 Inventory 142,714 Intangible assets 404,506 Goodwill 396,027 Property, plant and equipment 119,932 Long-term assets 22,725 Total assets acquired 1,272,041 Current liabilities 95,156 Intangible liability 4,302 Other long-term liabilities 165,305 Total liabilities assumed 264,763 Fair value of assets acquired and liabilities assumed 1,007,278 Less: Cash and cash equivalents acquired (61,463 ) Total purchase price, net of cash and cash equivalents acquired $ 945,815 The fair value write-up write-up The fair value write-up value-in-use, The acquired intangible assets are being amortized on a straight-line basis, which approximates the economic use of the asset. The following table reflects the allocation of the acquired intangible assets and liabilities and related estimate of useful lives: Order backlog $ 12,100 1 year Customer relationships 247,793 6-18 Trademarks and trade names 55,900 Indefinite Developed technology 75,386 4-8 years In-process 6,899 Undefined (1) Leasehold interest (favorable) 6,428 4-5 Total intangible assets $ 404,506 Leasehold interest (unfavorable) $ 4,302 (1) The useful lives of in-process The fair value of the acquired intangibles was determined using the income approach. In performing these valuations, the key underlying probability-adjusted assumptions of the discounted cash flows were projected revenues, gross margin expectations and operating cost estimates. The valuations were based on the information that was available as of the acquisition date and the expectations and assumptions that have been deemed reasonable by the Company’s management. There are inherent uncertainties and management judgment required in these determinations. This acquisition resulted in a purchase price that exceeded the estimated fair value of tangible and intangible assets, the excess amount of which was allocated to goodwill. The Company believes the amount of goodwill relative to identifiable intangible assets relates to several factors including: (1) potential buyer-specific synergies related to market opportunities for a combined product offering; and (2) potential to leverage the Company’s sales force to attract new customers and revenue and cross sell to existing customers. The results of this acquisition were included in the Company’s consolidated operations beginning on April 29, 2016. Newport constitutes the Company’s Light & Motion reportable segment (Note 16). Certain executives from Newport had severance provisions in their respective Newport employment agreements. The agreements included terms that were accounted for as dual-trigger arrangements. Through the Company’s acquisition accounting, the expense relating to these benefits was recognized in the combined entity’s financial statements, however, the benefit itself will not be distributed until the final provision is met by each eligible executive. The Company recorded costs of $6,631 and $3,334 as compensation expense and stock-based compensation expense, respectively, for the three and nine months ended September 30, 2016, respectively, in connection with these severance provisions. The shares underlying the restricted stock units and stock appreciation rights that are eligible for accelerated vesting if the executive exercises his rights are not issued as of each reporting period-end Pro-Forma The following unaudited pro-forma pro-forma pro-forma Three Months Ended Nine Months Ended 2016 2016 Total net revenues $ 380,660 $ 1,070,471 Net income 35,915 65,313 Net income per share: Basic $ 0.67 $ 1.22 Diluted $ 0.66 $ 1.21 The unaudited pro-forma (1) Incremental amortization and depreciation expense related to the estimated fair value of identifiable intangible assets and property, plant and equipment form the purchase price allocation. (2) Revenue adjustments as a result of the reduction in deferred revenue related to its estimated fair value. (3) Incremental interest expense related to the Company’s term loan credit agreement. (4) Excluding acquisition costs and inventory step-up (5) The tax impact of the above adjustments. Cost Method Investment in a Private Company In April 2016, the Company invested $9,300 for a minority interest in a private company, which operates in the field of semiconductor process equipment instrumentation. The Company accounted for this investment using the cost method of accounting. During the fourth quarter of 2016, the Company recognized an impairment loss on this investment of $5,000 based upon financial information of this private company. In July 2017, the Company invested an additional $100 in this private company. Sale of Data Analytics Solutions In April 2017, the Company completed the sale of its Data Analytics Solutions business for total proceeds of $72,509, net of cash sold and recorded a gain of $74,856. This business, which had revenues in 2016 of $12,700 and was included in the Vacuum & Analysis segment, was no longer a part of the Company’s long-term strategic objectives. The business did not qualify as a discontinued operation as this sale did not represent a strategic shift in the Company’s business, nor did the sale have a major effect on the Company’s operations. Therefore, the results of operations for all periods are included in the Company’s income from operations. The assets and liabilities of this business have not been reclassified or segregated in the consolidated balance sheet or consolidated statements of cash flows as the amounts were immaterial.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 30, 2017
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. The changes in the carrying amount of goodwill and accumulated impairment (loss) during the nine months ended September 30, 2017 and year ended December 31, 2016 were as follows: Nine Months Ended Twelve Months Ended Gross Accumulated Net Gross Accumulated Net Beginning balance at January 1 $ 727,999 $ (139,414 ) $ 588,585 $ 339,117 $ (139,414 ) $ 199,703 Acquired goodwill (1) — — — 396,027 — 396,027 Sale of business (2) (3,115 ) — (3,115 ) — — — Impairment loss (3) — (4,862 ) (4,862 ) — — — Foreign currency translation 8,491 — 8,491 (7,145 ) — (7,145 ) Ending balance at September 30, 2017 and December 31, 2016 $ 733,375 $ (144,276 ) $ 589,099 $ 727,999 $ (139,414 ) $ 588,585 (1) During 2016, the Company recorded $396,027 of goodwill related to the Newport Merger. (2) In 2017, the Company sold its Data Analytics business and, as a result, charged the related goodwill of $3,115 to the gain on sale of business. (3) In 2017, the Company recorded an impairment loss of $4,862 related to the write-off Intangible Assets Components of the Company’s intangible assets are comprised of the following: As of September 30, 2017: Gross Impairment (1) Accumulated Foreign Net Completed technology $ 176,586 $ (105 ) $ (114,095 ) $ 49 $ 62,435 Customer relationships 285,044 (1,406 ) (43,397 ) 832 241,073 Patents, trademarks, trade names and other 111,723 — (38,855 ) (42 ) 72,826 $ 573,353 $ (1,511 ) $ (196,347 ) $ 839 $ 376,334 (1) In 2017, the Company recorded impairment charges of $1,511 related to the write-off As of December 31, 2016: Gross Impairment Accumulated Foreign Net Completed technology (1) $ 176,586 $ — $ (97,707 ) $ (1,068 ) $ 77,811 Customer relationships (1) 285,044 — (29,709 ) (3,404 ) 251,931 Patents, trademarks, trade names and other (1) 111,723 — (33,397 ) (64 ) 78,262 $ 573,353 $ — $ (160,813 ) $ (4,536 ) $ 408,004 (1) During 2016, the Company recorded $404,506 of separately identified intangible assets related to the Newport Merger, of which $75,386 was completed technology, $247,793 was customer relationships and $81,327 was patents, trademarks, trade names, in-process Aggregate amortization expense related to acquired intangibles for the nine months ended September 30, 2017 and 2016 was $34,946 and $22,990, respectively. The amortization expense for the nine months ended September 30, 2017, was net of $588 amortization income from unfavorable lease commitments. Aggregate net amortization expense related to acquired intangible assets and unfavorable lease commitments for future years is as follows: Year Amount 2017 (remaining) $ 10,767 2018 43,273 2019 40,160 2020 28,115 2021 20,302 2022 17,621 Thereafter 157,010

Debt

Debt	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Debt	9) Debt Term Loan Credit Agreement In connection with the completion of the Newport Merger, the Company entered into a term loan credit agreement (the “Credit Agreement”) with Barclays Bank PLC, as administrative agent and collateral agent, and the lenders from time to time party thereto (the “Lenders”), that provided senior secured financing of $780,000, subject to increase at the Company’s option in accordance with the Credit Agreement (the “Term Loan Facility”). Borrowings under the Term Loan Facility bear interest per annum at one of the following rates selected by the Company: (a) a base rate determined by reference to the highest of (1) the federal funds effective rate plus 0.50%, (2) the “prime rate” quoted in The Wall Street Journal, (3) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for an interest period of one month adjusted for certain additional costs, plus 1.00%, and (4) a floor of 1.75%, plus, in each case, an applicable margin (that was initially 3.00% and was decreased as described below); or (b) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for the interest period relevant to such borrowing adjusted for certain additional costs, subject to a LIBOR rate floor of 0.75%, plus an applicable margin (that was initially 4.00% and was decreased as described below). The Company has elected the interest rate as described in clause (b). The Term Loan Facility was issued with original issue discount of 1.00% of the principal amount thereof. On June 9, 2016, the Company entered into Amendment No. 1 (the “Re-pricing Re-pricing pre-payment “Re-pricing Re-pricing Re-pricing pre-payment Re-pricing On September 30, 2016, the Company entered into an interest rate swap agreement, which has a maturity date of September 30, 2020, to fix the rate on $335,000 of the then-outstanding balance of the Credit Agreement. The rate is fixed at 1.198% per annum plus the applicable credit spread, which was 2.25% at September 30, 2017. At September 30, 2017, the notional amount of the interest rate swap agreement was $305,000. On December 14, 2016, the Company entered into Amendment No. 2 (the “Re-pricing Re-pricing pre-payment Re-pricing Re-pricing Re-pricing On July 6, 2017, the Company entered into Amendment No. 3 (the “Re-pricing Re-pricing Re-pricing Re-pricing In July 2017 and August 2017, the Company prepaid $50,000 and $75,000, respectively, of principal under the Credit Agreement. As of September 30, 2017, after total pre-payments The Company incurred $28,747 of deferred finance fees, original issue discount and a re-pricing pre-payments re-pricing Under the Credit Agreement, the Company is required to prepay outstanding term loans, subject to certain exceptions, with portions of its annual excess cash flow as well as with the net cash proceeds of certain asset sales, certain casualty and condemnation events and the incurrence or issuance of certain debt. The Company is also required to make scheduled quarterly payments each equal to 0.25% of the principal amount of the term loans outstanding on December 14, 2016 (the date of the Re-pricing All obligations under the Term Loan Facility are guaranteed by certain of the Company’s domestic subsidiaries, and are collateralized by substantially all of the Company’s assets and the assets of such subsidiaries, subject to certain exceptions and exclusions. The Credit Agreement contains customary representations and warranties, affirmative and negative covenants and provisions relating to events of default. If an event of default occurs, the Lenders under the Term Loan Facility will be entitled to take various actions, including the acceleration of amounts due under the Term Loan Facility and all actions generally permitted to be taken by a secured creditor. At September 30, 2017, the Company was in compliance with all covenants under the Credit Agreement. Senior Secured Asset-Based Revolving Credit Facility In connection with the completion of the Newport Merger, the Company also entered into an asset-based credit agreement with Deutsche Bank AG New York Branch, as administrative agent and collateral agent, the other borrowers from time to time party thereto, and the lenders and letters of credit issuers from time to time party thereto (the “ABL Facility”), that provides senior secured financing of up to $50,000, subject to a borrowing base limitation. The borrowing base for the ABL Facility at any time equals the sum of: (a) 85% of certain eligible accounts; plus (b) subject to certain notice and field examination and appraisal requirements, the lesser of (i) the lesser of (A) 65% of the lower of cost or market value of certain eligible inventory and (B) 85% of the net orderly liquidation value of certain eligible inventory and (ii) 30% of the borrowing base; minus (c) reserves established by the administrative agent; provided that until the administrative agent’s receipt of a field examination of accounts receivable the borrowing base shall be equal to 70% of the book value of certain eligible accounts. The ABL Facility includes borrowing capacity in the form of letters of credit up to $15,000. The Company has not drawn against the ABL Facility as of September 30, 2017. Borrowings under the ABL Facility bear interest per annum at one of the following rates selected by the Company: (a) a base rate determined by reference to the highest of (1) the federal funds effective rate plus 0.50%, (2) the “prime rate” quoted in The Wall Street Journal, and (3) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for an interest period of one month adjusted for certain additional costs, plus 1.00%, plus, in each case, an initial applicable margin of 0.75%; and (b) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for the interest period relevant to such borrowing adjusted for certain additional costs, plus an initial applicable margin of 1.75%. Commencing with the completion of the first fiscal quarter ending after the closing of the ABL Facility, the applicable margin for borrowings thereunder is subject to upward or downward adjustment each fiscal quarter, based on the average historical excess availability during the preceding quarter. The Company incurred $1,201 of costs in connection with the ABL Facility, which were capitalized and included in other assets in the accompanying consolidated balance sheets and will be amortized to interest expense using the straight-line method over the contractual term of five years of the ABL Facility. In addition to paying interest on outstanding principal under the ABL Facility, the Company is required to pay a commitment fee in respect of the unutilized commitments thereunder. The initial commitment fee is 0.375% per annum. The total commitment fee recognized in interest expense for the nine months ended September 30, 2017, was $242. Commencing with the completion of the first fiscal quarter ending after the closing of the ABL Facility, the commitment fee is subject to downward adjustment based on the amount of average unutilized commitments for the three month period immediately preceding such adjustment date. The Company must also pay customary letter of credit fees and agency fees. Lines of Credit and Short-Term Borrowing Arrangements One of the Company’s Japanese subsidiaries has lines of credit and short-term borrowing arrangements with two financial institutions, which arrangements generally expire and are renewed at three month intervals. The lines of credit provided for aggregate borrowings as of September 30, 2017 of up to an equivalent of $20,444 U.S. dollars. One of the borrowing arrangements has an interest rate based on the Tokyo Interbank Offer Rate at the time of borrowing and the other has an interest rate based on the Japanese Short-Term Prime Lending Rate. There were no borrowings outstanding under these arrangements at September 30, 2017 and December 31, 2016. The Company assumed various revolving lines of credit and a financing facility with the completion of the Newport Merger. These revolving lines of credit and financing facility have no expiration date and provided for aggregate borrowings as of September 30, 2017 of up to an equivalent of $11,111 U.S. dollars. These lines of credit have a base interest rate of 1.25% plus a Japanese Yen overnight LIBOR rate. One of the Company’s Austrian subsidiaries has four outstanding loans from the Austrian government to fund research and development. These loans are unsecured and do not require principal repayment as long as certain conditions are met. Interest on these loans is payable semi-annually. The interest rates associated with these loans range from 0.75% - 2.00%. September 30, December 31, Short-term debt: Japanese lines of credit $ 3,912 $ 4,245 Japanese receivables financing facility — 458 Other debt 108 8 Current portion of Term Loan Facility — 6,282 $ 4,020 $ 10,993 September 30, December 31, Long-term debt: Austrian loans due through March 2020 $ 705 $ 548 Term Loan Facility, net (1) 435,026 600,681 $ 435,731 $ 601,229 (1) Net of deferred financing fees, original issuance discount and re-pricing The Company recognized interest expense of $23,001 and $20,526 for the nine months ended September 30, 2017 and 2016, respectively. The increase for the nine months ended September 30, 2017, compared to 2016, was due to the fact that the nine month period ended September 30, 2016 only included five months of interest expense as a result of the Newport Merger. Contractual maturities of the Company’s debt obligations as of September 30, 2017 are as follows: Year Amount 2017 (remaining) $ 4,020 2018 13 2019 617 2020 75 2021 — 2022 — Thereafter 448,464

Product Warranties

Product Warranties	9 Months Ended
	Sep. 30, 2017
Guarantees and Product Warranties [Abstract]
Product Warranties	10) Product Warranties The Company records 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. Product warranty activities were as follows: Nine Months Ended 2017 2016 Beginning of period $ 8,261 $ 5,205 Assumed product warranty liability from Newport Merger — 3,040 Provision for product warranties 11,941 5,067 Direct and other charges to warranty liability (10,080 ) (5,170 ) End of period (1) $ 10,122 $ 8,142 (1) Short-term product warranty of $9,725 and long-term product warranty of $397 as of September 30, 2017, are included within other current liabilities and other liabilities, respectively, within the accompanying condensed consolidated balance sheet.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	11) Income Taxes The Company’s effective tax rate for the three and nine months ended September 30, 2017 was 25.0% and 22.3%, respectively. The effective tax rate for the three and nine months ended September 30, 2017 and related income tax expense, was lower than the U.S. statutory tax rate mainly due to the geographic mix of income earned by the Company’s international subsidiaries being taxed at rates lower than the U.S. statutory tax rate, the tax benefit of windfall stock compensation deductions and the deduction for domestic production activities. These amounts were partially offset by taxes accrued, net of foreign tax credits, on actual and planned distributions from the Company’s international subsidiaries. The Company’s effective tax rate for the three and nine months ended September 30, 2016 was 23.0% and 24.4%, respectively. The effective tax rate for the three and nine months ended September 30, 2016 was lower than the U.S. statutory tax rate primarily due to the geographic mix of income and profits earned by the Company’s international subsidiaries being taxed at rates lower than the U.S. statutory tax rate, the federal research credit and the deduction for domestic production activities. These amounts were partially offset by taxes paid in connection with the Company’s reorganization of certain international subsidiaries and state income taxes. As of September 30, 2017, the total amount of gross unrecognized tax benefits, which excludes interest and penalties, was approximately $26,571. At December 31, 2016 the total amount of gross unrecognized tax benefits, which excludes interest and penalties, was approximately $25,465. As of September 30, 2017, there were $18,091 of net unrecognized tax benefits, excluding interest and penalties that, if recognized, 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. As of September 30, 2017 and December 31, 2016, the Company had accrued interest on unrecognized tax benefits of approximately $367 and $491, respectively. Over the next 12 months it is reasonably possible that the Company may recognize approximately $1,733 of previously net unrecognized tax benefits, excluding interest and penalties, related to various U.S. federal, state and foreign tax positions primarily as a result of the expiration of certain statutes of limitations. The Company and its subsidiaries are subject to examination by U.S. federal, state and foreign tax authorities. The Internal Revenue Service commenced an examination of the Company’s U.S. federal tax filing for the 2015 tax year during the quarter ended September 30, 2017. The U.S. statute of limitations remains open for tax years 2014 through present. The statute of limitations for the Company’s tax filings in other jurisdictions varies between fiscal years 2012 through present. The Company also has certain federal credit carry-forwards and state tax loss and credit carry-forwards that are open to examination for tax years 2000 through the present.

Pension Plans

Pension Plans	9 Months Ended
	Sep. 30, 2017
Retirement Benefits [Abstract]
Pension Plans	12) Pension Plans As a result of the acquisition of Newport, the Company has assumed all assets and liabilities of Newport’s defined benefit pension plans, which cover substantially all of its full-time employees in France, Germany, Israel and Japan. In addition, there are certain pension liabilities relating to former employees in the United Kingdom. The German plan is unfunded, as permitted under the plan and applicable laws. The net periodic benefit costs were approximately $254 and $761, for the three and nine month periods ended September 30, 2017, respectively, and approximately $673 and $1,126 for the three and nine month periods ended September 30, 2016, respectively. The Company made contributions of approximately $113 and $453 to these plans, during the three and nine month periods ended September 30, 2017, respectively, as required by local pension accounting laws.

Net Income Per Share

Net Income Per Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Net Income Per Share	13) Net Income Per Share The following table sets forth the computation of basic and diluted net income per share: Three Months Ended Nine Months Ended 2017 2016 2017 2016 Numerator: Net income $ 75,994 $ 32,549 $ 261,494 $ 59,322 Denominator: Shares used in net income per common share – basic 54,282,000 53,574,000 54,076,000 53,423,000 Effect of dilutive securities: Restricted stock units, stock appreciation rights and shares issued under employee stock purchase plan 819,000 741,000 944,000 472,000 Shares used in net income per common share – diluted 55,101,000 54,315,000 55,020,000 53,895,000 Net income per common share: Basic $ 1.40 $ 0.61 $ 4.84 $ 1.11 Diluted $ 1.38 $ 0.60 $ 4.75 $ 1.10 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 (restricted stock units and stock appreciation rights) had been converted to such common shares, and if such assumed conversion is dilutive. For the three and nine months ended September 30, 2017, there were approximately 200 and 300 weighted-average restricted stock units, respectively, that would have had an anti-dilutive effect on EPS, and would thus need to be excluded from the computation of diluted weighted-average shares. For the three and nine months ended September 30, 2016, there were 0 and approximately 500 weighted-average restricted stock units, respectively, that would have had an anti-dilutive effect on EPS, and would thus need to be excluded from the computation of diluted weighted-average shares.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Stockholders' Equity	14) Stockholders’ Equity Share Repurchase Program On July 25, 2011, the Company’s Board of Directors approved a share repurchase program for the repurchase of up to an aggregate of $200,000 of its outstanding common stock from time to time in open market purchases, privately negotiated transactions or through other appropriate means. The timing and quantity of any shares repurchased will depend upon a variety of factors, including business conditions, stock market conditions and business development activities, including, but not limited to, merger and acquisition opportunities. These repurchases may be commenced, suspended or discontinued at any time without prior notice. The Company has repurchased approximately 1,770,000 shares of common stock for approximately $52,000 pursuant to the program since its adoption. There were no shares repurchased during the nine months ended September 30, 2017. During the nine months ended September 30, 2016, the Company repurchased approximately 45,000 shares of its common stock for $1,545, or an average price of $34.50 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. The Company’s Board of Directors declared a cash dividend of $0.175 per share in the first, second and third quarters of 2017, which totaled $28,403. The Company’s Board of Directors declared a cash dividend of $0.17 per share in the first, second and third quarters of 2016, which totaled $27,249. On October 30, 2017, the Company’s Board of Directors declared a quarterly cash dividend of $0.18 per share to be paid on December 8, 2017 to shareholders of record as of November 27, 2017. 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. In addition, under the terms of the Company’s senior secured Term Loan Facility and its senior secured asset-based revolving credit facility, the Company may be restricted from paying dividends under certain circumstances.

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	15) Stock-Based Compensation In connection with the completion of the Newport Merger, the Company assumed: • all restricted stock units (“RSUs”) granted under any Newport equity plan that were outstanding immediately prior to the effective time of the Newport Merger, and as to which shares of Newport common stock were not fully distributed in connection with the closing of the Newport Merger, and • all stock appreciation rights (“SARs”) granted under any Newport equity plan, whether vested or unvested, that were outstanding immediately prior to the effective time of the Newport Merger. As of the effective time of the Newport Merger, based on a formula provided in the Merger Agreement, (a) the Newport RSUs were converted automatically into RSUs with respect to 360,674 shares of the Company’s common stock (the “Assumed RSUs”), and (b) the Newport stock appreciation rights were converted automatically into stock appreciation rights with respect to 899,851 shares of the Company’s common stock (the “Assumed SARs”). Included in the total number of Assumed RSUs were 36,599 RSUs for outside directors that were part of the Newport Deferred Compensation Plan (the “DC Plan”), from which 19,137 underlying shares were released in May 2016, and 5,515 underlying shares were released in May 2017. Combined with an additional 286 shares that were added to the DC Plan due to reinvested dividends as of September 30, 2017, 12,233 RSUs remain outstanding under the DC Plan. These Assumed RSUs will not become issued shares until their respective release dates. The shares of the Company’s common stock that are subject to the Assumed SARs and the Assumed RSUs are issuable pursuant to the Company’s 2014 Stock Incentive Plan (the “Plan”). The 1,260,525 shares of the Company’s common stock that are issuable pursuant to the Assumed RSUs and the Assumed SARs under the Plan were registered under the Securities Act of 1933, as amended (the “Securities Act”), on a registration statement on Form S-8. S-8. During the nine months ended September 30, 2017, the Company granted 388,137 RSUs with a weighted average grant date fair value of $67.58. There were no SARs granted during the nine months ended September 30, 2017. The total stock-based compensation expense included in the Company’s consolidated statements of income and comprehensive income was as follows: Three Months Ended Nine Months Ended 2017 2016 2017 2016 Cost of revenues $ 1,016 $ 666 $ 3,133 $ 1,996 Research and development expense 712 551 2,284 1,614 Selling, general and administrative expense 3,117 3,941 14,417 16,216 Total pre-tax $ 4,845 $ 5,158 $ 19,834 $ 19,826 At September 30, 2017, the total compensation expense related to unvested stock-based awards granted to employees, officers and directors under the Plan that had not been recognized was $25,051, net of estimated forfeitures. The future compensation expense is recognized on a straight-line basis over the requisite service period, net of estimated forfeitures except for retirement eligible employees in which the Company expenses the fair value of the grant in the period the grant is issued. The Company considers many factors when estimating expected forfeitures, including types of awards and historical experience. Actual results and future changes in estimates may differ substantially from the Company’s current estimates. The following table presents the activity for RSUs under the Plan: Nine Months Ended Outstanding RSUs Weighted Average RSUs – beginning of period 1,325,516 $ 34.38 Accrued dividend shares 99 74.58 Granted 388,137 67.58 Vested (681,365 ) 34.53 Forfeited (71,783 ) 37.45 RSUs – end of period 960,604 $ 47.46 The following table presents the activity for SARs under the Plan: Nine Months Ended Outstanding SARs Weighted Average SARs – beginning of period 599,334 $ 28.10 Granted — — Exercised (258,854 ) 27.52 Forfeited or expired (16,782 ) 27.88 SARs Outstanding – end of period 323,698 $ 28.58 At September 30, 2017 the Company’s outstanding and exercisable SARs, the weighted-average base value, the weighted average remaining contractual life and the aggregate intrinsic value thereof, were as follows: Number of Weighted Weighted Aggregate SARs outstanding 323,698 $ 28.58 3.4 $ 21,323 SARs exercisable 260,049 $ 27.95 3.1 $ 17,292

Business Segment, Geographic Ar

Business Segment, Geographic Area, Product and Significant Customer Information	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Business Segment, Geographic Area, Product and Significant Customer Information	16) Business Segment, Geographic Area, Product and Significant Customer Information The Company is a global provider of instruments, subsystems and process control solutions that measure, control, power, monitor and analyze critical parameters of advanced manufacturing processes to improve process performance and productivity. The Company’s products are derived from its core competencies in pressure measurement and control, flow measurement and control, gas and vapor delivery, gas composition analysis, residual gas analysis, leak detection, control technology, ozone generation and delivery, RF & DC power, reactive gas generation, vacuum technology, lasers, photonics, sub-micron The Company’s Chief Operating Decision Maker (“CODM”) utilizes financial information to make decisions about allocating resources and assessing performance for the entire Company, which is used in the decision making process to assess performance. Based upon the information provided to the CODM, the Company has determined it has two reportable segments. Effective April 29, 2016, in conjunction with the Newport Merger, the Company changed its reportable segments based upon the organizational structure of the Company and how the CODM utilizes information provided to allocate resources and make decisions. The Company’s two reportable segments are: Vacuum & Analysis and Light & Motion. The Vacuum & Analysis segment represents the legacy MKS business and the Light & Motion segment represents the legacy Newport business. The Vacuum & Analysis segment provides a broad range of instruments, components and subsystems which are derived from the Company’s core competencies in pressure measurement and control, flow measurement and control, gas and vapor delivery, gas composition analysis, residual gas analysis, leak detection, control technology, ozone generation and delivery, RF & DC power, reactive gas generation and vacuum technology. The Light & Motion segment provides a broad range of instruments, components and subsystems which are derived from the Company’s core competencies in lasers, photonics, sub-micron The Company derives its segment results directly from the manner in which results are reported in its management reporting system. The accounting policies that the Company uses to derive reportable segment results are substantially the same as those used for external reporting purposes. The Company does not disclose external or intersegment revenues separately by reportable segment as this information is not presented to the CODM for decision making purposes. The following table sets forth net revenues by reportable segment: Three Months Ended Nine Months Ended 2017 2016 2017 2016 Vacuum & Analysis $ 308,176 $ 229,167 $ 895,979 $ 620,207 Light & Motion 178,091 151,493 508,198 269,995 $ 486,267 $ 380,660 $ 1,404,177 $ 890,202 The following table sets forth a reconciliation of segment gross profit to consolidated net income: Three Months Ended Nine Months Ended 2017 2016 2017 2016 Gross profit by reportable segment: Vacuum & Analysis $ 141,438 $ 104,232 $ 410,228 $ 273,004 Light & Motion 86,557 64,153 242,897 109,207 Total gross profit by reportable segment 227,995 168,385 653,125 382,211 Operating expenses: Research and development 32,548 32,268 99,510 77,709 Selling, general and administrative 71,839 68,016 218,038 161,545 Acquisition and integration costs 2,466 2,641 4,698 25,190 Restructuring 10 — 2,596 24 Asset impairment — — 6,719 — Amortization of intangible assets 10,977 12,452 34,946 22,990 Income from operations 110,155 53,008 286,618 94,753 Gain on sale of business — — 74,856 — Interest and other (expense), net (8,784 ) (10,760 ) (24,846 ) (16,332 ) Income before income taxes 101,371 42,248 336,628 78,421 Provision for income taxes 25,377 9,699 75,134 19,099 Net income $ 75,994 $ 32,549 $ 261,494 $ 59,322 The following table sets forth capital expenditures by reportable segment for the three and nine months ended September 30, 2017 and 2016: Vacuum & Light & Total Three Months Ended September 30, 2017: Capital expenditures $ 4,212 $ 3,906 $ 8,118 Nine Months Ended September 30, 2017: Capital expenditures $ 10,114 $ 7,743 $ 17,857 Three Months Ended September 30, 2016: Capital expenditures $ 2,772 $ 1,923 $ 4,695 Nine Months Ended September 30, 2016: Capital expenditures $ 7,964 $ 3,995 $ 11,959 The following table sets forth depreciation and amortization by reportable segment for the three and nine months ended September 30, 2017 and 2016: Vacuum & Light & Total Three Months Ended September 30, 2017: Depreciation and amortization $ 5,058 $ 15,071 $ 20,129 Nine Months Ended September 30, 2017: Depreciation and amortization $ 15,277 $ 47,273 $ 62,550 Three Months Ended September 30, 2016: Depreciation and amortization $ 5,142 $ 16,907 $ 22,049 Nine Months Ended September 30, 2016: Depreciation and amortization $ 15,628 $ 28,129 $ 43,757 Total income tax expense is not presented by reportable segment because the necessary information is not available or used by the CODM. The following table sets forth segment assets by reportable segment: September 30, 2017: Vacuum & Light & Corporate, Total Segment assets: Accounts receivable $ 196,149 $ 108,223 $ (24,070 ) $ 280,302 Inventory, net 190,252 129,208 — 319,460 Total segment assets $ 386,401 $ 237,431 $ (24,070 ) $ 599,762 December 31, 2016: Vacuum & Light & Corporate, Total Segment assets: Accounts receivable $ 148,516 $ 121,516 $ (21,275 ) $ 248,757 Inventory, net 165,040 110,829 — 275,869 Total segment assets $ 313,556 $ 232,345 $ (21,275 ) $ 524,626 The following table sets forth a reconciliation of segment assets to consolidated total assets: September 30, December 31, Total segment assets $ 599,762 $ 524,626 Cash and cash equivalents, restricted cash and investments 545,318 433,231 Other current assets 60,716 50,770 Property, plant and equipment, net 166,928 174,559 Goodwill and intangible assets, net 965,433 996,589 Other assets 32,188 32,467 Consolidated total assets $ 2,370,345 $ 2,212,242 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 Nine Months Ended 2017 2016 2017 2016 Net revenues: United States $ 237,592 $ 198,305 $ 700,291 $ 460,994 Korea 60,908 32,642 165,613 79,240 Japan 38,411 26,970 113,068 68,738 Asia (excluding Korea and Japan) 94,084 75,179 273,957 173,526 Europe 55,272 47,564 151,248 107,704 $ 486,267 $ 380,660 $ 1,404,177 $ 890,202 September 30, December 31, Long-lived assets: (1) United States $ 116,607 $ 122,547 Europe 28,516 28,717 Asia 48,091 49,406 $ 193,214 $ 200,670 (1) Long-lived assets include property, plant and equipment, net and certain other long-term assets, excluding long-term tax related accounts. Goodwill associated with each of our reportable segments is as follows: September 30, December 31, Reportable segment: Vacuum & Analysis $ 196,885 $ 199,453 Light & Motion 392,214 389,132 Total goodwill $ 589,099 $ 588,585 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 seven groups of similar products based upon the similarity of product function. The following table sets forth worldwide net revenue for each group of products: Three Months Ended Nine Months Ended 2017 2016 2017 2016 Analytical and Control Solutions Products $ 33,068 $ 29,989 $ 97,689 $ 80,754 Materials Delivery Solutions Products 45,614 36,243 136,366 97,914 Power, Plasma and Reactive Gas Solutions Products 148,194 98,772 413,633 259,731 Pressure and Vacuum Measurement Products 81,300 64,163 248,291 181,808 Lasers Products 56,623 45,597 153,866 83,533 Optics Products 52,548 44,331 149,759 79,594 Photonics Products 68,920 61,565 204,573 106,868 $ 486,267 $ 380,660 $ 1,404,177 $ 890,202 Sales of Analytical and Control Solutions Products, Materials Delivery Solutions Products, Power, Plasma and Reactive Gas Solutions Products, and Pressure and Vacuum Measurement Products are included in the Company’s Vacuum & Analysis segment. Sales of Lasers Products, Optics Products, and Photonics Products are included in the Light & Motion segment. Major Customers The Company had two customers with net revenues greater than 10% of total net revenues in the periods shown below: Three Months Ended Nine Months Ended 2017 2016 2017 2016 Applied Materials, Inc. 12 % 12 % 13 % 14 % LAM Research Corporation 11 % 9 % 12 % 11 %

Restructuring

Restructuring	9 Months Ended
	Sep. 30, 2017
Restructuring and Related Activities [Abstract]
Restructuring	17) Restructuring During the nine months ended September 30, 2017 and 2016, the Company recorded restructuring charges of $2,596 and $0, respectively. The restructuring charges for the nine months ended September 30, 2017, primarily relate to: (i) the discontinuation of a product line resulting in the consolidation of two manufacturing plants related to our Light & Motion segment, which consolidation is expected to be completed by December 31, 2017, (ii) the restructuring of one of our international facilities and (iii) the consolidation of two sales offices. The activity related to the Company’s restructuring accrual is shown below: Nine Months Ended Balance at December 31, 2016 $ 540 Charged to expense 2,596 Payments and adjustment (608 ) Balance at September 30, 2017 $ 2,528

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	18) Commitments and Contingencies On March 9, 2016, a putative class action lawsuit captioned Dixon Chung v. Newport Corp., et al. A-16-733154-C, Also on March 25, 2016, a second putative class action complaint captioned Hubert C. Pincon v. Newport Corp., et al. A-16-734039-B, On April 14, 2016, the Court granted plaintiffs’ motion to consolidate the Pincon and Chung actions and appointed counsel in the Pincon action as lead counsel. Also on April 14, 2016, the Court granted plaintiffs’ motion for expedited discovery and scheduled a hearing on plaintiffs’ anticipated motion for a preliminary injunction for April 25, 2016. On April 20, 2016, plaintiffs filed a motion to vacate the hearing on their anticipated motion for a preliminary injunction and notified the Court that they did not presently intend to file a motion for a preliminary injunction regarding the Merger Agreement. On April 22, 2016, the Court vacated the hearing on plaintiffs’ anticipated motion for a preliminary injunction. In August 2016, plaintiffs completed the expedited discovery that the Court ordered. On October 19, 2016, plaintiffs filed an amended complaint captioned In re Newport Corporation Shareholder Litigation, Case No. A-16-733154-B, pre- 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 Pr25

Recently Issued Accounting Pronouncements (Policies)	9 Months Ended
	Sep. 30, 2017
Accounting Changes and Error Corrections [Abstract]
Recently Issued Accounting Pronouncements	In August 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-12, In May 2017, the FASB issued ASU 2017-09, In March 2017, the FASB issued ASU 2017-07, In January 2017, the FASB issued ASU 2017-01, In November 2016, the FASB issued ASU 2016-18, 2016-15. beginning-of-period end-of-period 2016-15. In October 2016, the FASB issued ASU 2016-16, In August 2016, the FASB issued ASU 2016-15, In February 2016, the FASB issued ASU 2016-02, In January 2016, the FASB issued ASU 2016-01, “Financial 825-10): In May 2014, the FASB issued ASU 2014-09, 2014-09 2014-09 In March, April, May and December 2016 and September 2017, the FASB issued additional updates to the new revenue standard relating to reporting revenue on a gross versus net basis, identifying performance obligations and licensing arrangements, narrow-scope improvements and practical expedients, and technical corrections and improvements, respectively. The Company has established a cross functional project steering committee and implementation team to identify potential differences that would result from applying the requirements of the new standard to the Company’s revenue contracts and related expense line items. The Company has reviewed its plan for the implementation and will continue to report the status against that plan to the Company’s Audit Committee. To date, the Company has made significant progress in evaluating the potential changes that the adoption of the new standard may have on its future financial reporting and disclosures. The Company has identified the various revenue streams, including product revenues, service revenues, installation and training, that could be impacted by Topic 606 and has reviewed individual customer contracts related to these revenue streams. The new revenue standard will primarily impact the Company’s recording of repair revenue and customized products, which will be recognized over time under Topic 606 as opposed to a point in time under the current standard. The Company is in the process of finalizing and documenting its assumptions used in quantifying the impact adoption of the new revenue standard will have on the Company, which could vary quarter to quarter. Based on the Company’s preliminary analysis, it does not expect the adoption of the new guidance to have a material impact on the timing or amount of its revenue recognition. In addition, the Company does not expect any major changes to be made to its existing accounting systems or internal controls. The Company will continue to assess the effect that the new revenue guidance will have on its consolidated financial statements, disclosures and related controls, and will disclose any material effects, if any, when known.
Intangibles-Goodwill and Other	In January 2017, the FASB issued ASU 2017-04,

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Short-Term and Long-Term Investments Available-for-Sale and Cost Method Investments	The fair value of investments classified as short-term consists of the following: September 30, December 31, Available-for-sale Time deposits and certificates of deposit $ 21,503 $ 23,818 Bankers’ acceptance drafts 3,452 1,439 Asset-backed securities 39,702 36,809 Commercial paper 21,215 24,381 Corporate obligations 80,099 46,707 Municipal bonds 45 591 Promissory note 1,075 675 U.S. treasury obligations 25,777 25,414 U.S. agency obligations 35,763 29,629 $ 228,631 $ 189,463 Investments classified as long-term consists of the following: September 30, December 31, Available-for-sale Group insurance contracts $ 6,193 $ 5,558 Cost method investments: Minority interest in a private company (1) 4,400 4,300 $ 10,593 $ 9,858 (1) In April 2016, the Company invested $9,300 for a minority interest in a private company. For the year ended December 31, 2016, the Company recognized $5,000 of impairment charges related to this cost method investment. In July 2017, the Company invested an additional $100 in this private company.
Gross Unrealized Gains and (Losses) Aggregated by Investment Category	The following tables show the gross unrealized gains and (losses) aggregated by investment category for available-for-sale Cost Gross Gross Estimated As of September 30, 2017: Short-term investments: Available-for-sale Time deposits and certificates of deposit $ 21,501 $ 2 $ — $ 21,503 Bankers’ acceptance drafts 3,452 — — 3,452 Asset-backed securities 39,709 17 (24 ) 39,702 Commercial paper 21,278 — (63 ) 21,215 Corporate obligations 80,020 87 (8 ) 80,099 Municipal bonds 45 — — 45 Promissory note 1,075 — — 1,075 U.S. treasury obligations 25,756 21 — 25,777 U.S. agency obligations 35,756 10 (3 ) 35,763 $ 228,592 $ 137 $ (98 ) $ 228,631 Cost Gross Gross Estimated As of September 30, 2017: Long-term investments: Available-for-sale Group insurance contracts $ 6,193 $ — $ — $ 6,193 Cost Gross Gross Estimated As of December 31, 2016: Short-term investments: Available-for-sale Time deposits and certificates of deposit $ 23,818 $ — $ — $ 23,818 Bankers acceptance drafts 1,439 — — 1,439 Asset-backed securities 36,847 6 (44 ) 36,809 Commercial paper 24,423 — (42 ) 24,381 Corporate obligations 46,700 21 (14 ) 46,707 Municipal bonds 591 — — 591 Promissory note 675 — — 675 U.S. treasury obligations 25,414 — — 25,414 U.S. agency obligations 29,631 8 (10 ) 29,629 $ 189,538 $ 35 $ (110 ) $ 189,463 Cost Gross Gross Estimated As of December 31, 2016: Long-term investments: Available-for-sale Group insurance contracts $ 6,276 $ — $ (718 ) $ 5,558

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis	Assets and liabilities of the Company are measured at fair value on a recurring basis as of September 30, 2017 and are summarized as follows: Fair Value Measurements at Reporting Date Using Description September 30, Quoted Prices in Significant Significant Assets: Cash equivalents: Money market funds $ 3,872 $ 3,872 $ — $ — Time deposits and certificates of deposit — — — — Bankers’ acceptance drafts 338 — 338 — Commercial paper 21,792 — 21,792 — Corporate obligations 2,269 — 2,269 — U.S. agency obligations 6,595 — 6,595 — Restricted cash – money market funds 117 117 — — Available-for-sale Time deposits and certificates of deposit 21,503 — 21,503 — Bankers’ acceptance drafts 3,452 — 3,452 — Asset-backed securities 39,702 — 39,702 — Commercial paper 21,215 — 21,215 — Corporate obligations 80,099 — 80,099 — Municipal bonds 45 — 45 — Promissory note 1,075 — 1,075 — U.S. treasury obligations 25,777 — 25,777 — U.S. agency obligations 35,763 — 35,763 — Group insurance contracts 6,193 — 6,193 — Derivatives – currency forward contracts 425 — 425 — Funds in investments and other assets: Israeli pension assets 14,166 — 14,166 — Derivatives – interest rate hedge – non-current 4,362 — 4,362 — Restricted cash – non-current 820 820 — — Total assets $ 289,580 $ 4,809 $ 284,771 $ — Liabilities: Derivatives – currency forward contracts $ 2,390 $ — $ 2,390 $ — Reported as follows: Assets: Cash and cash equivalents (1) $ 34,866 $ 3,872 $ 30,994 $ — Restricted cash 117 117 — — Short-term investments 228,631 — 228,631 — Other current assets 425 — 425 — Total current assets $ 264,039 $ 3,989 $ 260,050 $ — Long-term investments (2) $ 6,193 $ — $ 6,193 $ — Other long-term assets 18,528 — 18,528 — Restricted cash – non-current 820 820 — — Total long-term assets $ 25,541 $ 820 $ 24,721 $ — Liabilities: Other current liabilities $ 2,390 $ — $ 2,390 $ — (1) The cash and cash equivalent amounts presented in the table above do not include cash of $266,899 and non-negotiable (2) The long-term investments presented in the table above do not include the Company’s minority interest investment in a private company, which is accounted for under the cost method. Assets and liabilities of the Company are measured at fair value on a recurring basis as of December 31, 2016 and are summarized as follows: Fair Value Measurements at Reporting Date Using Description December 31, Quoted Prices in Significant Significant Assets: Cash equivalents: Money market funds $ 10,155 $ 10,155 $ — $ — Time deposits and certificates of deposit 4,900 — 4,900 — Bankers acceptance drafts 448 — 448 — Commercial paper 11,828 — 11,828 — Corporate obligations 2,025 — 2,025 — U.S. agency obligations 3,899 — 3,899 — Restricted cash – money market funds 5,287 5,287 — — Available-for-sale Time deposits and certificates of deposit ``` 23,818 — 23,818 — Bankers acceptance drafts 1,439 — 1,439 — Asset-backed securities 36,809 — 36,809 — Commercial paper 24,381 — 24,381 — Corporate obligations 46,707 — 46,707 — Municipal bonds 591 — 591 — Promissory note 675 — 675 — U.S. treasury obligations 25,414 — 25,414 — U.S. agency obligations 29,629 — 29,629 — Group insurance contracts 5,558 — 5,558 — Derivatives – currency forward contracts 2,985 — 2,985 — Funds in investments and other assets: Israeli pension assets 13,910 — 13,910 — Derivatives – interest rate hedge – non-current 4,900 — 4,900 — Restricted cash – non-current 573 573 — — Total assets $ 255,931 $ 16,015 $ 239,916 $ — Liabilities: Derivatives – currency forward contracts $ 543 $ — $ 543 $ — Total liabilities $ 543 $ — $ 543 $ — Assets: Cash and cash equivalents (1) $ 33,255 $ 10,155 $ 23,100 $ — Restricted cash 5,287 5,287 — — Short-term investments 189,463 — 189,463 — Other current assets 2,985 — 2,985 — Total current assets $ 230,990 $ 15,442 $ 215,548 $ — Long-term investments (2) $ 5,558 $ — $ 5,558 $ — Other long-term assets 18,810 — 18,810 — Restricted cash – non-current 573 573 — — Total long-term assets $ 24,941 $ 573 $ 24,368 $ — Liabilities: Other current liabilities $ 543 $ — $ 543 $ — (1) The cash and cash equivalent amounts presented in the table above do not include cash of $192,432 and non-negotiable (2) The long-term investments presented in the table above do not include the Company’s minority interest investment in a private company, which is accounted for under the cost method.

Derivatives (Tables)

Derivatives (Tables)	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Primary Net Hedging Positions and Corresponding Fair Values	$120,208, respectively. The following tables provide a summary of the primary net hedging positions and corresponding fair values held as of September 30, 2017 and December 31, 2016: September 30, 2017 Currency Hedged (Buy/Sell) Gross Notional Fair Value (1) U.S. Dollar/Japanese Yen $ 29,929 $ (1 ) U.S. Dollar/South Korean Won 24,663 (324 ) U.S. Dollar/Euro 14,979 (1,052 ) U.S. Dollar/U.K. Pound Sterling 5,272 (315 ) U.S. Dollar/Taiwan Dollar 11,374 (273 ) Total $ 86,217 $ (1,965 ) December 31, 2016 Currency Hedged (Buy/Sell) Gross Notional Fair Value (1) U.S. Dollar/Japanese Yen $ 30,522 $ 763 U.S. Dollar/South Korean Won 50,049 1,342 U.S. Dollar/Euro 18,040 156 U.S. Dollar/U.K. Pound Sterling 6,067 117 U.S. Dollar/Taiwan Dollar 15,530 64 Total $ 120,208 $ 2,442 (1) Represents the fair value of the net (liability) asset amount included in the consolidated balance sheet.
Summary of Fair Value Amounts of Company's Derivative Instruments	The following table provides a summary of the fair value amounts of the Company’s derivative instruments: Derivatives Designated as Hedging Instruments September 30, December 31, Derivative assets: Foreign exchange contracts (1) $ 425 $ 2,985 Interest rate hedge (2) 4,362 4,900 Derivative liabilities: Foreign exchange contracts (1) (2,390 ) (543 ) Total net derivative assets designated as hedging instruments $ 2,397 $ 7,342 (1) The derivative asset of $425 and $2,985 as of September 30, 2017 and December 31, 2016, respectively, related to foreign exchange contracts are classified in other current assets in the consolidated balance sheet. The derivative liability of $(2,390) and $(543) as of September 30, 2017 and December 31, 2016 are classified in other current liabilities in the consolidated balance sheet. 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. (2) The interest rate hedge assets of $4,362 and $4,900 as of September 30, 2017 and December 31, 2016, respectively, are classified in other assets in the consolidated balance sheet.
Summary of (Losses) Gains on Derivatives Designated as Cash Flow Hedging Instruments	The following table provides a summary of the (losses) gains on derivatives designated as cash flow hedging instruments: Three Months Ended Nine Months Ended Derivatives Designated as Cash Flow Hedging Instruments 2017 2016 2017 2016 Forward exchange contracts: Net (loss) gain recognized in OCI (1) $ (220 ) $ 326 $ (4,462 ) $ (3,107 ) Net (loss) gain reclassified from accumulated OCI into income (2) $ (1,360 ) $ (764 ) $ (1,842 ) $ 487 (1) Net change in the fair value of the effective portion classified in OCI. (2) Effective portion classified in cost of products for the three and nine months ended September 30, 2017 and 2016. The tax effect of the gains or losses reclassified from accumulated OCI into income is immaterial.
Summary of Losses on Derivatives Not Designated as Hedging Instruments	The following table provides a summary of the losses on derivatives not designated as hedging instruments: Three Months Ended Nine Months Ended Derivatives Not Designated as Hedging Instruments 2017 2016 2017 2016 Forward exchange contracts: Net loss recognized in income (1) $ (877 ) $ (339 ) $ (2,559 ) $ (1,283 ) (1) The Company enters into foreign exchange contracts to hedge against changes in the balance sheet for certain subsidiaries to mitigate the risk associated with certain foreign currency transactions in the ordinary course of business. These derivatives are not designated as hedging instruments and gains or losses from these derivatives are recorded immediately in selling, general and administrative expenses.

Inventories, net (Tables)

Inventories, net (Tables)	9 Months Ended
	Sep. 30, 2017
Inventory Disclosure [Abstract]
Summary of Inventories	Inventories consist of the following: September 30, December 31, Raw materials $ 177,677 $ 150,150 Work-in-process 54,909 39,105 Finished goods 86,874 86,614 $ 319,460 $ 275,869

Acquisitions and Dispositions (

Acquisitions and Dispositions (Tables) - Newport [Member]	9 Months Ended
	Sep. 30, 2017
Summary of Purchase Price	The purchase price of Newport consisted of the following: Cash paid for outstanding shares (1) $ 905,254 Settlement of share-based compensation awards (2) 8,824 Cash paid for Newport debt (3) 93,200 Total purchase price 1,007,278 Less: Cash and cash equivalents acquired (61,463 ) Total purchase price, net of cash and cash equivalents acquired $ 945,815 (1) Represents cash paid of $23.00 per share for approximately 39,359,000 shares of Newport common stock, without interest and subject to a deduction for any required withholding tax. (2) Represents the vested but not issued portion of Newport share-based compensation awards as of the acquisition date of April 29, 2016. (3) Represents the cash paid for the outstanding balance of Newport’s senior secured revolving credit agreement.
Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed	The following table summarizes the allocation of the purchase price to the fair values assigned to assets acquired and liabilities assumed at the date of the Newport Merger: Current assets (including cash) $ 186,137 Inventory 142,714 Intangible assets 404,506 Goodwill 396,027 Property, plant and equipment 119,932 Long-term assets 22,725 Total assets acquired 1,272,041 Current liabilities 95,156 Intangible liability 4,302 Other long-term liabilities 165,305 Total liabilities assumed 264,763 Fair value of assets acquired and liabilities assumed 1,007,278 Less: Cash and cash equivalents acquired (61,463 ) Total purchase price, net of cash and cash equivalents acquired $ 945,815
Allocation of Acquired Intangible Assets and Related Estimates of Useful Lives	The following table reflects the allocation of the acquired intangible assets and liabilities and related estimate of useful lives: Order backlog $ 12,100 1 year Customer relationships 247,793 6-18 Trademarks and trade names 55,900 Indefinite Developed technology 75,386 4-8 years In-process 6,899 Undefined (1) Leasehold interest (favorable) 6,428 4-5 Total intangible assets $ 404,506 Leasehold interest (unfavorable) $ 4,302 (1) The useful lives of in-process
Schedule of Unaudited Pro Forma Financial Information	The following unaudited pro-forma pro-forma pro-forma Three Months Ended Nine Months Ended 2016 2016 Total net revenues $ 380,660 $ 1,070,471 Net income 35,915 65,313 Net income per share: Basic $ 0.67 $ 1.22 Diluted $ 0.66 $ 1.21

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	The changes in the carrying amount of goodwill and accumulated impairment (loss) during the nine months ended September 30, 2017 and year ended December 31, 2016 were as follows: Nine Months Ended Twelve Months Ended Gross Accumulated Net Gross Accumulated Net Beginning balance at January 1 $ 727,999 $ (139,414 ) $ 588,585 $ 339,117 $ (139,414 ) $ 199,703 Acquired goodwill (1) — — — 396,027 — 396,027 Sale of business (2) (3,115 ) — (3,115 ) — — — Impairment loss (3) — (4,862 ) (4,862 ) — — — Foreign currency translation 8,491 — 8,491 (7,145 ) — (7,145 ) Ending balance at September 30, 2017 and December 31, 2016 $ 733,375 $ (144,276 ) $ 589,099 $ 727,999 $ (139,414 ) $ 588,585 (1) During 2016, the Company recorded $396,027 of goodwill related to the Newport Merger. (2) In 2017, the Company sold its Data Analytics business and, as a result, charged the related goodwill of $3,115 to the gain on sale of business. (3) In 2017, the Company recorded an impairment loss of $4,862 related to the write-off
Intangible Assets	Components of the Company’s intangible assets are comprised of the following: As of September 30, 2017: Gross Impairment (1) Accumulated Foreign Net Completed technology $ 176,586 $ (105 ) $ (114,095 ) $ 49 $ 62,435 Customer relationships 285,044 (1,406 ) (43,397 ) 832 241,073 Patents, trademarks, trade names and other 111,723 — (38,855 ) (42 ) 72,826 $ 573,353 $ (1,511 ) $ (196,347 ) $ 839 $ 376,334 (1) In 2017, the Company recorded impairment charges of $1,511 related to the write-off As of December 31, 2016: Gross Impairment Accumulated Foreign Net Completed technology (1) $ 176,586 $ — $ (97,707 ) $ (1,068 ) $ 77,811 Customer relationships (1) 285,044 — (29,709 ) (3,404 ) 251,931 Patents, trademarks, trade names and other (1) 111,723 — (33,397 ) (64 ) 78,262 $ 573,353 $ — $ (160,813 ) $ (4,536 ) $ 408,004 (1) During 2016, the Company recorded $404,506 of separately identified intangible assets related to the Newport Merger, of which $75,386 was completed technology, $247,793 was customer relationships and $81,327 was patents, trademarks, trade names, in-process
Estimated Net Amortization Expense	Aggregate net amortization expense related to acquired intangible assets and unfavorable lease commitments for future years is as follows: Year Amount 2017 (remaining) $ 10,767 2018 43,273 2019 40,160 2020 28,115 2021 20,302 2022 17,621 Thereafter 157,010

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Schedule of Short-Term Debt	September 30, December 31, Short-term debt: Japanese lines of credit $ 3,912 $ 4,245 Japanese receivables financing facility — 458 Other debt 108 8 Current portion of Term Loan Facility — 6,282 $ 4,020 $ 10,993 (1) Net of deferred financing fees, original issuance discount and re-pricing
Schedule of Long-Term Debt	September 30, December 31, Long-term debt: Austrian loans due through March 2020 $ 705 $ 548 Term Loan Facility, net (1) 435,026 600,681 $ 435,731 $ 601,229 (1) Net of deferred financing fees, original issuance discount and re-pricing
Schedule of Contractual Maturities of Debt Obligations	Contractual maturities of the Company’s debt obligations as of September 30, 2017 are as follows: Year Amount 2017 (remaining) $ 4,020 2018 13 2019 617 2020 75 2021 — 2022 — Thereafter 448,464

Product Warranties (Tables)

Product Warranties (Tables)	9 Months Ended
	Sep. 30, 2017
Guarantees and Product Warranties [Abstract]
Product Warranty Activities	Product warranty activities were as follows: Nine Months Ended 2017 2016 Beginning of period $ 8,261 $ 5,205 Assumed product warranty liability from Newport Merger — 3,040 Provision for product warranties 11,941 5,067 Direct and other charges to warranty liability (10,080 ) (5,170 ) End of period (1) $ 10,122 $ 8,142 (1) Short-term product warranty of $9,725 and long-term product warranty of $397 as of September 30, 2017, are included within other current liabilities and other liabilities, respectively, within the accompanying condensed consolidated balance sheet.

Net Income Per Share (Tables)

Net Income Per Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Reconciliation of Basic and Diluted Net Income Per Share	The following table sets forth the computation of basic and diluted net income per share: Three Months Ended Nine Months Ended 2017 2016 2017 2016 Numerator: Net income $ 75,994 $ 32,549 $ 261,494 $ 59,322 Denominator: Shares used in net income per common share – basic 54,282,000 53,574,000 54,076,000 53,423,000 Effect of dilutive securities: Restricted stock units, stock appreciation rights and shares issued under employee stock purchase plan 819,000 741,000 944,000 472,000 Shares used in net income per common share – diluted 55,101,000 54,315,000 55,020,000 53,895,000 Net income per common share: Basic $ 1.40 $ 0.61 $ 4.84 $ 1.11 Diluted $ 1.38 $ 0.60 $ 4.75 $ 1.10

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2017
Schedule of Total Stock-Based Compensation Expense Included in Company's Consolidated Statements of Income and Comprehensive Income	The total stock-based compensation expense included in the Company’s consolidated statements of income and comprehensive income was as follows: Three Months Ended Nine Months Ended 2017 2016 2017 2016 Cost of revenues $ 1,016 $ 666 $ 3,133 $ 1,996 Research and development expense 712 551 2,284 1,614 Selling, general and administrative expense 3,117 3,941 14,417 16,216 Total pre-tax $ 4,845 $ 5,158 $ 19,834 $ 19,826
Summary of Activity for RSUs	The following table presents the activity for RSUs under the Plan: Nine Months Ended Outstanding RSUs Weighted Average RSUs – beginning of period 1,325,516 $ 34.38 Accrued dividend shares 99 74.58 Granted 388,137 67.58 Vested (681,365 ) 34.53 Forfeited (71,783 ) 37.45 RSUs – end of period 960,604 $ 47.46
Summary of Activity for Outstanding and Exercisable SARs	At September 30, 2017 the Company’s outstanding and exercisable SARs, the weighted-average base value, the weighted average remaining contractual life and the aggregate intrinsic value thereof, were as follows: Number of Weighted Weighted Aggregate SARs outstanding 323,698 $ 28.58 3.4 $ 21,323 SARs exercisable 260,049 $ 27.95 3.1 $ 17,292
Stock Appreciation Rights (SARs) [Member]
Summary of Activity for Outstanding and Exercisable SARs	The following table presents the activity for SARs under the Plan: Nine Months Ended Outstanding SARs Weighted Average SARs – beginning of period 599,334 $ 28.10 Granted — — Exercised (258,854 ) 27.52 Forfeited or expired (16,782 ) 27.88 SARs Outstanding – end of period 323,698 $ 28.58

Business Segment, Geographic 36

Business Segment, Geographic Area, Product and Significant Customer Information (Tables)	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Net Revenues, Assets and Goodwill by Reportable Segment	The following table sets forth net revenues by reportable segment: Three Months Ended Nine Months Ended 2017 2016 2017 2016 Vacuum & Analysis $ 308,176 $ 229,167 $ 895,979 $ 620,207 Light & Motion 178,091 151,493 508,198 269,995 $ 486,267 $ 380,660 $ 1,404,177 $ 890,202 The following table sets forth segment assets by reportable segment: September 30, 2017: Vacuum & Light & Corporate, Total Segment assets: Accounts receivable $ 196,149 $ 108,223 $ (24,070 ) $ 280,302 Inventory, net 190,252 129,208 — 319,460 Total segment assets $ 386,401 $ 237,431 $ (24,070 ) $ 599,762 December 31, 2016: Vacuum & Light & Corporate, Total Segment assets: Accounts receivable $ 148,516 $ 121,516 $ (21,275 ) $ 248,757 Inventory, net 165,040 110,829 — 275,869 Total segment assets $ 313,556 $ 232,345 $ (21,275 ) $ 524,626 Goodwill associated with each of our reportable segments is as follows: September 30, December 31, Reportable segment: Vacuum & Analysis $ 196,885 $ 199,453 Light & Motion 392,214 389,132 Total goodwill $ 589,099 $ 588,585
Reconciliation of Segment Gross Profit to Consolidated Net Income	The following table sets forth a reconciliation of segment gross profit to consolidated net income: Three Months Ended Nine Months Ended 2017 2016 2017 2016 Gross profit by reportable segment: Vacuum & Analysis $ 141,438 $ 104,232 $ 410,228 $ 273,004 Light & Motion 86,557 64,153 242,897 109,207 Total gross profit by reportable segment 227,995 168,385 653,125 382,211 Operating expenses: Research and development 32,548 32,268 99,510 77,709 Selling, general and administrative 71,839 68,016 218,038 161,545 Acquisition and integration costs 2,466 2,641 4,698 25,190 Restructuring 10 — 2,596 24 Asset impairment — — 6,719 — Amortization of intangible assets 10,977 12,452 34,946 22,990 Income from operations 110,155 53,008 286,618 94,753 Gain on sale of business — — 74,856 — Interest and other (expense), net (8,784 ) (10,760 ) (24,846 ) (16,332 ) Income before income taxes 101,371 42,248 336,628 78,421 Provision for income taxes 25,377 9,699 75,134 19,099 Net income $ 75,994 $ 32,549 $ 261,494 $ 59,322
Schedule of Capital Expenditures, Depreciation and Amortization Expense of Intangible Assets by Reportable Segment	The following table sets forth capital expenditures by reportable segment for the three and nine months ended September 30, 2017 and 2016: Vacuum & Light & Total Three Months Ended September 30, 2017: Capital expenditures $ 4,212 $ 3,906 $ 8,118 Nine Months Ended September 30, 2017: Capital expenditures $ 10,114 $ 7,743 $ 17,857 Three Months Ended September 30, 2016: Capital expenditures $ 2,772 $ 1,923 $ 4,695 Nine Months Ended September 30, 2016: Capital expenditures $ 7,964 $ 3,995 $ 11,959 The following table sets forth depreciation and amortization by reportable segment for the three and nine months ended September 30, 2017 and 2016: Vacuum & Light & Total Three Months Ended September 30, 2017: Depreciation and amortization $ 5,058 $ 15,071 $ 20,129 Nine Months Ended September 30, 2017: Depreciation and amortization $ 15,277 $ 47,273 $ 62,550 Three Months Ended September 30, 2016: Depreciation and amortization $ 5,142 $ 16,907 $ 22,049 Nine Months Ended September 30, 2016: Depreciation and amortization $ 15,628 $ 28,129 $ 43,757
Reconciliation of Segment Assets to Consolidated Total Assets	The following table sets forth a reconciliation of segment assets to consolidated total assets: September 30, December 31, Total segment assets $ 599,762 $ 524,626 Cash and cash equivalents, restricted cash and investments 545,318 433,231 Other current assets 60,716 50,770 Property, plant and equipment, net 166,928 174,559 Goodwill and intangible assets, net 965,433 996,589 Other assets 32,188 32,467 Consolidated total assets $ 2,370,345 $ 2,212,242
Schedule of Net Revenues 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 Nine Months Ended 2017 2016 2017 2016 Net revenues: United States $ 237,592 $ 198,305 $ 700,291 $ 460,994 Korea 60,908 32,642 165,613 79,240 Japan 38,411 26,970 113,068 68,738 Asia (excluding Korea and Japan) 94,084 75,179 273,957 173,526 Europe 55,272 47,564 151,248 107,704 $ 486,267 $ 380,660 $ 1,404,177 $ 890,202 September 30, December 31, Long-lived assets: (1) United States $ 116,607 $ 122,547 Europe 28,516 28,717 Asia 48,091 49,406 $ 193,214 $ 200,670 (1) Long-lived assets include property, plant and equipment, net and certain other long-term assets, excluding long-term tax related accounts.
Worldwide Net Revenue for Each Group of Products	The following table sets forth worldwide net revenue for each group of products: Three Months Ended Nine Months Ended 2017 2016 2017 2016 Analytical and Control Solutions Products $ 33,068 $ 29,989 $ 97,689 $ 80,754 Materials Delivery Solutions Products 45,614 36,243 136,366 97,914 Power, Plasma and Reactive Gas Solutions Products 148,194 98,772 413,633 259,731 Pressure and Vacuum Measurement Products 81,300 64,163 248,291 181,808 Lasers Products 56,623 45,597 153,866 83,533 Optics Products 52,548 44,331 149,759 79,594 Photonics Products 68,920 61,565 204,573 106,868 $ 486,267 $ 380,660 $ 1,404,177 $ 890,202
Customers with Net Revenues Greater than 10% of Total Net Revenues	The Company had two customers with net revenues greater than 10% of total net revenues in the periods shown below: Three Months Ended Nine Months Ended 2017 2016 2017 2016 Applied Materials, Inc. 12 % 12 % 13 % 14 % LAM Research Corporation 11 % 9 % 12 % 11 %

Restructuring (Tables)

Restructuring (Tables)	9 Months Ended
	Sep. 30, 2017
Restructuring and Related Activities [Abstract]
Schedule of Company's Restructuring Activity	The activity related to the Company’s restructuring accrual is shown below: Nine Months Ended Balance at December 31, 2016 $ 540 Charged to expense 2,596 Payments and adjustment (608 ) Balance at September 30, 2017 $ 2,528

Investments - Investments Class

Investments - Investments Classified as Short-Term Available-for-Sale Investments (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale investments	$ 228,631	$ 189,463
Time Deposits and Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale investments	21,503	23,818
Bankers Acceptance Drafts [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale investments	3,452	1,439
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale investments	39,702	36,809
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale investments	21,215	24,381
Corporate Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale investments	80,099	46,707
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale investments	45	591
Promissory Note [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale investments	1,075	675
U.S. Treasury Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale investments	25,777	25,414
U.S. Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale investments	$ 35,763	$ 29,629

Investments - Investments Cla39

Investments - Investments Classified as Long-Term Available-for-Sale Investments and Long-Term Cost Method Investments (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities and Cost-method Investments [Line Items]
Investments classified as long-term	$ 10,593	$ 9,858
Available-for-Sale Investments [Member] | Group Insurance Contracts [Member]
Schedule of Available-for-sale Securities and Cost-method Investments [Line Items]
Investments classified as long-term	6,193	5,558
Cost-method Investments [Member] | Minority Interest in Private Company [Member]
Schedule of Available-for-sale Securities and Cost-method Investments [Line Items]
Investments classified as long-term	$ 4,400	$ 4,300

Investments - Investments Cla40

Investments - Investments Classified as Long-Term Available-for-Sale Investments and Long-Term Cost Method Investments (Parenthetical) (Detail) - Minority Interest in Private Company [Member] - USD ($) $ in Thousands	1 Months Ended		3 Months Ended	12 Months Ended
	Jul. 31, 2017	Apr. 30, 2016	Dec. 31, 2016	Dec. 31, 2016
Schedule of Cost-method Investments [Line Items]
Investments in minority interest	$ 100	$ 9,300
Impairment charges			$ 5,000	$ 5,000

Investments - Gross Unrealized

Investments - Gross Unrealized Gains and (Losses) Aggregated by Investment Category (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	$ 228,592	$ 189,538
Investments, Gross Unrealized Gains	137	35
Investments, Gross Unrealized (Losses)	(98)	(110)
Investments, Estimated Fair Value	228,631	189,463
Time Deposits and Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	21,501	23,818
Investments, Gross Unrealized Gains	2
Investments, Estimated Fair Value	21,503	23,818
Bankers Acceptance Drafts [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	3,452	1,439
Investments, Estimated Fair Value	3,452	1,439
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	39,709	36,847
Investments, Gross Unrealized Gains	17	6
Investments, Gross Unrealized (Losses)	(24)	(44)
Investments, Estimated Fair Value	39,702	36,809
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	21,278	24,423
Investments, Gross Unrealized (Losses)	(63)	(42)
Investments, Estimated Fair Value	21,215	24,381
Corporate Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	80,020	46,700
Investments, Gross Unrealized Gains	87	21
Investments, Gross Unrealized (Losses)	(8)	(14)
Investments, Estimated Fair Value	80,099	46,707
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	45	591
Investments, Estimated Fair Value	45	591
Promissory Note [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	1,075	675
Investments, Estimated Fair Value	1,075	675
U.S. Treasury Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	25,756	25,414
Investments, Gross Unrealized Gains	21
Investments, Estimated Fair Value	25,777	25,414
U.S. Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	35,756	29,631
Investments, Gross Unrealized Gains	10	8
Investments, Gross Unrealized (Losses)	(3)	(10)
Investments, Estimated Fair Value	35,763	29,629
Group Insurance Contracts [Member] | Long Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	6,193	6,276
Investments, Gross Unrealized (Losses)		(718)
Investments, Estimated Fair Value	$ 6,193	$ 5,558

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash	$ 117	$ 5,287
Available-for-sale investments	228,631	189,463
Short-term investments	228,631	189,463
Derivatives - contracts		2,985
Other long-term assets	32,188	32,467
Derivatives - liabilities		543
Interest Rate Hedge [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - contracts	4,362	4,900
Derivatives - interest rate hedge - non-current	4,362
Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash - non-current	820	573
Total assets	289,580	255,931
Total liabilities		543
Cash and cash equivalents	34,866	33,255
Restricted cash	117	5,287
Short-term investments	228,631	189,463
Derivatives - contracts	425	2,985
Total current assets	264,039	230,990
Available-for-sale investments	6,193	5,558
Other long-term assets	18,528	18,810
Restricted cash - non-current	820	573
Total long-term assets	25,541	24,941
Derivatives - liabilities	2,390	543
Fair Value Measurements, Recurring [Member] | Currency Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - contracts	425	2,985
Derivatives - liabilities	2,390	543
Fair Value Measurements, Recurring [Member] | Interest Rate Hedge [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - interest rate hedge - non-current	4,362	4,900
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	3,872	10,155
Restricted cash	117	5,287
Time Deposits 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		4,900
Available-for-sale investments	21,503	23,818
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	338	448
Available-for-sale investments	3,452	1,439
U.S. Agency Obligations [Member] | Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	6,595	3,899
Available-for-sale investments	35,763	29,629
Asset-Backed Securities [Member] | Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	39,702	36,809
U.S. Treasury Obligations [Member] | Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	25,777	25,414
Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member] | Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash - non-current	820	573
Total assets	4,809	16,015
Cash and cash equivalents	3,872	10,155
Restricted cash	117	5,287
Total current assets	3,989	15,442
Restricted cash - non-current	820	573
Total long-term assets	820	573
Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member] | 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	3,872	10,155
Restricted cash	117	5,287
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]
Total assets	284,771	239,916
Total liabilities		543
Cash and cash equivalents	30,994	23,100
Short-term investments	228,631	189,463
Derivatives - contracts	425	2,985
Total current assets	260,050	215,548
Available-for-sale investments	6,193	5,558
Other long-term assets	18,528	18,810
Total long-term assets	24,721	24,368
Derivatives - liabilities	2,390	543
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements, Recurring [Member] | Currency Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - contracts	425	2,985
Derivatives - liabilities	2,390	543
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements, Recurring [Member] | Interest Rate Hedge [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - interest rate hedge - non-current	4,362	4,900
Significant Other Observable Inputs (Level 2) [Member] | Time Deposits 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		4,900
Available-for-sale investments	21,503	23,818
Significant Other Observable Inputs (Level 2) [Member] | 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	338	448
Available-for-sale investments	3,452	1,439
Significant Other Observable Inputs (Level 2) [Member] | U.S. Agency Obligations [Member] | Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	6,595	3,899
Available-for-sale investments	35,763	29,629
Significant Other Observable Inputs (Level 2) [Member] | Asset-Backed Securities [Member] | Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	39,702	36,809
Significant Other Observable Inputs (Level 2) [Member] | U.S. Treasury Obligations [Member] | Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	25,777	25,414
Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	21,215	24,381
Commercial Paper [Member] | Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	21,792	11,828
Available-for-sale investments	21,215	24,381
Commercial Paper [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	21,792	11,828
Available-for-sale investments	21,215	24,381
Corporate Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	80,099	46,707
Corporate Obligations [Member] | Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	2,269	2,025
Available-for-sale investments	80,099	46,707
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]
Cash and cash equivalents	2,269	2,025
Available-for-sale investments	80,099	46,707
Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	45	591
Municipal Bonds [Member] | Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	45	591
Municipal Bonds [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 investments	45	591
Promissory Note [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	1,075	675
Promissory Note [Member] | Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	1,075	675
Promissory Note [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 investments	1,075	675
Group Insurance Contracts [Member] | Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	6,193	5,558
Group Insurance Contracts [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 investments	6,193	5,558
Israeli Pension Assets [Member] | Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash surrender value of life insurance	14,166	13,910
Israeli Pension 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]
Cash surrender value of life insurance	$ 14,166	$ 13,910

Fair Value Measurements - Sch43

Fair Value Measurements - Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis (Parenthetical) (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash/Non-negotiable time deposits - not subject to fair value disclosure requirements	$ 305,977	$ 228,623	$ 366,874	$ 227,574
Cash [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash/Non-negotiable time deposits - not subject to fair value disclosure requirements	266,899	192,432
Non-Negotiable Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash/Non-negotiable time deposits - not subject to fair value disclosure requirements	$ 4,212	$ 2,936

Derivatives - Additional Inform

Derivatives - Additional Information (Detail) - USD ($)	Sep. 30, 2016	Sep. 30, 2017	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Maximum period for hedging a portion of forecasted foreign currency denominated intercompany sales of inventory		18 months
Gross notional values of outstanding forward foreign exchange contracts		$ 86,217,000	$ 120,208,000
Accumulated other comprehensive income realization period		12 months
Interest Rate Hedge [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Percentage of debt which is subject to interest rate swap fixed rate	50.00%
Interest rate swap agreement, credit spread rate		2.25%
Interest rate swap agreement, maturity date	Sep. 30, 2020
Interest rate swap agreement, notional amount	$ 305,000,000
Interest rate swap agreement, interest rate description		The Company entered into an interest rate swap agreement to fix the rate on approximately 50% of its then outstanding balance of the Credit Agreement, as described further in Note 9. This hedge fixes the interest rate paid on the hedged debt at 1.198% per annum plus the applicable credit spread, which was 2.25% as of September 30, 2017, through September 30, 2020.
Interest rate swap agreement, fair value		$ 4,362,000
Cash Flow Hedging [Member] | Interest Rate Hedge [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate swap agreement, interest rate	1.198%

Derivatives - Summary of Primar

Derivatives - Summary of Primary Net Hedging Positions and Corresponding Fair Values (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	$ 86,217	$ 120,208
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	(1,965)	2,442
Forward Exchange Contracts [Member] | U.S. Dollar/Japanese Yen [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	29,929	30,522
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	(1)	763
Forward Exchange Contracts [Member] | U.S. Dollar/South Korean Won [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	24,663	50,049
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	(324)	1,342
Forward Exchange Contracts [Member] | U.S. Dollar/Euro [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	14,979	18,040
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	(1,052)	156
Forward Exchange Contracts [Member] | U.S. Dollar/U.K. Pound Sterling [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	5,272	6,067
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	(315)	117
Forward Exchange Contracts [Member] | U.S. Dollar/Taiwan Dollar [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	11,374	15,530
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	$ (273)	$ 64

Derivatives - Summary of Fair V

Derivatives - Summary of Fair Value Amounts of Company's Derivative Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Derivative assets		$ 2,985
Derivative liabilities		(543)
Total net derivative assets designated as hedging instruments	$ (1,965)	2,442
Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Total net derivative assets designated as hedging instruments	2,397	7,342
Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	425
Derivative liabilities	(2,390)
Foreign Exchange Contracts [Member] | Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	425	2,985
Derivative liabilities	(2,390)	(543)
Interest Rate Hedge [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	4,362	4,900
Interest Rate Hedge [Member] | Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	$ 4,362	$ 4,900

Derivatives - Summary of Fair47

Derivatives - Summary of Fair Value Amounts of Company's Derivative Instruments (Parenthetical) (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Derivative asset classified in other current assets		$ 2,985
Derivative liability classified in other current liabilities		(543)
Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative asset classified in other current assets	$ 425
Derivative liability classified in other current liabilities	(2,390)
Interest Rate Hedge [Member]
Derivatives, Fair Value [Line Items]
Derivative asset classified in other current assets	$ 4,362	$ 4,900

Derivatives - Summary of (Losse

Derivatives - Summary of (Losses) Gains on Derivatives Designated as Cash Flow Hedging Instruments (Detail) - Forward Exchange Contracts [Member] - Cash Flow Hedging [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Net (loss) gain recognized in OCI	$ (220)	$ 326	$ (4,462)	$ (3,107)
Net (loss) gain reclassified from accumulated OCI into income	$ (1,360)	$ (764)	$ (1,842)	$ 487

Derivatives - Summary of Losses

Derivatives - Summary of Losses on Derivatives Not Designated as Hedging Instruments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Forward Exchange Contracts [Member]
Derivative Instruments Gain Loss Not Designated As Hedging Instruments [Line Items]
Net loss recognized in income	$ (877)	$ (339)	$ (2,559)	$ (1,283)

Inventories - Summary of Invent

Inventories - Summary of Inventories (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Raw materials	$ 177,677	$ 150,150
Work-in-process	54,909	39,105
Finished goods	86,874	86,614
Inventories	$ 319,460	$ 275,869

Acquisitions and Dispositions -

Acquisitions and Dispositions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended			3 Months Ended			9 Months Ended		12 Months Ended
	Jul. 31, 2017	Apr. 30, 2017	Apr. 30, 2016	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Apr. 29, 2016
Business Acquisition [Line Items]
Business acquisition share price										$ 23
Stock-based compensation expense				$ 4,845		$ 5,158	$ 19,834	$ 19,826
Total proceeds from sale of business unit, net of cash sold		$ 72,509					72,509
Pre-tax gain		$ 74,856					74,856
Net revenues				486,267		380,660	1,404,177	890,202
Data Analytics Solutions Business [Member]
Business Acquisition [Line Items]
Net revenues									$ 12,700
Minority Interest in Private Company [Member]
Business Acquisition [Line Items]
Investments in minority interest	$ 100		$ 9,300
Impairment charges					$ 5,000				$ 5,000
Newport [Member]
Business Acquisition [Line Items]
Business acquisition share price										$ 23
Fair value write-up of acquired finished goods inventory				15,090			15,090
Incremental costs of sales charge						4,971		15,090
Fair value write-up of acquired property, plant and equipment				$ 36,242			$ 36,242
Compensation expense						6,631		6,631
Stock-based compensation expense						$ 3,334		$ 3,334

Acquisitions and Dispositions52

Acquisitions and Dispositions - Summary of Purchase Price (Detail) - USD ($) $ in Thousands	Apr. 29, 2016	Sep. 30, 2016
Business Acquisition [Line Items]
Total purchase price, net of cash and cash equivalents acquired		$ 939,591
Newport [Member]
Business Acquisition [Line Items]
Cash paid for outstanding shares	$ 905,254
Settlement of share-based compensation awards	8,824
Cash paid for Newport debt	93,200
Total purchase price	1,007,278
Less: Cash and cash equivalents acquired	(61,463)
Total purchase price, net of cash and cash equivalents acquired	$ 945,815

Acquisitions and Dispositions53

Acquisitions and Dispositions - Summary of Purchase Price (Parenthetical) (Detail)	Apr. 29, 2016$ / sharesshares
Business Combinations [Abstract]
Business acquisition share price | $ / shares	$ 23
Business acquisition number of shares acquired | shares	39,359,000

Acquisitions and Dispositions54

Acquisitions and Dispositions - Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Apr. 29, 2016	Sep. 30, 2016	Sep. 30, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Goodwill			$ 589,099	$ 588,585	$ 199,703
Total purchase price, net of cash and cash equivalents acquired		$ 939,591
Newport [Member]
Business Acquisition [Line Items]
Current assets (including cash)	$ 186,137
Inventory	142,714
Intangible assets	404,506
Goodwill	396,027			$ 396,027
Property, plant and equipment	119,932
Long-term assets	22,725
Total assets acquired	1,272,041
Current liabilities	95,156
Intangible liability	4,302
Other long-term liabilities	165,305
Total liabilities assumed	264,763
Fair value of assets acquired and liabilities assumed	1,007,278
Less: Cash and cash equivalents acquired	(61,463)
Total purchase price, net of cash and cash equivalents acquired	$ 945,815

Acquisitions and Dispositions55

Acquisitions and Dispositions - Allocation of Acquired Intangible Assets and Liabilities Related Estimates of Useful Lives (Detail) - USD ($) $ in Thousands	Apr. 29, 2016	Dec. 31, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 404,506
Newport [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price		$ 404,506
Order Backlog [Member] | Newport [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 12,100
Estimated useful life of finite-lived intangible assets	1 year
Customer Relationships [Member] | Newport [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 247,793	$ 247,793
Customer Relationships [Member] | Newport [Member] | Minimum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life of finite-lived intangible assets	6 years
Customer Relationships [Member] | Newport [Member] | Maximum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life of finite-lived intangible assets	18 years
Trademarks and Trade Names [Member] | Newport [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 55,900
Estimated useful life of finite-lived intangible assets	Indefinite
Developed Technology [Member] | Newport [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 75,386
Developed Technology [Member] | Newport [Member] | Minimum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life of finite-lived intangible assets	4 years
Developed Technology [Member] | Newport [Member] | Maximum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life of finite-lived intangible assets	8 years
In-process Research and Development [Member] | Newport [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 6,899
Estimated useful life of finite-lived intangible assets	Undefined
Leasehold Interest Favorable [Member] | Newport [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 6,428
Leasehold Interest Favorable [Member] | Newport [Member] | Minimum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life of finite-lived intangible assets	4 years
Leasehold Interest Favorable [Member] | Newport [Member] | Maximum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life of finite-lived intangible assets	5 years
Leasehold Interest Unfavorable [Member] | Newport [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 4,302

Acquisitions and Dispositions56

Acquisitions and Dispositions - Schedule of Unaudited Pro Forma Financial Information (Detail) - Newport [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016
Business Acquisition [Line Items]
Total net revenues	$ 380,660	$ 1,070,471
Net income	$ 35,915	$ 65,313
Net income per share:
Basic	$ 0.67	$ 1.22
Diluted	$ 0.66	$ 1.21

Goodwill and Intangible Asset57

Goodwill and Intangible Assets - Goodwill (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Beginning balance, Goodwill Gross Carrying Amount	$ 727,999	$ 339,117
Acquired goodwill, Gross Carrying Amount		396,027
Sale of business, Gross Carrying Amount	(3,115)
Foreign currency translation, Gross Carrying Amount	8,491	(7,145)
Ending balance, Goodwill Gross Carrying Amount	733,375	727,999
Beginning balance, Accumulated Impairment (Loss)	(139,414)	(139,414)
Acquired goodwill, Accumulated Impairment (Loss)	0	0
Impairment loss, Accumulated Impairment (Loss)	(4,862)
Foreign currency translation, Accumulated Impairment (Loss)	0	0
Ending balance, Accumulated Impairment (Loss)	(144,276)	(139,414)
Beginning balance, Goodwill Net	588,585	199,703
Acquired goodwill, Net		396,027
Sale of business, Net	(3,115)
Impairment loss, Net	(4,862)
Foreign currency translation, Net	8,491	(7,145)
Ending balance, Goodwill Net	$ 589,099	$ 588,585

Goodwill and Intangible Asset58

Goodwill and Intangible Assets - Goodwill (Parenthetical) (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Apr. 29, 2016	Dec. 31, 2015
Goodwill [Line Items]
Goodwill	$ 589,099	$ 588,585		$ 199,703
Goodwill related to the sale of business unit	3,115
Goodwill impairment loss	4,862
Data Analytics Solutions Business [Member]
Goodwill [Line Items]
Goodwill related to the sale of business unit	$ 3,115
Newport [Member]
Goodwill [Line Items]
Goodwill		$ 396,027	$ 396,027

Goodwill and Intangible Asset59

Goodwill and Intangible Assets - Intangible Assets (Detail) - USD ($) $ in Thousands	Apr. 29, 2016	Sep. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross		$ 573,353	$ 573,353
Impairment Charges		(1,511)
Accumulated Amortization		(196,347)	(160,813)
Foreign Currency Translation		839	(4,536)
Intangible assets, net		376,334	408,004
Acquired intangible assets	$ 404,506
Newport [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets			404,506
Completed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross		176,586	176,586
Impairment Charges		(105)
Accumulated Amortization		(114,095)	(97,707)
Foreign Currency Translation		49	(1,068)
Intangible assets, net		62,435	77,811
Completed Technology [Member] | Newport [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets			75,386
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross		285,044	285,044
Impairment Charges		(1,406)
Accumulated Amortization		(43,397)	(29,709)
Foreign Currency Translation		832	(3,404)
Intangible assets, net		241,073	251,931
Customer Relationships [Member] | Newport [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	$ 247,793		247,793
Patents, Trademarks, Trade Names and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross		111,723	111,723
Accumulated Amortization		(38,855)	(33,397)
Foreign Currency Translation		(42)	(64)
Intangible assets, net		$ 72,826	78,262
Patents, Trademarks, Trade Names and Other [Member] | Newport [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets			$ 81,327

Goodwill and Intangible Asset60

Goodwill and Intangible Assets - Intangible Assets (Parenthetical) (Detail) - USD ($) $ in Thousands	Apr. 29, 2016	Sep. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Impairment Charges		$ (1,511)
Acquired intangible assets	$ 404,506
Completed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment Charges		(105)
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment Charges		$ (1,406)
Newport [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets			$ 404,506
Unfavorable lease commitments			4,302
Newport [Member] | Completed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets			75,386
Newport [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	$ 247,793		247,793
Newport [Member] | Patents, Trademarks, Trade Names and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets			$ 81,327

Goodwill and Intangible Asset61

Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 10,977	$ 12,452	$ 34,946	$ 22,990	$ 22,990
Amortization income from unfavorable lease commitments			$ 588

Goodwill and Intangible Asset62

Goodwill and Intangible Assets - Estimated Net Amortization Expense (Detail) $ in Thousands	Sep. 30, 2017USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2017 (remaining)	$ 10,767
2,018	43,273
2,019	40,160
2,020	28,115
2,021	20,302
2,022	17,621
Thereafter	$ 157,010

Debt - Additional Information (

Debt - Additional Information (Detail)

Jul. 06, 2017

Dec. 14, 2016

Sep. 30, 2016USD ($)

Jun. 09, 2016USD ($)

Sep. 30, 2016USD ($)

Sep. 30, 2017USD ($)InstitutionSecurityLoan

Sep. 30, 2016USD ($)

Aug. 31, 2017USD ($)

Jul. 31, 2017USD ($)

Mar. 31, 2017USD ($)

Dec. 31, 2016USD ($)

Nov. 30, 2016USD ($)

Debt Instrument [Line Items]

Applicable margin for Term Loan Credit agreement

2.25%

Leverage ratio

125.00%

125.00%

LIBOR floor rate

0.75%

Decrease in base rate borrowings margin

1.25%

Description of applicable margin

The Re-pricing Amendment 3 decreased the applicable margin for the Company’s term loan under the Credit Agreement to 2.25% when the Total Leverage Ratio (as defined in the Credit Agreement) is at or above 1.25:1 and to 2.00% when the Total Leverage Ratio is below 1.25:1, both with a LIBOR floor of 0.75%. The margin for base rate borrowings will decrease to 1.25% when the Total Leverage Ratio is at or above 1.25:1 and to 1.00% when the Total Leverage Ratio is below 1.25:1.

Interest expense

$ 23,001,000

$ 20,526,000

Interest expense period

5 months

Interest Rate Hedge [Member]

Debt Instrument [Line Items]

Interest rate swap agreement, maturity date

Sep. 30, 2020

Interest rate swap agreement, notional amount

$ 305,000,000

$ 305,000,000

$ 305,000,000

Interest rate swap agreement, credit spread rate

2.25%

Austria [Member]

Debt Instrument [Line Items]

Number of outstanding loans | SecurityLoan

4

Interest on loans payable

Semi-annually

Japan [Member]

Debt Instrument [Line Items]

Borrowing capacity in the form of letters of credit

$ 20,444,000

Number of financial institutions for available lines of credit and borrowing arrangements | Institution

2

Aggregate borrowings expire and renewed

3 month intervals

Total borrowings outstanding

$ 0

$ 0

Minimum [Member] | Austria [Member]

Debt Instrument [Line Items]

Loan interest rate

0.75%

Maximum [Member] | Austria [Member]

Debt Instrument [Line Items]

Loan interest rate

2.00%

Revolving Lines of Credit [Member]

Debt Instrument [Line Items]

Borrowing capacity in the form of letters of credit

$ 11,111,000

Revolving Lines of Credit [Member] | Base Rate [Member]

Debt Instrument [Line Items]

Line of credit base interest rate

1.25%

Newport [Member] | Term Loan Credit Agreement [Member] | Secured Debt [Member]

Debt Instrument [Line Items]

Secured term loan, face amount

$ 780,000,000

Debt instrument, interest rate terms

Borrowings under the Term Loan Facility bear interest per annum at one of the following rates selected by the Company: (a) a base rate determined by reference to the highest of (1) the federal funds effective rate plus 0.50%, (2) the “prime rate” quoted in The Wall Street Journal, (3) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for an interest period of one month adjusted for certain additional costs, plus 1.00%, and (4) a floor of 1.75%, plus, in each case, an applicable margin (that was initially 3.00% and was decreased as described below); or (b) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for the interest period relevant to such borrowing adjusted for certain additional costs, subject to a LIBOR rate floor of 0.75%, plus an applicable margin (that was initially 4.00% and was decreased as described below). The Company has elected the interest rate as described in clause (b). The Term Loan Facility was issued with original issue discount of 1.00% of the principal amount thereof.

Debt instrument, issue discount percentage on principal

1.00%

Newport [Member] | Term Loan Credit Agreement [Member] | Secured Debt [Member] | Federal Funds Rate [Member]

Debt Instrument [Line Items]

Debt instrument, interest rate

0.50%

Newport [Member] | Term Loan Credit Agreement [Member] | Secured Debt [Member] | Adjusted One Month LIBOR [Member]

Debt Instrument [Line Items]

Debt instrument, interest rate

1.00%

Period of Libor measurement

1 month

Newport [Member] | Term Loan Credit Agreement [Member] | Secured Debt [Member] | Floor Rate [Member] | Minimum [Member]

Debt Instrument [Line Items]

Debt instrument, interest rate

1.75%

Newport [Member] | Term Loan Credit Agreement [Member] | Secured Debt [Member] | Floor Rate [Member] | Maximum [Member]

Debt Instrument [Line Items]

Debt instrument, interest rate

3.00%

Newport [Member] | Term Loan Credit Agreement [Member] | Secured Debt [Member] | LIBOR Floor Rate [Member] | Minimum [Member]

Debt Instrument [Line Items]

Debt instrument, interest rate

0.75%

Newport [Member] | Term Loan Credit Agreement [Member] | Secured Debt [Member] | LIBOR Floor Rate [Member] | Maximum [Member]

Debt Instrument [Line Items]

Debt instrument, interest rate

4.00%

Newport [Member] | Term Loan Credit Agreement [Member] | Secured Debt Repricing Amendment 1 [Member]

Debt Instrument [Line Items]

Debt instrument, interest rate

2.50%

Debt instrument, pre-payment premium percentage

1.00%

Debt instrument, pre-payment premium

$ 7,300,000

Debt instrument, prepaid principal amount

$ 50,000,000

Debt instrument, prepaid amount

60,000,000

Deferred finance fees, original issue discount and re-pricing fee, gross

$ 28,747,000

Deferred finance fees, original issue discount and re-pricing fee, net

13,438,000

Newport [Member] | Term Loan Credit Agreement [Member] | Secured Debt Repricing Amendment 1 [Member] | Interest Rate Hedge [Member]

Debt Instrument [Line Items]

Interest rate swap agreement, maturity date

Sep. 30, 2020

Interest rate swap agreement, notional amount

$ 335,000,000

$ 335,000,000

$ 305,000,000

$ 335,000,000

Interest rate swap agreement, interest rate

1.198%

1.198%

1.198%

Interest rate swap agreement, credit spread rate

2.25%

Newport [Member] | Term Loan Credit Agreement [Member] | Secured Debt Repricing Amendment 1 [Member] | Maximum [Member]

Debt Instrument [Line Items]

Debt instrument, quarterly payment percentage

0.25

Newport [Member] | Term Loan Credit Agreement [Member] | Secured Debt Repricing Amendment 1 [Member] | LIBOR [Member]

Debt Instrument [Line Items]

Debt instrument, interest rate

3.50%

Newport [Member] | Term Loan Credit Agreement [Member] | Secured Debt Repricing Amendment 2 [Member]

Debt Instrument [Line Items]

Secured term loan, face amount

$ 448,464,000

Debt instrument, prepaid principal amount

325,000,000

$ 75,000,000

$ 50,000,000

$ 50,000,000

$ 40,000,000

Debt instrument, scheduled principal payments

6,536,000

Newport [Member] | Term Loan Credit Agreement [Member] | Secured Debt Repricing Amendment 2 [Member] | LIBOR [Member]

Debt Instrument [Line Items]

Debt instrument, interest rate

2.75%

Newport [Member] | Term Loan Credit Agreement [Member] | Secured Debt Repricing Amendment 2 [Member] | Base Rate [Member]

Debt Instrument [Line Items]

Debt instrument, interest rate

1.75%

Newport [Member] | Asset Based Credit Agreement [Member]

Debt Instrument [Line Items]

Debt issuance cost capitalized

$ 1,201,000

Contractual term

5 years

Newport [Member] | Asset Based Credit Agreement [Member] | Secured Debt [Member]

Debt Instrument [Line Items]

Secured term loan, face amount

$ 50,000,000

Debt instrument, interest rate terms

Borrowings under the ABL Facility bear interest per annum at one of the following rates selected by the Company: (a) a base rate determined by reference to the highest of (1) the federal funds effective rate plus 0.50%, (2) the “prime rate” quoted in The Wall Street Journal, and (3) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for an interest period of one month adjusted for certain additional costs, plus 1.00%, plus, in each case, an initial applicable margin of 0.75%; and (b) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for the interest period relevant to such borrowing adjusted for certain additional costs, plus an initial applicable margin of 1.75%.

Percentage of borrowing based on eligible accounts

85.00%

Percentage of borrowing based on lower of cost or market value of certain eligible inventory

65.00%

Percentage of borrowing based on net orderly liquidation value of certain eligible inventory

85.00%

Percentage of borrowing base

30.00%

Initial commitment fee percentage

0.375%

Total commitment fee recognized in interest expense

$ 242,000

Newport [Member] | Asset Based Credit Agreement [Member] | Secured Debt [Member] | Maximum [Member]

Debt Instrument [Line Items]

Percentage of borrowing based on book value of certain eligible accounts

70.00%

Newport [Member] | Asset Based Credit Agreement [Member] | Secured Debt [Member] | Federal Funds Rate [Member]

Debt Instrument [Line Items]

Debt instrument, interest rate

0.50%

Newport [Member] | Asset Based Credit Agreement [Member] | Secured Debt [Member] | Adjusted One Month LIBOR [Member]

Debt Instrument [Line Items]

Debt instrument, interest rate

1.00%

Period of Libor measurement

1 month

Newport [Member] | Asset Based Credit Agreement [Member] | Secured Debt [Member] | LIBOR [Member]

Debt Instrument [Line Items]

Debt instrument, interest rate

1.75%

Newport [Member] | Asset Based Credit Agreement [Member] | Secured Debt [Member] | Initial Margin Rate [Member]

Debt Instrument [Line Items]

Debt instrument, interest rate

0.75%

Newport [Member] | Asset Based Credit Agreement [Member] | Letter of Credit [Member]

Debt Instrument [Line Items]

Borrowing capacity in the form of letters of credit

$ 15,000,000

Debt - Schedule of Short Term D

Debt - Schedule of Short Term Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Short-term Debt [Line Items]
Short term debt		$ 6,282
Short term debt	$ 4,020	10,993
Other Debt [Member]
Short-term Debt [Line Items]
Short term debt	108	8
Japan [Member] | Line of Credit [Member]
Short-term Debt [Line Items]
Short term debt	$ 3,912	4,245
Japan [Member] | Receivables Financing Facility [Member]
Short-term Debt [Line Items]
Short term debt		$ 458

Debt - Schedule of Long Term De

Debt - Schedule of Long Term Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Long term debt	$ 435,731	$ 601,229
Term Loan Facility, Net [Member]
Debt Instrument [Line Items]
Long term debt	435,026	600,681
Australia [Member] | Loans Due Through March 2020 [Member]
Debt Instrument [Line Items]
Long term debt	$ 705	$ 548

Debt - Schedule of Long Term 66

Debt - Schedule of Long Term Debt (Parenthetical) (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Term Loan Facility, Net [Member]
Debt Instrument [Line Items]
Deferred financing fees, original issuance discount and re-pricing fee	$ 13,438	$ 19,642

Debt - Schedule of Contractual

Debt - Schedule of Contractual Maturities of Debt Obligations (Detail) $ in Thousands	Sep. 30, 2017USD ($)
Maturities of Long-term Debt [Abstract]
2017 (remaining)	$ 4,020
2,018	13
2,019	617
2,020	75
2,021	0
2,022	0
Thereafter	$ 448,464

Product Warranties - Product Wa

Product Warranties - Product Warranty Activities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Guarantees [Abstract]
Beginning of period	$ 8,261	$ 5,205
Assumed product warranty liability from Newport Merger		3,040
Provision for product warranties	11,941	5,067
Direct and other charges to warranty liability	(10,080)	(5,170)
End of period	$ 10,122	$ 8,142

Product Warranties - Product 69

Product Warranties - Product Warranty Activities (Parenthetical) (Detail) $ in Thousands	Sep. 30, 2017USD ($)
Guarantees [Abstract]
Short-term product warranty	$ 9,725
Long-term product warranty	$ 397

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Income Taxes [Line Items]
Effective tax rate	25.00%	23.00%	22.30%	24.40%
Gross unrecognized tax benefits excluding interest and penalties	$ 26,571		$ 26,571		$ 25,465
Net unrecognized tax benefit excluding interest and penalties that would impact effective tax rate	18,091		18,091
Accrued interest on unrecognized tax benefits	$ 367		367		$ 491
Net unrecognized tax benefits, excluding interest and penalties, related to foreign tax positions			$ 1,733
Income tax examination, description			The Company and its subsidiaries are subject to examination by U.S. federal, state and foreign tax authorities. The Internal Revenue Service commenced an examination of the Company’s U.S. federal tax filing for the 2015 tax year during the quarter ended September 30, 2017. The U.S. statute of limitations remains open for tax years 2014 through present. The statute of limitations for the Company’s tax filings in other jurisdictions varies between fiscal years 2012 through present. We also have certain federal credit carry-forwards and state tax loss and credit carry-forwards that are open to examination for tax years 2000 through the present.
Earliest Tax Year [Member]
Income Taxes [Line Items]
Open tax year			2,014

Pension Plans - Additional Info

Pension Plans - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Net periodic benefit costs	$ 254	$ 673	$ 761	$ 1,126
Company's contributions	$ 113		$ 453

Net Income Per Share - Reconcil

Net Income Per Share - Reconciliation of Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Numerator:
Net income	$ 75,994	$ 32,549	$ 261,494	$ 59,322
Denominator:
Shares used in net income per common share - basic	54,282,000	53,574,000	54,076,000	53,423,000
Effect of dilutive securities:
Restricted stock units, stock appreciation rights and shares issued under employee stock purchase plan	819,000	741,000	944,000	472,000
Shares used in net income per common share - diluted	55,101,000	54,315,000	55,020,000	53,895,000
Net income per common share:
Basic	$ 1.40	$ 0.61	$ 4.84	$ 1.11
Diluted	$ 1.38	$ 0.60	$ 4.75	$ 1.10

Net Income Per Share - Addition

Net Income Per Share - Additional Information (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Restricted Stock Units (RSUs) [Member]
Earnings Per Share [Line Items]
Number of shares excluded from computation of diluted earnings per share	200	0	300	500

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($)	Oct. 30, 2017	Jul. 25, 2011	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2017	Sep. 30, 2016
Stockholders Equity [Line Items]
Common stock, value of shares authorized to repurchase		$ 200,000,000
Stock repurchase, shares		1,770,000							0	45,000
Value of shares repurchased		$ 52,000,000								$ 1,545,000
Average price of repurchased shares										$ 34.50
Cash dividends per common share			$ 0.175	$ 0.175	$ 0.175	$ 0.170	$ 0.170	$ 0.170	$ 0.525	$ 0.510
Dividend payment to common shareholders			$ 28,403,000	$ 28,403,000	$ 28,403,000	$ 27,249,000	$ 27,249,000	$ 27,249,000	$ 28,403,000	$ 27,249,000
Subsequent Event [Member]
Stockholders Equity [Line Items]
Dividend declared date	Oct. 30, 2017
Cash dividend to be paid	$ 0.18
Dividend to be paid date	Dec. 8, 2017
Dividend declared, shareholders of record date	Nov. 27, 2017

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Apr. 29, 2016	May 31, 2017	May 31, 2016	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance				18,000,000
Total compensation expense related to unvested stock-based awards granted to employees, officers and directors				$ 25,051
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued as per merger agreement				1,260,525
Number of RSUs outstanding				12,233
Dividend reinvestment				286
Restricted stock units, granted				388,137
Restricted stock units, weighted average grant date fair value				$ 67.58
Restricted Stock Units (RSUs) [Member] | Newport Deferred Compensation [Member] | Outside Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Newport RSUs converted to MKS RSUs at Merger date	36,599
Newport RSUs converted to MKS RSUs at Merger date and released		5,515	19,137
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units, granted				0
Restricted stock units, weighted average grant date fair value				$ 0
Newport [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued as per merger agreement	360,674
Newport [Member] | Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued as per merger agreement	899,851

Stock-Based Compensation - Sche

Stock-Based Compensation - Schedule of Total Stock-Based Compensation Expense Included in Company's Consolidated Statements of Income and Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total pre-tax stock-based compensation expense	$ 4,845	$ 5,158	$ 19,834	$ 19,826
Cost of Revenues [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total pre-tax stock-based compensation expense	1,016	666	3,133	1,996
Research and Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total pre-tax stock-based compensation expense	712	551	2,284	1,614
Selling, General and Administrative Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total pre-tax stock-based compensation expense	$ 3,117	$ 3,941	$ 14,417	$ 16,216

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Activity for RSUs (Detail)	9 Months Ended
	Sep. 30, 2017$ / sharesshares
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs/SARs - beginning of period | shares	1,325,516
Granted | shares	388,137
Vested | shares	(681,365)
Forfeited | shares	(71,783)
RSUs/SARs - end of period | shares	960,604
RSUs/SARs, Weighted Average Grant Date Fair Value, Beginning of period | $ / shares	$ 34.38
Weighted Average Grant Date Fair Value, Granted | $ / shares	67.58
Weighted Average Grant Date Fair Value, Vested | $ / shares	34.53
Weighted Average Grant Date Fair Value, Forfeited | $ / shares	37.45
RSUs/SARs, Weighted Average Grant Date Fair Value, end of period | $ / shares	$ 47.46
Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accrued dividend shares | shares	99
Weighted Average Grant Date Fair Value, Accrued dividend shares | $ / shares	$ 74.58

Stock-Based Compensation - Su78

Stock-Based Compensation - Summary of Activity for SARs (Detail) - Stock Appreciation Rights (SARs) [Member]	9 Months Ended
	Sep. 30, 2017$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs/SARs - beginning of period | shares	599,334
Granted, Outstanding SARs | shares	0
Exercised, Outstanding SARs | shares	(258,854)
Forfeited or expired, Outstanding SARs | shares	(16,782)
RSUs/SARs - end of period | shares	323,698
RSUs/SARs, Weighted Average Grant Date Fair Value, Beginning of period | $ / shares	$ 28.10
Granted, Weighted Average Grant Date Fair Value | $ / shares	0
Exercised, Weighted Average Grant Date Fair Value | $ / shares	27.52
Forfeited or expired, Weighted Average Grant Date Fair Value | $ / shares	27.88
RSUs/SARs, Weighted Average Grant Date Fair Value, end of period | $ / shares	$ 28.58

Stock-Based Compensation - Su79

Stock-Based Compensation - Summary of Activity for Outstanding and Exercisable SARs (Detail) - Stock Appreciation Rights (SARs) [Member] - USD ($)	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
SARs outstanding	323,698	599,334
SARs exercisable	260,049
Weighted Average Base Value, SARs outstanding	$ 28.58
Weighted Average Base Value, SARs exercisable	$ 27.95
Weighted Average Remaining Contractual Life, SARs outstanding	3 years 4 months 24 days
Weighted Average Remaining Contractual Life, SARs exercisable	3 years 1 month 6 days
Aggregate Intrinsic Value, SARs outstanding	$ 21,323
Aggregate Intrinsic Value, SARs exercisable	$ 17,292

Business Segment, Geographic 80

Business Segment, Geographic Area, Product and Significant Customer Information - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2017SegmentCustomerProduct
Segment Reporting [Abstract]
Number of reportable segments | Segment	2
Number of product groups | Product	7
Number of customers with net revenues greater than 10% of total net revenues | Customer	2
Entity wide net revenue major customer percentage minimum	10.00%

Business Segment, Geographic 81

Business Segment, Geographic Area, Product and Significant Customer Information - Net Revenues by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Total net revenues	$ 486,267	$ 380,660	$ 1,404,177	$ 890,202
Vacuum & Analysis [Member]
Segment Reporting Information [Line Items]
Total net revenues	308,176	229,167	895,979	620,207
Light & Motion [Member]
Segment Reporting Information [Line Items]
Total net revenues	$ 178,091	$ 151,493	$ 508,198	$ 269,995

Business Segment, Geographic 82

Business Segment, Geographic Area, Product and Significant Customer Information - Reconciliation of Segment Gross Profit to Consolidated Net Income (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Apr. 30, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Gross profit		$ 227,995	$ 168,385	$ 653,125	$ 382,211
Research and development		32,548	32,268	99,510	77,709
Selling, general and administrative		71,839	68,016	218,038	161,545
Acquisition and integration costs		2,466	2,641	4,698	25,190
Restructuring		10		2,596	24
Asset impairment				6,719
Amortization of intangible assets		10,977	12,452	34,946	22,990	$ 22,990
Income from operations		110,155	53,008	286,618	94,753
Gain on sale of business	$ 74,856			74,856
Interest and other (expense), net		(8,784)	(10,760)	(24,846)	(16,332)
Income before income taxes		101,371	42,248	336,628	78,421
Provision for income taxes		25,377	9,699	75,134	19,099
Net income		75,994	32,549	261,494	59,322
Vacuum & Analysis [Member]
Segment Reporting Information [Line Items]
Gross profit		141,438	104,232	410,228	273,004
Light & Motion [Member]
Segment Reporting Information [Line Items]
Gross profit		$ 86,557	$ 64,153	$ 242,897	$ 109,207

Business Segment, Geographic 83

Business Segment, Geographic Area, Product and Significant Customer Information - Schedule of Capital Expenditures, Depreciation and Amortization Expense of Intangible Assets by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Capital expenditures	$ 8,118	$ 4,695	$ 17,857	$ 11,959
Depreciation and amortization	20,129	22,049	62,550	43,757
Vacuum & Analysis [Member]
Segment Reporting Information [Line Items]
Capital expenditures	4,212	2,772	10,114	7,964
Depreciation and amortization	5,058	5,142	15,277	15,628
Light & Motion [Member]
Segment Reporting Information [Line Items]
Capital expenditures	3,906	1,923	7,743	3,995
Depreciation and amortization	$ 15,071	$ 16,907	$ 47,273	$ 28,129

Business Segment, Geographic 84

Business Segment, Geographic Area, Product and Significant Customer Information - Segment Assets by Reportable Segment (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Accounts receivable	$ 280,302	$ 248,757
Inventory, net	319,460	275,869
Total assets	2,370,345	2,212,242
Operating Segments [Member]
Segment Reporting Information [Line Items]
Accounts receivable	280,302	248,757
Inventory, net	319,460	275,869
Total assets	599,762	524,626
Operating Segments [Member] | Vacuum & Analysis [Member]
Segment Reporting Information [Line Items]
Accounts receivable	196,149	148,516
Inventory, net	190,252	165,040
Total assets	386,401	313,556
Operating Segments [Member] | Light & Motion [Member]
Segment Reporting Information [Line Items]
Accounts receivable	108,223	121,516
Inventory, net	129,208	110,829
Total assets	237,431	232,345
Corporate, Eliminations & Other [Member]
Segment Reporting Information [Line Items]
Accounts receivable	(24,070)	(21,275)
Total assets	$ (24,070)	$ (21,275)

Business Segment, Geographic 85

Business Segment, Geographic Area, Product and Significant Customer Information - Reconciliation of Segment Assets to Consolidated Total Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Segment Reporting, Asset Reconciling Item [Line Items]
Consolidated total assets	$ 2,370,345	$ 2,212,242
Other current assets	60,716	50,770
Property, plant and equipment, net	166,928	174,559
Other assets	32,188	32,467
Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Consolidated total assets	599,762	524,626
Segment Reconciling Items [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents, restricted cash and investments	545,318	433,231
Other current assets	60,716	50,770
Property, plant and equipment, net	166,928	174,559
Goodwill and intangible assets, net	965,433	996,589
Other assets	$ 32,188	$ 32,467

Business Segment, Geographic 86

Business Segment, Geographic Area, Product and Significant Customer Information - Schedule of Net Revenues and Long-Lived Assets by Geographic Regions (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 486,267	$ 380,660	$ 1,404,177	$ 890,202
Long-lived assets	193,214		193,214		$ 200,670
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	237,592	198,305	700,291	460,994
Long-lived assets	116,607		116,607		122,547
Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	60,908	32,642	165,613	79,240
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	38,411	26,970	113,068	68,738
Asia (Excluding Korea and Japan) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	94,084	75,179	273,957	173,526
Long-lived assets	48,091		48,091		49,406
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	55,272	$ 47,564	151,248	$ 107,704
Long-lived assets	$ 28,516		$ 28,516		$ 28,717

Business Segment, Geographic 87

Business Segment, Geographic Area, Product and Significant Customer Information - Summary of Goodwill Associated with Reportable Segments (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Goodwill	$ 589,099	$ 588,585	$ 199,703
Vacuum & Analysis [Member]
Segment Reporting Information [Line Items]
Goodwill	196,885	199,453
Light & Motion [Member]
Segment Reporting Information [Line Items]
Goodwill	$ 392,214	$ 389,132

Business Segment, Geographic 88

Business Segment, Geographic Area, Product and Significant Customer Information - Worldwide Net Revenue for Each Group of Products (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenue from External Customer [Line Items]
Net sales from product groups	$ 486,267	$ 380,660	$ 1,404,177	$ 890,202
Analytical and Control Solutions Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	33,068	29,989	97,689	80,754
Materials Delivery Solutions Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	45,614	36,243	136,366	97,914
Power Plasma and Reactive Gas Solutions Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	148,194	98,772	413,633	259,731
Pressure and Vacuum Measurement Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	81,300	64,163	248,291	181,808
Lasers Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	56,623	45,597	153,866	83,533
Optics Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	52,548	44,331	149,759	79,594
Photonics Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	$ 68,920	$ 61,565	$ 204,573	$ 106,868

Business Segment, Geographic 89

Business Segment, Geographic Area, Product and Significant Customer Information - Customers with Net Revenues Greater than 10% of Total Net Revenues (Detail) - Customer Concentration Risk [Member] - Sales Revenue, Net [Member]	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Applied Materials, Inc [Member]
Revenue, Major Customer [Line Items]
Percentage of total net revenues	12.00%	12.00%	13.00%	14.00%
LAM Research Corporation [Member]
Revenue, Major Customer [Line Items]
Percentage of total net revenues	11.00%	9.00%	12.00%	11.00%

Restructuring - Additional Info

Restructuring - Additional Information (Detail) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017USD ($)	Sep. 30, 2017USD ($)FacilitiesOfficePlant	Sep. 30, 2016USD ($)
Restructuring and Related Activities [Abstract]
Restructuring charges | $	$ 10	$ 2,596	$ 24
Number of facilities consolidated | Facilities		1
Number of manufacturing plants | Plant		2
Number of sales offices | Office		2

Restructurings - Schedule of Co

Restructurings - Schedule of Company's Restructuring Activity (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016
Restructuring and Related Activities [Abstract]
Balance at December 31, 2016		$ 540
Charged to expense	$ 10	2,596	$ 24
Payments and adjustment		(608)
Balance at September 30, 2017	$ 2,528	$ 2,528