10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 10-Q

(MARK ONE)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2019

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                      to                     

Commission file number 0-23621

MKS INSTRUMENTS, INC.

(Exact name of registrant as specified in its charter)

Massachusetts	04-2277512
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
2 Tech Drive, Suite 201, Andover, Massachusetts	01810
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code (978) 645-5500

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  ☒    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act:

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ☐    No  ☒

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, no par value	MKSI	Nasdaq Global Select Market

As of May 1, 2019, the registrant had 54,357,260 shares of common stock outstanding.

MKS INSTRUMENTS, INC.

FORM 10-Q

INDEX

PART I. FINANCIAL INFORMATION
	ITEM 1.	FINANCIAL STATEMENTS (Unaudited).
		Condensed Consolidated Balance Sheets – March 31, 2019 and December 31, 2018	3
		Condensed Consolidated Statements of Operations and Comprehensive Income – Three months ended March 31, 2019 and 2018	4
		Consolidated Statements of Stockholders’ Equity – Three months ended March 31, 2019 and 2018	5
		Condensed Consolidated Statements of Cash Flows – Three months ended March 31, 2019 and 2018	6
		Notes to Unaudited Condensed Consolidated Financial Statements	7
	ITEM 2.	MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS.	35
	ITEM 3.	QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.	45
	ITEM 4.	CONTROLS AND PROCEDURES.	46
PART II. OTHER INFORMATION
	ITEM 1.	LEGAL PROCEEDINGS.	46
	ITEM 1A.	RISK FACTORS.	47
	ITEM 6.	EXHIBITS.	48
SIGNATURES			50

2

PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS.

MKS INSTRUMENTS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except share and per share data)

(Unaudited)

	March 31, 2019			December 31, 2018
ASSETS
Current assets:
Cash and cash equivalents	$	418,016		$	644,345
Short-term investments		44,326			73,826
Trade accounts receivable, net of allowance for doubtful accounts of $4,968 and $5,243 at March 31, 2019 and December 31, 2018, respectively		335,990			295,454
Inventories		475,633			384,689
Other current assets		86,387			65,790
Total current assets		1,360,352			1,464,104
Property, plant and equipment, net		251,424			194,367
Right-of-use asset		65,628			—
Goodwill		1,057,331			586,996
Intangible assets, net		619,091			319,807
Long-term investments		10,350			10,290
Other assets		48,562			38,682
Total assets	$	3,412,738		$	2,614,246
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Short-term debt	$	10,281		$	3,986
Accounts payable		95,317			83,825
Accrued compensation		61,523			82,350
Income taxes payable		14,355			16,358
Lease liability		19,459			—
Deferred revenue and customer advances		21,056			14,246
Other current liabilities		74,568			62,520
Total current liabilities		296,559			263,285
Long-term debt, net		976,823			343,842
Non-current deferred taxes		78,904			48,223
Non-current accrued compensation		60,337			55,598
Non-current lease liability		49,392			—
Other liabilities		29,862			30,111
Total liabilities		1,491,877			741,059
Commitments and contingencies (Note 19)
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; 54,231,772 and 54,039,554 shares issued and outstanding at March 31, 2019 and December 31, 2018, respectively		113			113
Additional paid-in capital		844,261			793,932
Retained earnings		1,086,409			1,084,797
Accumulated other comprehensive loss		(9,922	)		(5,655	)
Total stockholders’ equity		1,920,861			1,873,187
Total liabilities and stockholders’ equity	$	3,412,738		$	2,614,246

The accompanying notes are an integral part of the unaudited condensed consolidated financial statements.

3

MKS INSTRUMENTS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

AND COMPREHENSIVE INCOME

(in thousands, except per share data)

(Unaudited)

	Three Months Ended March 31,
	2019			2018
Net revenues:
Products	$	397,363		$	496,677
Services		66,198			57,598
Total net revenues		463,561			554,275
Cost of revenues:
Cost of products		229,710			261,321
Cost of services		35,733			30,099
Total cost of revenues (exclusive of amortization shown separately below)		265,443			291,420
Gross profit		198,118			262,855
Research and development		38,933			34,857
Selling, general and administrative		82,455			82,949
Fees and expenses related to incremental term loan		5,847			—
Acquisition and integration costs		30,167			—
Restructuring		223			1,220
Customer contract obligation		1,700			—
Environmental costs		—			1,000
Amortization of intangible assets		15,727			11,190
Income from operations		23,066			131,639
Interest income		1,714			1,105
Interest expense		9,119			5,430
Other expense, net		325			572
Income before income taxes		15,336			126,742
Provision for income taxes		2,881			21,621
Net income	$	12,455		$	105,121
Other comprehensive income:
Changes in value of financial instruments designated as cash flow hedges, net of tax expense (benefit)(1)	$	52		$	178
Foreign currency translation adjustments, net of tax of $0		(4,268	)		10,771
Unrecognized pension loss, net of tax benefit(2)		(1	)		(85	)
Unrealized loss on investments, net of tax benefit(3)		(50	)		(59	)
Total comprehensive income	$	8,188		$	115,926
Net income per share:
Basic	$	0.23		$	1.93
Diluted	$	0.23		$	1.90
Weighted average common shares outstanding:
Basic		54,147			54,423
Diluted		54,848			55,286

⁽¹⁾ Tax expense (benefit) was $15 and ($112) for the three months ended March 31, 2019 and 2018, respectively.

⁽²⁾ Tax benefit was $21 and $36 for the three months ended March 31, 2019 and 2018, respectively.

⁽³⁾ Tax benefit was $16 and $17 for the three months ended March 31, 2019 and 2018, respectively.

The accompanying notes are an integral part of the unaudited condensed consolidated financial statements.

4

MKS INSTRUMENTS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(in thousands, except per share data)

(Unaudited)

	Common Stock				Additional Paid-In Capital		Retained Earnings			Accumulated Other Comprehensive Income/(Loss)			Total Stockholders’ Equity
	Shares		Amount
Balance at December 31, 2018		54,039,554	$	113	$	793,932	$	1,084,797		$	(5,655	)	$	1,873,187
Net issuance under stock-based plans		192,218				22,491								22,491
Stock-based compensation						27,838								27,838
Cash dividend ($0.20 per common share)								(10,843	)					(10,843	)
Comprehensive income (net of tax):
Net income								12,455						12,455
Other comprehensive loss											(4,267	)		(4,267	)
Balance at March 31, 2019		54,231,772	$	113	$	844,261	$	1,086,409		$	(9,922	)	$	1,920,861

	Common Stock				Additional Paid-In Capital			Retained Earnings			Accumulated Other Comprehensive Income/(Loss)		Total Stockholders’ Equity
	Shares		Amount
Balance at December 31, 2017		54,355,535	$	113	$	789,644		$	795,698		$	3,452	$	1,588,907
Net issuance under stock-based plans		136,568				(8,920	)							(8,920	)
Stock-based compensation						10,426								10,426
Cash dividend ($0.18 per common share)									(9,808	)				(9,808	)
Accounting Standards Codification Topic 606 Adjustment									1,809					1,809
Comprehensive income (net of tax):
Net income									105,121					105,121
Other comprehensive gain												10,805		10,805
Balance at March 31, 2018		54,492,103	$	113	$	791,150		$	892,820		$	14,257	$	1,698,340

The accompanying notes are an integral part of the unaudited condensed consolidated financial statements.

5

MKS INSTRUMENTS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(Unaudited)

	Three Months Ended March 31,
	2019			2018
Cash flows provided by operating activities:
Net income	$	12,455		$	105,121
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		25,211			20,492
Amortization of inventory step-up adjustment to fair value		5,140			—
Amortization of debt issuance costs, original issue discount, and soft call premium		1,202			2,019
Stock-based compensation		27,838			10,426
Provision for excess and obsolete inventory		5,063			5,333
(Recovery) provision for doubtful accounts		(440	)		335
Deferred income taxes		(2,445	)		(705	)
Other		66			34
Changes in operating assets and liabilities, net of business acquired:
Trade accounts receivable		4,028			(37,336	)
Inventories		(10,327	)		(28,177	)
Income taxes		(3,653	)		8,822
Other current and non-current assets		4,804			(942	)
Accrued compensation		(22,957	)		(32,531	)
Other current and non-current liabilities		359			10,544
Accounts payable		(17,294	)		9,321
Net cash provided by operating activities		29,050			72,756
Cash flows used in investing activities:
Acquisition of business, net of cash acquired		(988,599	)		—
Purchases of investments		(44,212	)		(49,753	)
Maturities of investments		18,684			49,596
Sales of investments		154,489			8,930
Proceeds from sale of assets		35			—
Purchases of property, plant and equipment		(14,529	)		(9,390	)
Net cash used in investing activities		(874,132	)		(617	)
Cash flows provided by (used in) financing activities:
Net proceeds from short and long-term borrowings		638,638			11,907
Payments on short-term borrowings		(176	)		(10,274	)
Payments on long-term borrowings		—			(50,000	)
Net payments related to employee stock awards		(8,987	)		(8,921	)
Dividend payments to common stockholders		(10,843	)		(9,808	)
Net cash provided by (used in) financing activities		618,632			(67,096	)
Effect of exchange rate changes on cash and cash equivalents		121			1,958
(Decrease) Increase in cash and cash equivalents and restricted cash		(226,329	)		7,001
Cash and cash equivalents at beginning of period		644,345			333,887
Cash and cash equivalents at end of period	$	418,016		$	340,888

The accompanying notes are an integral part of the unaudited condensed consolidated financial statements.

6

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

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 March 31, 2019, and for the three months ended March 31, 2019 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, 2018 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 and do not include all of the information and note disclosures required by United States generally accepted accounting principles (“U.S. GAAP”). The unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the MKS Annual Report on Form 10-K for the year ended December 31, 2018 filed with the Securities and Exchange Commission on February 26, 2019.

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 basis, management evaluates its estimates and judgments, including those related to revenue recognition, stock-based compensation, inventory, intangible assets, goodwill and other long-lived assets, warranty liabilities, pension liabilities, acquisition expenses, income taxes and investments. Management bases its estimates and judgments on historical experience and on various other factors that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

2) Recently Issued Accounting Pronouncements

In October 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2018-16, “Derivatives and Hedging (Topic 815).” This standard permits the use of the Overnight Index Swap Rate (“OIS”) based on the Secured Overnight Financing Rate as a U.S. benchmark interest rate for hedge accounting purposes under Topic 815 in addition to the interest rates on direct treasury obligations of the U.S. government, the London Interbank Offered Rate (“LIBOR”) swap rate, the OIS rate based on the Federal Funds Effective Rate and the Securities Industry and Financial Markets Association Municipal Swap Rate. This standard is effective for annual periods beginning after December 15, 2018, including interim periods within those fiscal years. The Company adopted this ASU during the first quarter of 2019 and the adoption of this ASU did not have a material impact on the Company’s consolidated financial statements.

In August 2018, the FASB issued ASU 2018-15, “Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract.” This standard aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments to this update. This standard is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years. The Company does not expect adoption of this ASU to have a material impact on the Company’s consolidated financial statements.

In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815).” This standard better aligns an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. The provisions of this ASU are effective for annual periods beginning after December 15, 2018, including interim periods within those fiscal years. The Company adopted this ASU during the first quarter of 2019 and the adoption of this ASU did not have a material impact on the Company’s consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases. This standard requires the recognition of lease assets and liabilities for all leases, with certain exceptions, on the balance sheet. This ASU is effective for annual periods beginning after December 15, 2018, including interim periods within those fiscal years. The Company adopted ASU 2016-02 on January 1, 2019, and used the effective date as its date of initial application. As such, the Company did not adjust prior period amounts. The Company also elected to adopt the package of practical expedients upon transition, which permits companies to not reassess lease identification, classification, and initial direct costs under ASU 2016-02 for leases that commenced prior to the effective date. The Company implemented internal controls and a lease accounting information system to enable

7

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

preparation on adoption. Upon adoption, the Company recorded a cumulative effect of initially applying this new standard, resulting in the addition of $71,042 of right-of-use assets and $20,192 and $54,147 of short-term and long-term lease liabilities, respectively. The right-of-use asset is net of the deferred rent liability, prepaid rent and a net favorable lease asset which were re-classified to the right-of-use asset upon adoption of the standard. For additional information on the required disclosures related to the impact of adopting this standard, see Note 3 to the Consolidated Condensed Financial Statements.

3) Leases

The Company has operating leases for real estate and non-real estate, which are comprised of automobiles, in North America, Europe, and Asia. The Company does not have any finance leases.

The Company has lease arrangements with lease and non-lease components, has elected to account for the lease and non-lease components as a single lease component, and has allocated all of the contract consideration to the lease component only. The Company has existing net leases in which the non-lease components (e.g. common area maintenance, maintenance, consumables, etc.) are paid separately from rent based on actual costs incurred. Therefore, non-lease components are not included in the right-of-use asset and lease liability and are reflected as expenses in the periods incurred.

The Company has existing leases that include variable lease and non-lease components that are not included in the right-of-use asset and lease liability, and are reflected as expenses in the periods incurred. Such payments primarily include common area maintenance charges and increases in rent payments that are driven by factors such as future changes in an index (e.g., the Consumer Price Index).

A right-of-use asset of $65,628, short-term lease liability of $19,459 and long-term lease liability of $49,392 were reflected on the balance sheet as of March 31, 2019.

The elements of lease expense were as follows:

	Three Months Ended March 31, 2019
Lease Cost:
Operating lease cost	$	5,377
Other Information:
Operating cash flows used for operating leases	$	5,711
Weighted average discount rate		3.81	%
Weighted average remaining lease term		4.9 years

Future lease payments under non-cancelable leases as of March 31, 2019 are detailed as follows:

2019 (remaining)	$	16,831
2020		18,608
2021		12,687
2022		7,518
2023		6,315
Thereafter		13,761
Total lease payments		75,720
Less: imputed interest		6,869
Total operating lease liabilities	$	68,851

8

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

Minimum lease payments under operating leases prior to adoption of ASU 2016-02 were as follows:

Year Ending December 31,	Operating Leases
2019	$	20,106
2020		17,142
2021		10,325
2022		5,573
2023		4,411
Thereafter		8,739
Total minimum lease payments	$	66,296

4) Revenue from Contracts with Customers

Contract assets as of March 31, 2019 and December 31, 2018 were $3,624 and $3,624, respectively, and included in other current assets.

A rollforward of the Company’s deferred revenue and customer advances is as follows:

	Three Months Ended March 31, 2019
Beginning balance, January 1(1)	$	17,474
Deferred revenue and customer advances assumed in ESI Merger		3,314
Additions to deferred revenue and customer advances		17,219
Amount of deferred revenue and customer advances recognized in income		(13,933	)
Ending balance, March 31(2)	$	24,074

⁽¹⁾ Beginning deferred revenue and customer advances as of January 1, 2019 included $8,134 of current deferred revenue, $3,228 of long-term deferred revenue and $6,112 of current customer advances.

⁽²⁾ Ending deferred revenue as of March 31, 2019 included $13,322 of current deferred revenue, $3,018 of long-term deferred revenue and $7,734 of current customer advances.

Disaggregation of Revenue

The following table summarizes revenue from contracts with customers:

	Three Months Ended March 31, 2019
	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Total
Net revenues:
Products	$	192,648	$	178,697	$	26,018	$	397,363
Services		41,707		15,291		9,200		66,198
Total net revenues	$	234,355	$	193,988	$	35,218	$	463,561
	Three Months Ended March 31, 2018
	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Total
Net revenues:
Products	$	304,336	$	192,341	$	—	$	496,677
Services		44,008		13,590		—		57,598
Total net revenues	$	348,344	$	205,931	$	—	$	554,275

9

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

Product revenue, excluding revenue from certain custom products, is recorded at a point in time, while the majority of the service revenue and revenue from certain custom products is recorded over time.

Refer to Note 17 for revenue by reportable segment, geography and groupings of similar products.

5) Investments

The fair value of investments classified as short-term consists of the following:

	March 31, 2019		December 31, 2018
Available-for-sale investments:
Time deposits and certificates of deposit	$	101	$	102
Bankers’ acceptance drafts		1,722		989
Asset-backed securities		—		9,113
Commercial paper		33,509		19,359
Corporate obligations		8,994		9,352
U.S. treasury obligations		—		13,298
U.S. agency obligations		—		21,613
	$	44,326	$	73,826

Investments classified as long-term consist of the following:

	March 31, 2019		December 31, 2018
Available-for-sale investments:
Group insurance contracts	$	5,950	$	5,890
Cost method investments:
Minority interest in a private company		4,400		4,400
	$	10,350	$	10,290

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

As of March 31, 2019:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Short-term investments:
Available-for-sale investments:
Time deposits and certificates of deposit	$	99	$	2	$	—		$	101
Bankers’ acceptance drafts		1,722		—		—			1,722
Commercial paper		33,752		1		(244	)		33,509
Corporate obligations		8,996		1		(3	)		8,994
	$	44,569	$	4	$	(247	)	$	44,326
As of March 31, 2019:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Long-term investments:
Available-for-sale investments:
Group insurance contracts	$	5,582	$	368	$	—		$	5,950

10

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

As of December 31, 2018:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Short-term investments:
Available-for-sale investments:
Time deposits and certificates of deposit	$	102	$	—	$	—		$	102
Bankers’ acceptance drafts		989		—		—			989
Asset-backed securities		9,121		1		(9	)		9,113
Commercial paper		19,504		—		(145	)		19,359
Corporate obligations		9,367		—		(15	)		9,352
U.S. treasury obligations		13,294		4		—			13,298
U.S. agency obligations		21,617		2		(6	)		21,613
	$	73,994	$	7	$	(175	)	$	73,826

As of December 31, 2018:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Estimated Fair Value
Long-term investments:
Available-for-sale investments:
Group insurance contracts	$	5,546	$	344	$	—	$	5,890

The tables above, which show the gross unrealized gains and (losses) aggregated by investment category for available-for-sale investments as of March 31, 2019 and December 31, 2018, reflect the inclusion within short-term investments of investments with contractual maturities greater than one year from the date of purchase. Management has the ability, if necessary, to liquidate any of its investments in order to meet the Company’s liquidity needs in the next 12 months. Accordingly, those investments with contractual maturities greater than one year from the date of purchase are classified as short-term on the accompanying balance sheets.

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 March 31, 2019 and December 31, 2018 were temporary.

Interest income is accrued as earned. Dividend income is recognized as income on the date the stock trades “ex-dividend.” The cost of marketable securities sold is determined by the specific identification method. Realized gains or losses are reflected in income and were not material for the three months ended March 31, 2019 and 2018.

6) Fair Value Measurements

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

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

Level 1

Quoted prices in active markets for identical assets or liabilities 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.

11

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share 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.

12

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

Assets and liabilities of the Company are measured at fair value on a recurring basis as of March 31, 2019 and are summarized as follows:

			Fair Value Measurements at Reporting Date Using
Description	March 31, 2019		Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents:
Money market funds	$	294	$	294	$	—	$	—
Time deposits and certificates of deposit		3,852		—		3,852		—
Commercial paper		82,584		—		82,584		—
Corporate obligations		12,570		—		12,570		—
U.S. agency obligations		49,084		—		49,084		—
Restricted cash – money market funds		317		317		—		—
Available-for-sale investments:
Time deposits and certificates of deposit		101		—		101		—
Bankers’ acceptance drafts		1,722		—		1,722		—
Commercial paper		33,509		—		33,509		—
Corporate obligations		8,994		—		8,994		—
Group insurance contracts		5,950		—		5,950		—
Derivatives – currency forward contracts		3,492		—		3,492		—
Funds in investments and other assets:
Israeli pension assets		14,481		—		14,481		—
Derivatives – interest rate hedge – non-current		4,459		—		4,459		—
Deferred compensation plan assets:
Mutual funds and exchange traded funds		1,799		—		1,799		—
Money market securities		274		—		274		—
Total assets	$	223,482	$	611	$	222,871	$	—
Liabilities:
Derivatives – currency forward contracts	$	322	$	—	$	322	$	—
Reported as follows:
Assets:
Cash and cash equivalents, including restricted cash(1)	$	148,701	$	611	$	148,090	$	—
Short-term investments		44,326		—		44,326		—
Other current assets		3,492		—		3,492		—
Total current assets	$	196,519	$	611	$	195,908	$	—
Long-term investments(2)	$	5,950	$	—	$	5,950	$	—
Other assets		21,013		—		21,013		—
Total long-term assets	$	26,963	$	—	$	26,963	$	—
Liabilities:
Other current liabilities	$	322	$	—	$	322	$	—

⁽¹⁾ The cash and cash equivalent amounts presented in the table above do not include cash of $269,315 as of March 31, 2019.

⁽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.

13

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

Assets and liabilities of the Company are measured at fair value on a recurring basis as of December 31, 2018 and are summarized as follows:

			Fair Value Measurements at Reporting Date Using
Description	December 31, 2018		Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents:
Money market funds	$	180,340	$	180,340	$	—	$	—
Time deposits and certificates of deposit		850		—		850		—
Commercial paper		2,687		—		2,687		—
U.S. agency obligations		3,418		—		3,418		—
Restricted cash – money market funds		110		110		—		—
Available-for-sale investments:
Time deposits and certificates of deposit		102		—		102		—
Bankers’ acceptance drafts		989		—		989		—
Asset-backed securities		9,113		—		9,113		—
Commercial paper		19,359		—		19,359		—
Corporate obligations		9,352		—		9,352		—
U.S. treasury obligations		13,298		—		13,298		—
U.S. agency obligations		21,613		—		21,613		—
Group insurance contracts		5,890		—		5,890		—
Derivatives – currency forward contracts		2,485		—		2,485		—
Funds in investments and other assets:
Israeli pension assets		14,408		—		14,408		—
Derivatives – interest rate hedge – non-current		6,083		—		6,083		—
Total assets	$	290,097	$	180,450	$	109,647	$	—
Liabilities:
Derivatives – currency forward contracts	$	1,168	$	—	$	1,168	$	—
Reported as follows:
Assets:
Cash and cash equivalents, including restricted cash(1)	$	187,405	$	180,450	$	6,955	$	—
Short-term investments		73,826		—		73,826		—
Other current assets		2,485		—		2,485		—
Total current assets	$	263,716	$	180,450	$	83,266	$	—
Long-term investments(2)	$	5,890	$	—	$	5,890	$	—
Other assets		20,491		—		20,491		—
Total long-term assets	$	26,381	$	—	$	26,381	$	—
Liabilities:
Other current liabilities	$	1,168	$	—	$	1,168	$	—

⁽¹⁾ The cash and cash equivalent amounts presented in the table above do not include cash of $456,940 as of December 31, 2018.

⁽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.

14

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

Money Market Funds

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

Available-For-Sale Investments

Available-for-sale investments consisted of time deposits, certificates of deposit, bankers’ acceptance drafts, asset-backed securities (which include auto loans, credit card receivables and equipment trust receivables), commercial paper, corporate obligations, U.S. treasury obligations, U.S. agency obligations and group insurance contracts.

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

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 rates and variable 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 and interest rate fluctuations through the use of derivative financial instruments. The principal market in which the Company executes its foreign currency contracts and interest rate swaps is the institutional market in an over-the-counter environment with a relatively high level of price transparency. The market participants usually are large commercial banks. The forward foreign currency exchange contracts and interest rate hedge are valued using broker quotations or market transactions and are classified within Level 2 of the fair value hierarchy.

7) Derivatives

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

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 11. This hedge fixes the interest rate paid on the hedged debt at 1.198% per annum plus the applicable credit spread, which was 2.0% as of March 31, 2019, 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. At March 31, 2019, the notional amount of this transaction was $290,000 and had a fair value of $4,459. At December 31, 2018, the notional amount of this transaction was $290,000 and had a fair value of $6,083.

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

15

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

and Taiwanese currencies. To the extent these derivatives are effective in off-setting the variability of the hedged cash flows, and otherwise meet the hedge accounting criteria, changes in the derivatives’ fair value are not included in current earnings but are included in OCI in stockholders’ equity. These changes in fair value will subsequently be reclassified into earnings, as applicable, when the forecasted transaction occurs. To the extent that a previously designated hedging transaction is no longer an effective hedge, any ineffectiveness measured in the hedging relationship is recorded currently in earnings in the period it occurs. The cash flows resulting from forward exchange contracts are classified in the consolidated statements of cash flows as part of cash flows from operating activities. The Company does not enter into derivative instruments for trading or speculative purposes.

As of March 31, 2019 and December 31, 2018, the Company had outstanding forward foreign exchange contracts with gross notional values of $144,002 and $159,394, respectively. The following tables provide a summary of the primary net hedging positions and corresponding fair values held as of March 31, 2019 and December 31, 2018:

	March 31, 2019
Currency Hedged (Buy/Sell)	Gross Notional Value		Fair Value(1)
U.S. Dollar/Japanese Yen	$	39,022	$	302
U.S. Dollar/South Korean Won		54,077		1,424
U.S. Dollar/Euro		20,146		916
U.S. Dollar/U.K. Pound Sterling		10,921		125
U.S. Dollar/Taiwan Dollar		19,836		403
Total	$	144,002	$	3,170

	December 31, 2018
Currency Hedged (Buy/Sell)	Gross Notional Value		Fair Value(1)
U.S. Dollar/Japanese Yen	$	43,770	$	(478	)
U.S. Dollar/South Korean Won		59,149		570
U.S. Dollar/Euro		23,515		688
U.S. Dollar/U.K. Pound Sterling		11,827		323
U.S. Dollar/Taiwan Dollar		21,133		214
Total	$	159,394	$	1,317

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

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

Derivatives Designated as Hedging Instruments	March 31, 2019			December 31, 2018
Derivative assets:
Foreign exchange contracts(1)	$	3,492		$	2,485
Foreign currency interest rate hedge(2)		4,459			6,083
Derivative liabilities:
Foreign exchange contracts(1)		(322	)		(1,168	)
Total net derivative asset designated as hedging instruments	$	7,629		$	7,400

⁽¹⁾ The derivative assets of $3,492 and $2,485 as of March 31, 2019 and December 31, 2018, respectively, related to foreign exchange contracts and are classified in other current assets in the consolidated balance sheet. The derivative liabilities of $322 and $1,168 as of March 31, 2019 and December 31, 2018, respectively, 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 foreign currency interest rate hedge assets of $4,459 and $6,083 as of March 31, 2019 and December 31, 2018, respectively, are classified in other assets in the consolidated balance sheet.

The net amount of existing gains as of March 31, 2019 that the Company expects to reclassify from OCI into earnings within the next twelve months is immaterial.

16

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

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

	Three Months Ended March 31,
Derivatives Designated as Cash Flow Hedging Instruments	2019		2018
Forward exchange contracts:
Net gain recognized in OCI(1)	$	67	$	66
Net gain (loss) reclassified from accumulated OCI into income(2)	$	949	$	(2,539	)

⁽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 March 31, 2019 and 2018. The tax effect of the gains or losses reclassified from accumulated OCI into income is immaterial.

The following table provides a summary of the gain (loss) on derivatives not designated as hedging instruments:

	Three Months Ended March 31,
Derivatives Not Designated as Hedging Instruments	2019		2018
Forward exchange contracts:
Net gain (loss) recognized in income(1)	$	57	$	(1,253	)

⁽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 other (expense) income.

8) Inventories

Inventories consist of the following:

	March 31, 2019		December 31, 2018
Raw materials	$	303,588	$	235,593
Work-in-process		76,560		61,908
Finished goods		95,485		87,188
	$	475,633	$	384,689

9) Acquisitions

Electro Scientific Industries, Inc.

On February 1, 2019, the Company completed its acquisition of Electro Scientific Industries, Inc. (“ESI”) pursuant to an Agreement and Plan of Merger, dated as of October 29, 2018 (the “Merger Agreement”), by and among the Company, EAS Equipment, Inc., formerly a Delaware corporation and a wholly-owned subsidiary of the Company, and ESI (the “ESI Merger”). At the effective time of the ESI Merger and pursuant to the terms and conditions of the Merger Agreement, each share of ESI’s common stock that was issued and outstanding immediately prior to the effective time of the ESI Merger was converted into the right to receive $30.00 in cash, without interest and subject to deduction of any required withholding tax.

The aggregate consideration of approximately $1,032,671, excluding related transaction fees and expenses, and non-cash consideration related to the exchange of share-based awards of approximately $30,630 for a total purchase consideration of approximately $1,063,301. 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 described in Note 11.

ESI provides laser-based manufacturing solutions for the micro-machining industry that enable customers to optimize production. It’s market is composed primarily of flexible and rigid PCB processing/fabrication, semiconductor wafer processing and passive component manufacturing and testing. ESI solutions incorporate specialized laser technology and proprietary control software to efficiently process the materials and components that are an integral part of electronic devices and systems.

17

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

The purchase price of ESI consisted of the following:

Cash paid for outstanding shares(1)	$	1,032,671
Settlement of share-based compensation awards(2)		30,630
Total purchase price		1,063,301
Less: Cash and cash equivalents acquired		(44,072	)
Total purchase price, net of cash and cash equivalents acquired	$	1,019,229

⁽¹⁾  Represents cash paid of $30.00 per share for approximately 34,422,361 shares of ESI common stock, without interest and subject to a deduction for any required withholding tax.

⁽²⁾  Represents the vested but not issued portion of ESI share-based compensation awards as of the acquisition date of February 1, 2019.

Under the acquisition method of accounting, the total estimated acquisition consideration is allocated to the acquired tangible and intangible assets and assumed liabilities of ESI 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 expects that none of such goodwill and intangible assets will be deductible for tax purposes.

The following table summarizes the allocation of the preliminary purchase price to the fair values assigned to assets acquired and liabilities assumed at the date of the ESI Merger:

Current assets (excluding inventory)	$	209,194
Inventory		92,364
Intangible assets		318,600
Goodwill		471,403
Property, plant and equipment		52,891
Long-term assets		9,633
Total assets acquired		1,154,085
Current liabilities		51,479
Non-current deferred taxes		32,146
Other long-term liabilities		7,159
Total liabilities assumed		90,784
Fair value of assets acquired and liabilities assumed		1,063,301
Less: Cash and cash equivalents acquired		(44,072	)
Total purchase price, net of cash and cash equivalents acquired	$	1,019,229

The fair value write-up of acquired finished goods inventory and demonstration inventory was $8,383, the amount of which will be expensed over the period during which the acquired inventory is sold. Accordingly, for the three months ended March 31, 2019, the Company recorded a $5,140 incremental cost of sales charge associated with the fair value write-up of inventory acquired in the ESI Merger.

The fair value write-up of acquired property, plant and equipment of $26,667 will be amortized over the estimated useful life of the applicable assets. Property, plant and equipment is valued at its value-in-use, unless there was a known plan to dispose of the asset.

The acquired intangible assets are being amortized on a straight-line basis, which approximates the economic use of the asset.

18

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

The following table reflects the allocation of the acquired intangible assets and related estimate of useful lives:

Completed technology - Laser	$	257,900	12 years
Completed technology - Non-Laser		18,500	10 years
Trademarks and trade names		14,400	7 years
Customer relationships		25,400	10 years
Backlog		2,400	1 year
	$	318,600

The net 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.

While the Company uses its best estimates and assumptions as part of the purchase price allocation process to value the assets acquired and liabilities assumed on the acquisition date, its estimates and assumptions are subject to refinement. Fair value estimates are based on a complex series of judgments about future events and uncertainties and rely heavily on estimates and assumptions. The judgments used to determine the estimated fair value assigned to each class of assets acquired and liabilities assumed, as well as asset lives, can materially impact the Company’s results of operations. The finalization of the purchase accounting assessment will result in a change in the valuation of assets acquired and liabilities assumed and may have a material impact on the Company’s results of operations and financial position. As a result, during the measurement period, which may be up to one year from the acquisition date, the Company records adjustments to the assets acquired and liabilities assumed with a corresponding offset to goodwill to reflect additional information received about facts and circumstances which existed at the date of acquisition. The Company records adjustments to the assets acquired and liabilities assumed subsequent to the purchase price allocation period in the Company’s operating results in the period in which the adjustments are determined. The size and breadth of the ESI Merger will necessitate the use of this measurement period to adequately analyze and assess a number of the factors used in establishing the fair value of certain tangible and intangible assets acquired and liabilities assumed as of the acquisition date and the related tax impacts of any changes made. Any potential adjustments made could be material in relation to the preliminary values presented above.

The Company believes the amount of goodwill relative to identifiable intangible assets relates to several factors including: (1) broadening its position in key industrial end markets to complementary solutions; and (2) leveraging component and systems expertise to provide robust solutions to meet customer evolving technology needs.

The results of this acquisition were included in the Company’s consolidated statement of operations beginning on February 1, 2019. ESI constitutes the Company’s Equipment & Solutions reportable segment (see Note 17).

Certain executives from ESI had severance provisions in their respective ESI 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. The Company recorded costs of $2,701 and $14,023 in acquisition and integration costs as compensation expense and stock-based compensation expense, respectively, for the three months ended March 31, 2019 associated with these severance provisions. The restricted stock units and stock appreciation rights that were eligible for accelerated vesting if the executive exercised his or her rights but were not issued as of each reporting period-end, will be excluded from the computation of basic earnings per share and included in the computation of diluted earnings per share for such reporting period.

In addition, the Company recorded $6,764 in acquisition and integration costs, which were primarily advisory services costs.

19

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

The Company’s consolidated net revenue and earnings for the three months ended March 31, 2019 include the following amounts of revenue and earnings of ESI since the acquisition date:

	Three Months Ended March 31, 2019
Total net revenues	$	35,218
Net loss	$	(31,716	)
Net loss per share:
Basic	$	(0.59	)
Diluted	$	(0.59	)

Pro Forma Results

The following unaudited pro forma financial information presents the combined results of operations of the Company as if the ESI Merger had occurred on January 1, 2018. The unaudited pro forma financial information is not necessarily indicative of what the Company’s condensed consolidated results of operations actually would have been had the acquisition occurred at the beginning of each year. In addition, the unaudited pro forma financial information does not attempt to project the future results of operations of the combined Company.

	Three Months Ended March 31,
	2019		2018
Total net revenues	$	478,069	$	660,513
Net income	$	49,135	$	101,633
Net income per share:
Basic	$	0.91	$	1.87
Diluted	$	0.90	$	1.84

The unaudited pro forma financial information above gives effect primarily to the following:

(1) Incremental amortization and depreciation expense related to the estimated fair value of identifiable intangible assets and property, plant and equipment, respectively from the purchase price allocation.

(2) Revenue and cost of goods sold, adjustments as a result of the reduction in deferred revenue and the cost related to their estimated fair value.

(3) Incremental interest expense related to the Company’s Incremental Term Loan Facility, as discussed in Note 11.

(4) The exclusion of acquisition costs and inventory and demonstration inventory step-up amortization from the three month periods ended March 31, 2019 and the addition of these items to the three month period ended March 31, 2018.

(5) The exclusion of debt issuance costs due to the modification of the Incremental Term Loan Facility from the three month period ended March 31, 2019 and the addition of this item to the three month period ended March 31, 2018.

(6) The estimated tax impact of the above adjustments.

10) 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

20

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

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.

Effective July 1, 2018, the Company reassigned goodwill to certain reporting units within the Light & Motion reportable segment resulting from a reorganization of the composition of goodwill reporting units. The goodwill was reassigned to the reporting units affected using the relative fair value approach. In conjunction with this goodwill reassignment, the Company performed an interim quantitative impairment test as of July 1, 2018 for all of its reporting units and concluded that the fair values of each reporting unit exceeded their respective carrying values.    

Effective January 1, 2019, the Company reassigned goodwill to certain reporting units within the Light & Motion reportable segment resulting from a reorganization of the composition of goodwill reporting units. The goodwill was reassigned to the reporting units affected using the relative fair value approach. The Company also concluded that the fair value of each reporting unit exceeded its respective carrying value.

The changes in the carrying amount of goodwill and accumulated impairment loss during the three months ended March 31, 2019 and year ended December 31, 2018 were as follows:

	Three Months Ended March 31, 2019									Twelve Months Ended December 31, 2018
	Gross Carrying Amount			Accumulated Impairment Loss			Net			Gross Carrying Amount			Accumulated Impairment Loss			Net
Beginning balance at January 1	$	731,272		$	(144,276	)	$	586,996		$	735,323		$	(144,276	)	$	591,047
Acquired goodwill(1)		471,403			—			471,403			—			—			—
Foreign currency translation		(1,068	)		—			(1,068	)		(4,051	)		—			(4,051	)
Ending balance at March 31, 2019 and December 31, 2018	$	1,201,607		$	(144,276	)	$	1,057,331		$	731,272		$	(144,276	)	$	586,996

⁽¹⁾ During the three months ended March 31, 2019, the Company recorded $471,403 of goodwill related to the ESI Merger.

Intangible Assets

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

As of March 31, 2019:	Gross		Accumulated Impairment Charges			Accumulated Amortization			Foreign Currency Translation			Net
Completed technology(1)	$	448,831	$	(105	)	$	(146,614	)	$	(162	)	$	301,950
Customer relationships(1)		308,144		(1,406	)		(68,738	)		(819	)		237,181
Patents, trademarks, trade names and other(1)		120,895		—			(40,976	)		41			79,960
	$	877,870	$	(1,511	)	$	(256,328	)	$	(940	)	$	619,091

⁽¹⁾ During the three months ended March 31, 2019, the Company recorded $318,600 of separately identified intangible assets related to the ESI Merger, of which $276,400 was completed technology, $25,400 was customer relationships and $16,800 was trademarks, trade names and backlog. Separately, on January 1, 2019, the Company reclassified $6,428 of gross favorable lease assets and $3,445 of related accumulated amortization from patents, trademarks, trade names and other to the right-of-use asset line in the balance sheet.

21

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

As of December 31, 2018:	Gross		Impairment Charges			Accumulated Amortization			Foreign Currency Translation			Net
Completed technology	$	172,431	$	(105	)	$	(137,283	)	$	(73	)	$	34,970
Customer relationships		282,744		(1,406	)		(63,788	)		(269	)		217,281
Patents, trademarks, trade names and other		110,523		—			(42,954	)		(13	)		67,556
	$	565,698	$	(1,511	)	$	(244,025	)	$	(355	)	$	319,807

Aggregate amortization expense related to acquired intangibles for the three months ended March 31, 2019 and 2018 was $15,727 and $11,190, respectively. The net amortization expense from favorable lease commitments for the three months ended March 31, 2019 and 2018 was net of $0 and $407, respectively. Aggregate net amortization expense related to acquired intangible assets for future years is as follows:

Year	Amount
2019 (remaining)	$	51,638
2020		55,751
2021		47,958
2022		45,480
2023		45,121
2024		44,204
Thereafter		273,039

11) Debt

Term Loan Credit Agreement

In connection with the completion of the acquisition of Newport Corporation in 2016 (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 in the original principal amount of $780,000 (the “2016 Term Loan Facility”), subject to increase at the Company’s option and subject to receipt of lender commitments in accordance with the Credit Agreement (the 2016 Term Loan Facility, together with the 2019 Incremental Term Loan Facility (as defined below), “Term Loan Facility”). The 2016 Term Loan Facility matures on April 29, 2023. 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; 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. The Company has elected the interest rate as described in clause (b). The Credit Agreement provides that, unless an alternate rate of interest is agreed, all loans will be determined by reference to the Base Rate if the LIBOR rate cannot be ascertained, if regulators impose material restrictions on the authority of a lender to make LIBOR rate loans, or for other reasons. The 2016 Term Loan Facility was issued with original issue discount of 1.00% of the principal amount thereof.

The Company subsequently entered into four separate repricing amendments to the 2016 Term Loan Facility, which decreased the applicable margin for LIBOR borrowings from 4.0% to 1.75%, with a LIBOR rate floor of 0.75%. As a consequence of the pricing of the 2019 Incremental Term Loan Facility (defined below), the applicable margin for the 2016 Term Loan Facility was increased to 2.00% (from 1.75%) with respect to LIBOR borrowings and 1.00% (from 0.75%) with respect to base rate borrowings. The interest rate on the 2016 Term Loan Facility as of March 31, 2019 was 4.5%.

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 2016 Term Loan Facility. The rate is fixed at 1.198% per annum plus the applicable credit spread, which was 2.0% at March 31, 2019. At March 31, 2019, the notional amount of this transaction was $290,000 and had a fair value of $4,459.

22

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

As of March 31, 2019, after total principal prepayments of $425,000 and regularly scheduled principal payments of $6,536, the total outstanding principal balance of the 2016 Term Loan Facility was $348,464. As a result of making these prepayments, the Company is no longer required to make any regularly scheduled principal payments on the 2016 Term Loan Facility until the maturity date of the loan.

The Company incurred $28,747 of deferred finance fees, original issue discount and repricing fees related to the term loans under the 2016 Term Loan Facility, which are included in long-term debt in the accompanying consolidated balance sheets and are being amortized to interest expense over the estimated life of the term loans using the effective interest method. A portion of these fees have been accelerated in connection with the various debt prepayments during 2016, 2017 and 2018. As of March 31, 2019, the remaining balance of the deferred finance fees, original issue discount and repricing fees related to the 2016 Term Loan Facility was $3,980.

On February 1, 2019, in connection with the completion of the ESI Merger, the Company entered into an amendment (“Amendment No. 5”) to the Credit Agreement. Amendment No. 5 provided an additional tranche B-5 term loan commitment in the principal amount of $650,000 (the “2019 Incremental Term Loan Facility”), all of which was drawn down in connection with the closing of the ESI Merger. Pursuant to Amendment No. 5, the Company also effectuated certain amendments to the Credit Agreement which make certain of the negative covenants and other provisions less restrictive. The 2019 Incremental Term Loan Facility matures on February 1, 2026 and bears interest at a rate per annum equal to, at the Company’s option, a base rate or LIBOR rate (as described above) plus, in each case, an applicable margin equal to 1.25% with respect to base rate borrowings and 2.25% with respect to LIBOR borrowings. The 2019 Incremental Term Loan Facility was issued with original issue discount of 1.00% of the principal amount thereof.

The Company incurred $11,362 of deferred finance fees and original issue discount fees related to the term loans under the 2019 Incremental Term Loan Facility, which are included in long-term debt in the accompanying consolidated balance sheets and are being amortized to interest expense over the estimated life of the term loans using the effective interest method. As of March 31, 2019, the remaining balance of the deferred finance fees and original issue discount related to the 2019 Incremental Term Loan Facility was $11,244.

The Company is required to make scheduled quarterly payments each equal to 0.25% of the original principal amount of the 2019 Incremental Term Loan Facility, with the balance due on February 1, 2026. If on or prior to the date that is six months after the closing date of Amendment No. 5, the Company prepays any loans under the 2019 Incremental Term Loan Facility in connection with a repricing transaction, the Company must pay a prepayment premium of 1.00% of the aggregate principal amount of the loans so prepaid. At March 31, 2019, the total balance outstanding of the 2019 Incremental Term Loan Facility was $650,000 and the interest rate was 4.7%.

Under the Credit Agreement, the Company is required to prepay outstanding term loans under the 2016 Term Loan Facility and the 2019 Incremental Term Loan Facility, 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. As a result the Company’s Total Leverage Ratio, it was not required to make a prepayment of excess cash flow for the fiscal year ended December 31, 2018.

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 March 31, 2019, 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 in April 2016, the Company 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, that provided senior secured financing of up to $50,000, which the Company never borrowed against. On February 1, 2019, in connection with the completion of the ESI Merger, the Company terminated the $50,000 asset-based credit agreement with Deutsche Bank AG New York Branch and entered into an asset-based credit agreement with Barclays Bank PLC, as administrative agent and collateral agent, the other borrowers from time to time party thereto, and the lenders and letters of credit issuers from

23

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

time to time party thereto (the “ABL Credit Agreement”), that provides senior secured revolving credit financing of up to $100,000, subject to a borrowing base limitation (the “ABL Facility”). The borrowing base for the ABL Facility at any time equals the sum of: (a) 85% of certain eligible accounts; plus (b) prior to certain notice and filed examination and appraisal requirements, the lesser of (i) 20% of net book value of eligible inventory in the United States and (ii) 30% of the borrowing base, and after the satisfaction of such 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. The ABL Facility includes borrowing capacity in the form of letters of credit up to $25,000.

Borrowings under the ABL Facility bear interest at a rate per annum equal to, at the Company’s option, any of the following, plus, in each case, an applicable margin: (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 0.00%; 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, with a floor of 0.00%. The initial applicable margin for borrowings under the ABL Facility is 0.50% with respect to base rate borrowings and 1.50% with respect to LIBOR borrowings. 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.

In addition to paying interest on any outstanding principal under the ABL Facility, the Company is required to pay a commitment fee in respect of the unutilized commitments thereunder equal to 0.25% per annum. The Company must also pay customary letter of credit fees and agency fees.

The Company incurred $785 of costs in connection with the new ABL Facility, which were capitalized and included in other assets in the accompanying consolidated balance sheet and are being amortized to interest expense over the contractual term of five years of the ABL Facility. As a result of the prior asset-based facility being terminated, the Company wrote off $216 of previously capitalized debt issuance costs.

The ABL Credit Agreement also contains customary representations and warranties, affirmative covenants and provisions relating to events of default. If an event of default occurs, the lenders under the ABL Facility will be entitled to take various actions, including the acceleration of amounts due under the ABL Facility and all actions permitted to be taken by a secured creditor.

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 March 31, 2019 of up to an equivalent of $20,747. One of the borrowing arrangements has an interest rate based on the Tokyo Interbank Offer Rate at the time of borrowing and the other has an interest rate based on the Japanese Short-Term Prime Lending Rate. There were no borrowings outstanding under these arrangements at March 31, 2019 and December 31, 2018, respectively.

The Company has various revolving lines of credit and a financing facility. These revolving lines of credit and financing facility have no expiration date and as of March 31, 2019, provided for aggregate borrowings of up to an equivalent of $11,275. These lines of credit have a base interest rate of 1.25% plus a Japanese Yen overnight LIBOR rate. Total borrowings outstanding under these arrangements were $3,195 and $3,389 at March 31, 2019 and December 31, 2018, respectively.

One of the Company’s Austrian subsidiaries has various 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% to 0.75%.

24

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

	March 31, 2019		December 31, 2018
Short-term debt:
Japanese lines of credit	$	2,175	$	2,724
Japanese receivables financing facility		1,020		665
Austrian loans due through March 2020		586		597
Term Loan Facility		6,500		—
	$	10,281	$	3,986

	March 31, 2019		December 31, 2018
Long-term debt:
Austrian loans due through March 2020 and other debt	$	83	$	86
Term Loan Facility, net(1)		976,740		343,756
	$	976,823	$	343,842

⁽¹⁾  Net of deferred financing fees, original issuance discount and repricing fee of $15,224 and $4,708 as of March 31, 2019 and December 31, 2018, respectively.

The Company recognized interest expense of $9,119 and $5,430 for the three months ended March 31, 2019 and 2018, respectively.

Contractual maturities of the Company’s debt obligations as of March 31, 2019 are as follows:

Year	Amount
2019 (remaining	$	8,656
2020		6,583
2021		6,500
2022		6,500
2023		354,964
2024		6,500
Thereafter		612,625

12) 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:

	Three Months Ended March 31,
	2019			2018
Beginning of period	$	10,399		$	10,104
Assumed product warranty liability from ESI Merger		7,177			—
Provision for product warranties		6,062			5,184
Direct and other charges to warranty liability		(6,705	)		(4,073	)
End of period(1)	$	16,933		$	11,215

⁽¹⁾  As of March 31, 2019, short-term product warranty of $13,843 and long-term product warranty of $3,090 were included within other current liabilities and other liabilities, respectively, within the accompanying condensed consolidated balance sheet. As of March 31, 2018, short-term product warranty of $10,856 and long-term product warranty of $359 were included within other current liabilities and other liabilities, respectively, within the accompanying condensed consolidated balance sheet.

25

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

13) Income Taxes

The Company’s effective tax rates for the three months ended March 31, 2019 and 2018 were 18.8% and 17.1%, respectively. The effective tax rate for the three months ended March 31, 2019 and the related income tax expense were lower than the U.S. statutory tax rate due to the U.S. deduction for foreign derived intangible income, the federal tax credit for research activities and the geographic mix of income earned by the Company’s international subsidiaries being taxed at rates lower than the U.S. statutory tax rate, offset by the global intangible low-taxed income inclusion, the limitation on the deduction of executive compensation and state income taxes.

The Company’s effective tax rate for the three months ended March 31, 2018 and the related income tax expense were 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, windfall benefits of stock compensation and the deduction for foreign derived intangible income offset by the tax effects from global intangible low-taxed income and state income taxes.

As of March 31, 2019, the total amount of gross unrecognized tax benefits, which excludes interest and penalties, was approximately $40,725. At December 31, 2018, the total amount of gross unrecognized tax benefits, which excludes interest and penalties, was approximately $32,684. The net increase was primarily attributable to the addition of historical gross unrecognized tax benefits for ESI as a result of the ESI Merger during the quarter ended March 31, 2019. As of March 31, 2019, excluding interest and penalties, there were approximately $33,085 of net unrecognized tax benefits 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 March 31, 2019 and December 31, 2018, the Company had accrued interest on unrecognized tax benefits of approximately $543 and $568, respectively.    

Over the next 12 months it is reasonably possible that the Company may recognize approximately $1,452 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 U.S. Internal Revenue Service commenced an examination of the Company’s U.S. federal income tax filings for tax years 2015 and 2016 during the quarter ended September 30, 2017. This audit was effectively settled during the quarter ended March 31, 2018, and the impact was not material. Also during the quarter ended March 31, 2018, the Company received notification from the U.S. Internal Revenue Service of their intent to audit its U.S. subsidiary, Newport Corporation, for tax year 2015. This audit commenced during the quarter ended June 30, 2018 and there have been no proposed adjustments through March 31, 2019. The U.S. statute of limitations remains open for tax years 2015 through present. The statute of limitations for the Company’s tax filings in other jurisdictions varies between fiscal years 2013 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.

26

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

14) Net Income Per Share

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

	Three Months Ended March 31,
	2019		2018
Numerator:
Net income	$	12,455	$	105,121
Denominator:
Shares used in net income per common share – basic		54,147,000		54,423,000
Effect of dilutive securities:
Restricted stock units, stock appreciation rights and shares issued under employee stock purchase plan		701,000		863,000
Shares used in net income per common share – diluted		54,848,000		55,286,000
Net income per common share:
Basic	$	0.23	$	1.93
Diluted	$	0.23	$	1.90

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 months ended March 31, 2019 and 2018 there were approximately 128,200 and 380 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.

15) Stock-Based Compensation

The Company grants restricted stock units (“RSUs”) to employees and directors under the 2014 Stock Incentive Plan (the “2014 Plan”). The 2014 Plan is administered by the Compensation Committee of the Company’s Board of Directors. The 2014 Plan is intended to attract and retain employees and directors, and to provide an incentive for these individuals to assist the Company to achieve long-range performance goals and to enable these individuals to participate in the long-term growth of the Company.

In connection with the completion of the ESI Merger, the Company assumed:

• all RSUs that vest based solely on the satisfaction of service conditions, granted under any ESI equity plan, arrangement or agreement (“ESI Plan”) that were outstanding immediately prior to the effective time of the ESI Merger, and as to which shares of ESI common stock were not fully distributed in connection with the closing of the ESI Merger,

• all RSUs that were granted subject to vesting based on both the achievement of performance goals and the satisfaction of service conditions granted under any ESI Plan that were outstanding immediately prior to the effective time of the ESI Merger, and

• all stock appreciation rights (“SARs”) granted under any ESI Plan, whether vested or unvested, that were outstanding immediately prior to the effective time of the ESI Merger and held by an individual who was a service provider of ESI as of the date on which the effective time of the ESI Merger occurred.

As of the effective time of the ESI Merger, based on a formula in the Merger Agreement, (a) such RSUs were converted automatically into RSUs with respect to 736,133 shares of the Company’s common stock (the “Assumed RSUs”), and (b) all SARs were converted automatically into SARs with respect to 12,787 shares of the Company’s common stock (the “Assumed SARs”).

Included in the total number of assumed RSUs are 326,283 shares of the Company’s common stock for employees and outside directors that are part of the ESI Deferred Compensation plan. These shares 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 Plan.

27

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

The 748,920 shares of the Company’s common stock that are issuable pursuant to the Assumed RSUs and the Assumed SARs under the Company’s 2014 Plan were registered under the Securities Act of 1933 on the Registration Statement on Form S-8. These shares are in addition to the 18,000,000 shares of the Company’s common stock reserved for issuance under the Company’s 2014 Plan and previously registered under the Securities Act of 1933 on the Registration Statement on Form S-8.

During the three months ended March 31, 2019, the Company granted 182,212 RSUs with a weighted average grant date fair value of $82.58. During the three months ended March 31, 2018, the Company granted 122,831 RSUs with a weighted average grant date fair value of $109.62. There were no SARs granted during the three months ended March 31, 2019 or 2018.

The total stock-based compensation expense included in the Company’s consolidated statements of income and comprehensive income was as follows:

	Three Months Ended March 31,
	2019		2018
Cost of revenues	$	422	$	1,005
Research and development expense		810		722
Selling, general and administrative expense		8,038		8,699
Acquisition and integration related expense		18,568		—
Total pre-tax stock-based compensation expense	$	27,838	$	10,426

At March 31, 2019, the total compensation expense related to unvested stock-based awards granted to employees and directors under the 2014 Plan that had not been recognized was $31,356, net of estimated forfeitures. The future compensation expense for time-based awards is recognized on a straight-line basis and the future compensation expense for performance-based awards is recognized using the accelerated graded vesting method, both of which expense over the requisite service period, net of estimated forfeitures, except for retirement eligible employees, in which case 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:

	Three Months Ended March 31, 2019
	Outstanding RSUs			Weighted Average Grant Date Fair Value
RSUs – beginning of period		647,394		$	74.04
Assumed shares from ESI Merger		736,133		$	84.10
Accrued dividend shares		1,558		$	78.45
Granted		182,212		$	82.58
Vested		(274,898	)	$	67.57
Forfeited		(76,096	)	$	91.14
RSUs – end of period		1,216,303		$	81.81

The following table presents the activity for SARs under the Plan:

	Three Months Ended March 31, 2019
	Outstanding SARs			Weighted Average Grant Date Fair Value
SARs – beginning of period		177,538		$	28.52
Assumed SARs from ESI Merger		12,787		$	17.38
Exercised		(23,569	)	$	27.34
Forfeited or expired		(184	)	$	27.89
SARs Outstanding – end of period		166,572		$	27.86

28

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

16) 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 2,588,000 shares of common stock for approximately $127,000 pursuant to the program since its adoption. During the three months ended March 31, 2019 and 2018, there were no repurchases of common stock.

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. In addition, the Company accrues dividend equivalents on the RSUs the Company assumed in the ESI Merger described in Note 15 above when dividends are declared by the Company’s Board of Directors. During the three months ended March 31, 2019, the Company’s Board of Directors declared a quarterly cash dividend of $0.20 per share, which totaled $10,843. During the three months ended March 31, 2018, the Company’s Board of Directors declared a quarterly cash dividend of $0.18 per share, which totaled $9,808.

On May 8, 2019, the Company’s Board of Directors declared a quarterly cash dividend of $0.20 per share to be paid on June 7, 2019 to shareholders of record as of May 27, 2019. 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 Term Loan Facility and its ABL Facility, the Company may be restricted from paying dividends under certain circumstances.

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

The Company is a global provider of instruments, subsystems and process control solutions that measure, monitor, deliver, analyze, power and control critical parameters of advanced manufacturing processes to improve process performance and productivity for its customers. 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, power, reactive gas generation, vacuum technology, lasers, photonics, sub-micron positioning, vibration control, optics and laser-based manufacturing solutions. The Company also provides services relating to the maintenance and repair of its products, installation services and training. The Company’s primary served markets include semiconductor, industrial technologies, life and health sciences, research and defense.

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. Effective February 1, 2019, in conjunction with its acquisition of ESI, the Company created a third reportable segment known as the Equipment & Solutions segment in addition to its existing two reportable segments: the Vacuum & Analysis segment and the Light & Motion segment.

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 positioning, vibration control, and optics.

The Equipment & Solutions segment provides laser-based manufacturing solutions for the micro-machining industry that enable customers to optimize production. The segment’s market is composed primarily of flexible and rigid PCB processing/fabrication, semiconductor wafer processing and passive component manufacturing & test. Equipment & Solutions incorporate specialized laser technology and proprietary control software to efficiently process the materials and components that are an integral part of electronic devices and systems.

29

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

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 March 31,
	2019		2018
Vacuum & Analysis	$	234,355	$	348,344
Light & Motion		193,988		205,931
Equipment & Solutions		35,218		—
	$	463,561	$	554,275

The following table sets forth a reconciliation of segment gross profit to consolidated net income:

	Three Months Ended March 31,
	2019		2018
Gross profit by reportable segment:
Vacuum & Analysis	$	98,139	$	158,500
Light & Motion		92,741		104,355
Equipment & Solutions		7,238		—
Total gross profit by reportable segment		198,118		262,855
Operating expenses:
Research and development		38,933		34,857
Selling, general and administrative		82,455		82,949
Fees and expenses related to incremental term loan		5,847		—
Acquisition and integration costs		30,167		—
Restructuring		223		1,220
Customer contract obligation		1,700		—
Environmental costs		—		1,000
Amortization of intangible assets		15,727		11,190
Income from operations		23,066		131,639
Interest and other expense, net		7,730		4,897
Income before income taxes		15,336		126,742
Provision for income taxes		2,881		21,621
Net income	$	12,455	$	105,121

The following table sets forth capital expenditures by reportable segment for the three months ended March 31, 2019 and 2018:

	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Total
Three Months Ended March 31, 2019:
Capital expenditures	$	7,488	$	5,154	$	1,887	$	14,529
Three Months Ended March 31, 2018:
Capital expenditures	$	6,197	$	3,193	$	—	$	9,390

30

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

The following table sets forth depreciation and amortization by reportable segment for the three months ended March 31, 2019 and 2018:

	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Total
Three Months Ended March 31, 2019:
Depreciation and amortization	$	4,045	$	14,140	$	7,026	$	25,211
Three Months Ended March 31, 2018
Depreciation and amortization	$	5,129	$	15,363	$	—	$	20,492

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:

March 31, 2019:	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Corporate, Eliminations & Other			Total
Segment assets:
Accounts receivable	$	160,040	$	139,592	$	51,088	$	(14,730	)	$	335,990
Inventory, net		225,431		164,603		85,690		(91	)		475,633
Total segment assets	$	385,471	$	304,195	$	136,778	$	(14,821	)	$	811,623

December 31, 2018:	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Corporate, Eliminations & Other			Total
Segment assets:
Accounts receivable	$	171,604	$	140,658	$	—	$	(16,808	)	$	295,454
Inventory, net		222,965		161,658		—		66			384,689
Total segment assets	$	394,569	$	302,316	$	—	$	(16,742	)	$	680,143

The following is a reconciliation of segment assets to consolidated total assets:

	March 31, 2019		December 31, 2018
Total segment assets	$	811,623	$	680,143
Cash and cash equivalents and investments		472,692		728,461
Other current assets		86,387		65,790
Property, plant and equipment, net		251,424		194,367
Right-of-use asset		65,628		—
Goodwill and intangible assets, net		1,676,422		906,803
Other assets		48,562		38,682
Consolidated total assets	$	3,412,738	$	2,614,246

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 tax transfer prices and have been eliminated from consolidated net revenues.

	Three Months Ended March 31,
	2019		2018
Net revenues:
United States	$	224,347	$	276,720
Korea		35,802		54,011
Japan		42,102		58,274
Asia (excluding Korea and Japan)		101,327		101,384
Europe		59,983		63,886
	$	463,561	$	554,275

31

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

	March 31, 2019		December 31, 2018
Long-lived assets:(1)
United States	$	198,747	$	146,687
Europe		29,983		26,794
Asia		57,523		50,572
	$	286,253	$	224,053

⁽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 the Company’s reportable segments is as follows:

	March 31, 2019		December 31, 2018
Reportable segment:
Vacuum & Analysis	$	196,937	$	197,126
Light & Motion		388,896		389,870
Equipment & Solutions		471,498		—
Total goodwill	$	1,057,331	$	586,996

Worldwide Product Information

The Company groups its product offerings into three groups based upon the similarity of product function as follows:

	Three Months Ended March 31,
	2019		2018
Advanced Manufacturing Components	$	371,345	$	496,677
Global Service		66,198		57,598
Advanced Manufacturing Systems		26,018		—
	$	463,561	$	554,275

Advanced manufacturing components are comprised of product revenues from the Company’s Vacuum & Analysis and Light & Motion segments. Global service is comprised of total service revenues for all three of the Company’s reportable segments. Advanced manufacturing systems is comprised of product revenues for the Company’s Equipment & Solutions segment.

18) Restructuring

The Company recorded restructuring charges of $223 during the three months ended March 31, 2019, primarily related to severance costs related to the consolidation of certain functions in Asia. The Company recorded restructuring charges of $1,220 during the three months ended March 31, 2018 primarily related to severance costs related to streamlining and consolidating certain administrative functions.

Restructuring activities were as follows:

	Three Months Ended March 31,
	2019			2018
Beginning of period	$	2,632		$	3,244
Charged to expense		223			1,220
Payments and adjustments		(252	)		(1,806	)
End of period	$	2,603		$	2,658

32

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

19) Commitments and Contingencies

Newport Litigation

In March 2016, two putative class actions lawsuit captioned Dixon Chung v. Newport Corp., et al., Case No. A-16-733154-C, and Hubert C. Pincon v. Newport Corp., et al., Case No. A-16-734039-B, were filed in the District Court, Clark County, Nevada on behalf of a putative class of stockholders of Newport for claims related to the merger agreement (“Newport Merger Agreement”) between the Company, Newport, and a wholly-owned subsidiary of the Company (“Merger Sub”). The lawsuits named as defendants the Company, Newport, Merger Sub, and certain then current and former members of Newport’s board of directors. Both complaints alleged that Newport directors breached their fiduciary duties to Newport’s stockholders by agreeing to sell Newport through an inadequate and unfair process, which led to inadequate and unfair consideration, by agreeing to unfair deal protection devices and by omitting material information from the proxy statement. The complaints also alleged that the Company, Newport, and Merger Sub aided and abetted the directors’ alleged breaches of their fiduciary duties. The complaints sought injunctive relief, including to enjoin or rescind the Newport Merger Agreement, and an award of attorneys’ and other fees and costs, among other relief. On April 14, 2016, the Court consolidated the actions.

On October 19, 2016, plaintiffs in the consolidated action filed an amended complaint captioned In re Newport Corporation Shareholder Litigation, Case No. A-16-733154-B, in the District Court, Clark County, Nevada, on behalf of a putative class of Newport’s stockholders for claims related to the Newport Merger Agreement. The amended complaint contained substantially similar allegations related to Newport’s former board of directors’ alleged breaches of their fiduciary duties to Newport’s stockholders. The amended complaint sought monetary damages, including pre- and post-judgment interest. On June 22, 2017, the Court granted Defendants’ motion to dismiss and dismissed the amended complaint against all defendants but granted plaintiffs leave to amend.

On July 27, 2017, plaintiffs filed a second amended complaint containing substantially similar allegations but naming only Newport’s former directors as defendants. On August 8, 2017, the Court dismissed the Company and Newport from the action. The second amended complaint seeks monetary damages, including pre- and post-judgment interest. The Court granted a motion for class certification on September 27, 2018, appointing Mr. Pincon and Locals 302 and 612 of the International Union of Operating Engineers - Employers Construction Industry Retirement Trust as class representatives. On June 11, 2018, plaintiff Dixon Chung was voluntarily dismissed from the litigation. Discovery is ongoing in this action.

ESI Litigation

On November 29, 2018, a complaint captioned Brian Morris et. al. v. Electro Scientific Industries, Inc. et al. was filed in the U.S. District Court for the District of Oregon by alleged former stockholders of ESI in connection with the ESI Merger. The complaint named the Company’s subsidiary, ESI, and the former members of ESI’s board of directors as defendants. Five additional complaints were subsequently filed, two in the U.S. District Court for the District of Oregon and three in the Multnomah County Circuit Court in the State of Oregon. The cases filed in the U.S. District Court were dated December 6, 2018 and December 12, 2018 and captioned Melvyn Klein et. al. v. Electro Scientific Industries, Inc. et al. and Donald Mager et. al. v. Electro Scientific Industries, Inc. et al., respectively. The complaints filed in Multnomah County Circuit Court were dated December 5, 2018, December 5, 2018 and December 13, 2018 and captioned Michael Kent et. al v. Electro Scientific Industries, Inc. et al., Christopher Stanley et. al v. Electro Scientific Industries, Inc. et al. and Eduardo Colmenares et. al. v. Electro Scientific Industries, Inc., MKS Instruments, Inc., et al., respectively (collectively with Brian Morris et. al. v. Electro Scientific Industries, Inc. et. al., the “Lawsuits”).

The Lawsuits are purported class actions brought on behalf of former ESI stockholders, asserting various claims against the former members of the ESI board of directors, ESI, the Company and the Company’s merger subsidiary, including breach of fiduciary duty and aiding and abetting the breach of fiduciary duty. The Lawsuits allege that the consideration paid to the ESI shareholders did not appropriately value ESI, and that merger related disclosures failed to disclose certain material information regarding the merger. The Lawsuits purported to seek unspecified damages.

On February 26, 2019, the parties entered into a settlement agreement, pursuant to which plaintiffs dismissed their individual claims with prejudice and class claims without prejudice in return for ESI’s previous supplemental merger related disclosures in connection with the transaction. ESI provided supplemental merger related disclosures to eliminate the burden and expense of litigation and to avoid any possible disruption to the merger that could result from further litigation.

33

MKS INSTRUMENTS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

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 our results of operations, financial condition or cash flows.

34

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS.

This Quarterly Report on Form 10-Q contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). When used herein, the words “believes,” “anticipates,” “plans,” “expects,” “estimates,” “would,” “will,” “intends” and similar expressions are intended to identify forward-looking statements. These forward-looking statements reflect management’s current opinions and are subject to certain risks and uncertainties that could cause results to differ materially from those stated or implied. While we may elect to update forward looking statements in the future, we specifically disclaim any obligation to do so even if our estimates or expectations change. Risks and uncertainties include, but are not limited to those discussed in our Annual Report on Form 10-K for the year ended December 31, 2018 in the section entitled “Risk Factors” as referenced in Part II, Item 1A “Risk Factors” of this Quarterly Report on Form 10-Q.

Overview

We are a global provider of instruments, subsystems and process control solutions that measure, monitor, deliver, analyze, power and control critical parameters of advanced manufacturing processes to improve process performance and productivity for our customers. Our products are derived from our 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, power, reactive gas generation, vacuum technology, lasers, photonics, sub-micron positioning, vibration control, optics and laser-based manufacturing solutions. We also provide services relating to the maintenance and repair of our products, installation services and training. Our primary served markets include semiconductor, industrial technologies, life and health sciences, research and defense.

Acquisition of Electro Scientific Industries, Inc.

On February 1, 2019, we completed our acquisition of Electro Scientific Industries, Inc. (“ESI”) pursuant to an Agreement and Plan of Merger, dated as of October 29, 2018 (the “ESI Merger”). At the effective time of the ESI Merger and pursuant to the terms and conditions of the merger agreement, each share of ESI’s common stock that was issued and outstanding immediately prior to the effective time of the ESI Merger was converted into the right to receive $30.00 in cash, without interest and subject to deduction of any required withholding tax. We paid the former ESI stockholders aggregate consideration of approximately $1.033 billion, excluding related transaction fees and expenses, and non-cash consideration related to the exchange of share-based awards of approximately $31 million for a total purchase consideration of approximately $1.063 billion. We funded the payment of the aggregate consideration with a combination of our available cash on hand and the proceeds from our senior secured term loan facility as described below.

Segments and Markets

Effective February 1, 2019, in conjunction with our acquisition of ESI, we created a third reportable segment known as the Equipment & Solutions segment in addition to our existing two reportable segments: the Vacuum & Analysis segment and the Light & Motion segment. ESI provides laser-based manufacturing solutions for the micro-machining industry that enable customers to optimize production. ESI’s primary served markets include flexible and rigid PCB processing/fabrication, semiconductor wafer processing and passive component manufacturing and testing. ESI solutions incorporate specialized laser technology and proprietary control software to efficiently process the materials and components that are an integral part of electronic devices and systems.

The Vacuum & Analysis segment provides a broad range of instruments, components and subsystems which are derived from our 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 our core competencies in lasers, photonics, sub-micron positioning, vibration control, and optics.

We have a diverse base of customers. Approximately 52% and 43% of our net revenues for the three months ended March 31, 2019 and 2018, respectively, were from advanced manufacturing applications. These include, but are not limited to, industrial technologies, life and health sciences, and research and defense.

Approximately 48% and 57% of our net revenues for the three months ended March 31, 2019 and 2018, respectively, were from sales to semiconductor capital equipment manufacturers and semiconductor device manufacturers.

Net revenues from customers in our advanced markets, which exclude semiconductor capital equipment and semiconductor device product applications, increased by $2.5 million, or 1%, for the three months ended March 31, 2019, compared to the same period in the prior year, primarily due to an increase of $28.6 million from our Equipment & Solutions segment as a result of the ESI Merger, which included two months of revenue from customers in our advanced markets for the quarter. This increase was offset by a decrease of $15.1 million and $11.0 million in revenue from customers in our advanced markets in our Vacuum & Analysis and Light & Motion segments, respectively.

35

Net revenues from semiconductor capital equipment manufacture and semiconductor device manufacture customers decreased by $93.2 million, or 30%, for the three months ended March 31, 2019, compared to the same period in the prior year. This decrease was comprised of a decrease in net semiconductor revenues of $98.8 million and $1.0 million in the Vacuum & Analysis and Light & Motion segments, respectively, offset by an increase of $6.6 million from our Equipment & Solutions segment as a result of the ESI Merger, which included two months of revenue from semiconductor customers for the quarter.

The semiconductor capital equipment industry has been experiencing a moderation in capital spending in the near term and we have seen a similar effect on our semiconductor revenue in the first quarter and expect that to continue into the second quarter. The semiconductor capital equipment industry is subject to rapid demand shifts, which are difficult to predict, and we cannot be certain as to the timing or extent of future demand or any future weakness in the semiconductor capital equipment industry.

A significant portion of our net revenues is from sales to customers in international markets. For the three months ended March 31, 2019 and 2018, international net revenues accounted for approximately 52% and 50% of our total net revenues. A significant portion of our international net revenues was from Japan, Germany, China, South Korea and Israel. We expect that international net revenues will continue to represent a significant percentage of our total net revenues. Long-lived assets located in the United States were $198.7 million and $146.7 million, as of March 31, 2019 and December 31, 2018, respectively, excluding goodwill and intangibles, and long-term tax-related accounts. Long-lived assets located outside of the United States were $87.5 million and $77.4 million, as of March 31, 2019 and December 31, 2018, respectively, excluding goodwill and intangibles, and long-term tax-related accounts.

Critical Accounting Policies and Estimates

The preparation of our consolidated financial statements and related disclosures in conformity with accounting principles generally accepted in the United States requires management to make judgments, assumptions and estimates that affect the amounts reported. There have been no material changes in our critical accounting policies since December 31, 2018, other than the adoption of ASC 842 as outlined below.

Leases

In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”), Leases, (“ASU 2016-02”), to enhance the transparency and comparability of financial reporting related to leasing arrangements. We adopted ASU 2016-02 on January 1, 2019, or the effective date, and used the effective date as our date of initial application.

At the inception of an arrangement, we determine whether the arrangement is or contains a lease based on the facts and circumstances present. Most leases with a term greater than one year are recognized on the balance sheet as right-of-use assets, short-term lease liabilities and long-term lease liabilities. We have elected not to recognize on the balance sheet leases with terms of one year or less. Operating lease liabilities and their corresponding right-of-use assets are recorded based on the present value of lease payments over the expected remaining fixed lease term. Certain adjustments to the right-of-use asset may be required for items such as incentives received. In calculating the present value of future lease payments, we utilize our incremental borrowing rates, which are the rates incurred to borrow on a collateralized basis over a similar term an amount equal to the lease payments in a similar economic environment. We have elected to utilize a single blended interest rate based on currencies, geographies and lease terms that comprise the lease portfolio.

Although separation of lease and non-lease components is required, certain practical expedients are available. Entities may elect the practical expedient to not separate lease and non-lease components. We have elected to account for the lease and non-lease components of each of our operating leases as a single lease component and allocate all of the contract consideration to the lease component only. The lease component results in an operating right-of-use asset being recorded on the balance sheet and amortized on a straight-line basis as lease expense.

Many of our leases contain options to renew and extend lease terms, and options to terminate leases early. We do not recognize the right-of-use asset or lease liability for renewal or termination periods unless we are reasonably certain to exercise the option at lease inception.

For further information about our critical accounting policies, including our revenue recognition policy, please see the discussion of critical accounting policies in our Annual Report on Form 10-K for the year ended December 31, 2018 in the section captioned “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Critical Accounting Policies and Estimates.”

36

Results of Operations

The following table sets forth for the periods indicated the percentage of total net revenues of certain line items included in our consolidated statements of operations and comprehensive income data.

	Three Months Ended March 31,
	2019			2018
Net revenues:
Product		85.7	%		89.6	%
Services		14.3			10.4
Total net revenues		100.0			100.0
Cost of revenues:
Cost of product revenues		49.6			47.2
Cost of service revenues		7.7			5.4
Total cost of revenues (exclusive of amortization shown separately below)		57.3			52.6
Gross profit		42.7			47.4
Research and development		8.4			6.3
Selling, general and administrative		17.8			15.0
Fees and expenses related to incremental term loan		1.2			—
Acquisition and integration costs		6.5			—
Restructuring		—			0.2
Customer contract obligation		0.4			—
Environmental costs		—			0.2
Amortization of intangible assets		3.4			2.0
Income from operations		5.0			23.7
Interest income		0.4			0.2
Interest expense		2.0			1.0
Other expense, net		0.1			—
Income from operations before income taxes		3.3			22.9
Provision for income taxes		0.6			3.9
Net income		2.7	%		19.0	%

Net Revenues

	Three Months Ended March 31,
(dollars in millions)	2019		2018
Product	$	397.4	$	496.7
Service		66.2		57.6
Total net revenues	$	463.6	$	554.3

Product revenues decreased $99.3 million during the three months ended March 31, 2019, compared to the same period in the prior year, due to a decrease in net product revenues from our semiconductor customers of $92.5 million and a decrease in net product revenues from customers in our advanced markets of $6.8 million. The decrease in product revenues from semiconductor customers for the MKS business, excluding the impact of the ESI Merger (the “legacy MKS business”) was $99.1 million, offset by an increase in product revenue from our semiconductor customers of $6.6 million from the Equipment & Solutions segment as a result of the ESI Merger, which included two months of product revenue for the quarter. The decrease in product revenues from customers in advanced markets for the legacy MKS business was $26.2 million, offset by an increase in product revenue from customers in advanced markets of $19.4 million from the Equipment & Solutions segment as a result of the ESI Merger, which included two months of product revenue for the quarter.

Service revenues consisted mainly of fees for services related to the maintenance and repair of our products, sales of spare parts, and installation and training. Service revenues increased $8.6 million during the three months ended March 31, 2019 compared to the same period in the prior year. This increase was primarily attributed to an increase in service revenues from customers in our advanced markets of $9.2 million from the Equipment & Solutions segment as a result of the ESI Merger, which included two months of service revenue for the quarter.

37

Total international net revenues, including product and service, were $239.2 million and $277.6 million for the three months ended March 31, 2019, compared to the same period in the prior year. This decrease of $38.4 million for the three months ended March 31, 2019 was primarily due to decreases in net revenues in North America.

The following table sets forth our net revenues by reportable segment:

	Three Months Ended March 31,
(dollars in millions)	2019		2018
Net revenues:
Vacuum & Analysis	$	234.4	$	348.4
Light & Motion		194.0		205.9
Equipment & Solutions		35.2		—
Total net revenues	$	463.6	$	554.3

Net revenues from our Vacuum & Analysis segment decreased $114.0 million for the three months ended March 31, 2019, compared to the same period in the prior year, due to decreases in net revenues from semiconductor customers of $98.8 million and a decrease in net revenues from customers in our advanced markets of $15.2 million, primarily from customers in our industrial technologies market.

Net revenues from our Light & Motion segment decreased $11.9 million for the three months ended March 31, 2019, compared to the same period in the prior year. The decrease was primarily attributed to a decrease in net revenues from customers in our advanced markets of $11.0 million, primarily from customers in our life and health sciences market. The remainder of the decrease was attributed to a decrease in net revenues from semiconductor customers of $0.9 million.

Gross Profit

	Three Months Ended March 31,
	2019			2018			% Points Change
Gross profit as a percentage of net revenues:
Product		42.2	%		47.4	%		(5.2	)%
Service		46.0			47.7			(1.7	)
Total gross profit		42.7	%		47.4	%		(4.7	)%

Gross profit as a percentage of net product revenues decreased by 5.2 percentage points for the three months ended March 31, 2019, compared to the same period in the prior year, primarily due lower revenue volumes and lower factory utilization.

Gross profit as a percentage of net service revenues decreased by 1.7 percentage points for the three months ended March 31, 2019, compared to the same period in the prior year, primarily due to unfavorable product mix partially offset by favorable absorption.

The following table sets forth gross profit as a percentage of net revenues by reportable segment:

	Three Months Ended March 31,
	2019			2018			% Points Change
Gross profit as a percentage of net revenues:
Vacuum & Analysis		41.7	%		45.5	%		(3.8	)%
Light & Motion		47.8			50.7			(2.9	)
Equipment & Solutions		20.6			—			100.0
Total gross profit		42.7	%		47.4	%		(4.7	)%

38

Gross profit for our Vacuum & Analysis segment decreased by 3.8 percentage points for the three months ended March 31, 2019, compared to the same period in the prior year, primarily due to lower revenue volumes.

Gross profit for our Light & Motion segment decreased by 2.9 percentage points for the three months ended March 31, 2019, compared to the same period in the prior year, primarily due to lower revenue volumes, unfavorable mix and lower factory utilization.

Gross profit for our Equipment & Solutions segment of 20.6% for the three months ended March 31, 2019, is lower than normal partly due to the amortization of the inventory step-up adjustment to fair value from purchase accounting of $5.1 million. Excluding this adjustment, the gross margin would have been 35.1%.

Research and Development

	Three Months Ended March 31,
(dollars in millions)	2019		2018
Research and development expenses	$	38.9	$	34.9

Research and development expenses increased $4.0 million for the three months ended March 31, 2019, compared to the same period in the prior year, primarily due to the ESI Merger, which included $2.4 million of compensation related expenses, $0.7 million of project materials, $0.5 million of depreciation expense and $0.4 million of occupancy costs.

Our research and development efforts are primarily focused on developing and improving our instruments, components, subsystems and process control solutions to improve process performance and productivity.

We have thousands of products, and our research and development efforts primarily consist of a large number of projects related to these products, none of which is individually material to us. Current projects typically have durations of 3 to 30 months depending upon whether the product is an enhancement of existing technology or a new product. Our current initiatives include projects to enhance the performance characteristics of older products, to develop new products and to integrate various technologies into subsystems. These projects support in large part the transition in the semiconductor industry to smaller integrated circuit geometries and in the flat panel display and solar markets to larger substrate sizes, which require more advanced process control technology. Research and development expenses consist primarily of salaries and related expenses for personnel engaged in research and development, fees paid to consultants, material costs for prototypes and other expenses related to the design, development, testing and enhancement of our products.

We believe that the continued investment in research and development and ongoing development of new products are essential to the expansion of our markets. We expect to continue to make significant investment in research and development activities. We are subject to risks from products not being developed in a timely manner, as well as from rapidly changing customer requirements and competitive threats from other companies and technologies. Our success primarily depends on our products being designed into new generations of equipment for the semiconductor industry and advanced technology markets. We develop products that are technologically advanced so that they are positioned to be chosen for use in each successive generation of semiconductor capital equipment. If our products are not chosen to be designed into our customers’ products, our net revenues may be reduced during the lifespan of those products.

Selling, General and Administrative

	Three Months Ended March 31,
(dollars in millions)	2019		2018
Selling, general and administrative expenses	$	82.5	$	82.9

Selling, general and administrative expenses decreased by $0.4 million for the three months ended March 31, 2019, compared to the same period in the prior year. This decrease was primarily attributed to a decrease of $7.4 million related to the legacy MKS business, which included a decrease of $5.9 million of compensation related expenses and $1.6 million of commissions expense. This decrease was offset by an increase of $7.0 million related to the ESI Merger, which included $4.1 million in compensation related expenses, $0.9 million of depreciation expense, $0.5 million of consulting and professional fees and $0.4 million of commissions expense.

39

Fees and Expenses Related to Incremental Term Loan Facility

	Three Months Ended March 31,
(dollars in millions)	2019		2018
Fees and expenses related to incremental term loan	$	5.8	$	—

We recorded fees and expenses related to Amendment No. 5 to our senior secured term loan facility, as described below, which related to the ESI Merger, during the three months ended March 31, 2019.

Acquisition and Integration Costs

	Three Months Ended March 31,
(dollars in millions)	2019		2018
Acquisition and integration costs	$	30.2	$	—

We recorded acquisition and integration costs related to the ESI Merger, which closed on February 1, 2019, during the three months ended March 31, 2019. These costs consisted primarily of compensation costs for certain executives from ESI who had change in control provisions in their respective ESI employment agreements that were accounted for as dual-trigger arrangements and other stock vesting accelerations, as well as consulting and professional fees associated with the ESI Merger.

Restructuring

	Three Months Ended March 31,
(dollars in millions)	2019		2018
Restructuring	$	0.2	$	1.2

We recorded restructuring costs during the three months ended March 31, 2019, which were primarily comprised of severance costs related to the consolidation of certain functions in Asia. We recorded restructuring costs during the three months ended March 31, 2018, primarily comprised of severance costs related to streamlining and consolidating certain administrative functions.

Customer Contract Obligation

	Three Months Ended March 31,
(dollars in millions)	2019		2018
Customer contract obligation	$	1.7	$	—

We recorded a charge during the three months ended March 31, 2019 related to a contractual obligation we acquired as part of our acquisition of Newport Corporation (the “Newport Merger”).

Environmental Costs

	Three Months Ended March 31,
(dollars in millions)	2019		2018
Environmental costs	$	—	$	1.0

We recorded $1.0 million of environmental costs during the first quarter of 2018 related to a U.S. Environmental Protection Agency-designated Superfund site acquired as part of the Newport Merger.

Amortization of Intangible Assets

	Three Months Ended March 31,
(dollars in millions)	2019		2018
Amortization of intangible assets	$	15.7	$	11.2

Amortization of intangible assets increased by $4.5 million during the three months ended March 31, 2019 primarily due to the amortization of intangible assets acquired as part of the ESI Merger.

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Interest Expense, Net

	Three Months Ended March 31,
(dollars in millions)	2019		2018
Interest expense, net	$	7.4	$	4.3

Interest expense, net, increased by $3.1 million for the three months ended March 31, 2019, primarily due to two months of interest expense related to Amendment No. 5 to our senior secured term loan facility, as described below.

Other Expense, Net

	Three Months Ended March 31,
(dollars in millions)	2019		2018
Other expense, net	$	0.3	$	0.6

The changes in other expense, net, for the three months ended March 31, 2019, primarily related to changes in foreign exchange rates.

Provision for Income Taxes

	Three Months Ended March 31,
(dollars in millions)	2019		2018
Provision for income taxes	$	2.9	$	21.6

Our effective tax rates for the periods ended March 31, 2019 and 2018 were 18.8% and 17.1%, respectively. Our effective tax rate for the three months ended March 31, 2019 and the related income tax expense, was lower than the U.S. statutory tax rate due to the U.S. deduction for foreign derived intangible income, the U.S. credit for research activities and the geographic mix of income earned by the international subsidiaries being taxed at rates lower than the U.S. statutory tax rate, offset by the global intangible low-taxed income inclusion, the limitation on the deduction of executive compensation and state income taxes. The geographic mix of income is significantly impacted by acquisition and integration costs, and additional interest expense incurred in the U.S. jurisdiction as a result of the acquisition of ESI.

Our effective tax rate for the three months ended March 31, 2018 was lower than the U.S. statutory tax rate mainly due to foreign income being taxed at rates lower than the U.S. statutory tax rate, windfall benefits of stock compensation and the deduction for foreign derived intangible income offset by the tax effects from global intangible low-taxed income and state income taxes.

As of March 31, 2019, the total amount of gross unrecognized tax benefits, which excludes interest and penalties, was approximately $40.7 million. At December 31, 2018, the total amount of gross unrecognized tax benefits, which excludes interest and penalties, was approximately $32.7 million. The net increase is primarily attributable the addition of historical gross unrecognized tax benefits for ESI as a result of the ESI Merger during the quarter ended March 31, 2019. As of March 31, 2019, excluding interest and penalties, there were approximately $33.1 million of net unrecognized tax benefits that, if recognized, would impact our annual effective tax rate. We accrue interest and, if applicable, penalties for any uncertain tax positions. Interest and penalties are classified as a component of income tax expense. As of March 31, 2019 and December 31, 2018, the Company had accrued interest on unrecognized tax benefits of approximately $0.5 million and $0.6 million, respectively.    

Over the next 12 months it is reasonably possible that we may recognize approximately $1.5 million of previously net unrecognized tax benefits, excluding interest and penalties, related to federal, state and foreign tax positions as a result of the expiration of statutes of limitation. The U.S. statute of limitations remains open for tax years 2015 through present. The statute of limitations for our tax filings in other jurisdictions varies between fiscal years 2013 through the 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.

We are subject to examination by U.S. federal, state and foreign tax authorities. The U.S. Internal Revenue Service commenced an examination of the Company’s U.S. federal income tax filings for tax years 2015 and 2016 during the quarter ended September 30, 2017. This audit was effectively settled during the quarter ended March 31, 2018, and the impact was not material. Also during the quarter ended March 31, 2018, we received notification from the U.S. Internal Revenue Service of their intent to audit our U.S. subsidiary, Newport Corporation, for tax year 2015. This audit commenced during the quarter ended June 30, 2018 and there have been no proposed adjustments through March 31, 2019.

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On a quarterly basis, we evaluate both positive and negative evidence that affects the realizability of net deferred tax assets and assess the need for a valuation allowance. The future benefit to be derived from our deferred tax assets is dependent upon our ability to generate sufficient future taxable income in each jurisdiction of the right type to realize the assets.

Our future effective tax rate depends on various factors, including further interpretations and guidance from U.S. federal and state governments on the impact of the enactment of the Tax Cuts and Jobs Act, the adoption of the proposed regulations issued by the U.S. Internal Revenue Service on the foreign derived intangible income and global intangible low-taxed income provisions, as well as the geographic composition of our pre-tax income, and changes in income tax reserves for unrecognized tax benefits. We monitor these factors and timely adjust our estimates of the effective tax rate accordingly. We expect that the geographic mix of pre-tax income will continue to have a favorable impact on our effective tax rate, however the geographic mix of pre-tax income can change based on multiple factors resulting in changes to the effective tax rate in future periods. While we believe we have adequately provided for all tax positions, amounts asserted by taxing authorities could materially differ from our accrued positions as a result of uncertain and complex application of tax law and regulations. Additionally, the recognition and measurement of certain tax benefits include estimates and judgment by management. Accordingly, we could record additional provisions or benefits for U.S. federal, state, and foreign tax matters in future periods as new information becomes available.

Liquidity and Capital Resources

Cash and cash equivalents and short-term marketable investments totaled $462.3 million at March 31, 2019, compared to $718.2 million at December 31, 2018. This decrease primarily related to the $406.0 million of cash used to fund the payment of a portion of the purchase price for ESI on February 1, 2019.

Net cash provided by operating activities was $29.1 million for the three months ended March 31, 2019 and resulted from net income of $12.5 million, which included non-cash charges of $61.6 million, offset by a net increase in working capital of $45.0 million. The net increase in working capital was primarily due to a decrease in accrued compensation of $22.9 million, a decrease in accounts payable of $17.3 million, an increase in inventories of $10.3 million and a decrease in income taxes of $3.7 million, partially offset by a decrease in other current and non-current assets of $4.8 million and a decrease in accounts receivable of $4.0 million.

Net cash provided by operating activities was $72.7 million for the three months ended March 31, 2018 and resulted from net income of $105.1 million, which included non-cash charges of $37.9 million, offset by a net increase in working capital of $70.3 million. The net increase in working capital was primarily due to an increase in accounts receivable of $37.3 million and an increase in inventories of $28.2 million, related to an increase in business activities and a decrease in accrued compensation of $32.5 million, as year-end bonuses were paid. These increases in working capital were offset by an increase in other current and non-current liabilities of $10.5 million, an increase in accounts payable of $9.3 million and an increase in income taxes of $8.8 million.

Net cash used in investing activities was $874.1 million for the three months ended March 31, 2019 and was primarily due to the payment of a portion of the purchase price for the ESI Merger of $988.6 million and purchases of production-related equipment of $14.5 million, partially offset by net sales and maturities of short-term investments of $129.0 million. Net cash used in investing activities was $0.6 million for the three months ended March 31, 2018 due to purchases of production-related equipment of $9.4 million, offset by net sales and maturities of short-term investments of $8.8 million.

Net cash provided by financing activities was $618.6 million for the three months ended March 31, 2019 and was primarily from net proceeds of $638.6 million mainly from our 2019 Incremental Term Loan Facility, as described below, used to finance the ESI Merger, partially offset by net payments related to tax payments for employee stock awards of $9.0 million and dividend payments of $10.8 million. Net cash used in financing activities was $67.1 million for the three months ended March 31, 2018 and resulted from partial repayment of the Term Loan Facility, as described below, of $50.0 million, dividend payments made to common stockholders of $9.8 million and net payments related to tax payments for employee stock awards of $8.9 million, partially offset by a net increase in proceeds from short-term borrowings relating to our lines of credit of $1.6 million.

On July 25, 2011, our Board of Directors approved a share repurchase program for the repurchase of up to an aggregate of $200 million of our outstanding common stock from time to time in open market purchases, privately negotiated transactions or through other appropriate means. The timing and quantity of any shares repurchased depends upon a variety of factors, including business conditions, stock market conditions and business development activities, including but not limited to merger and acquisition opportunities. These repurchases may be commenced, suspended or discontinued at any time without prior notice. We have repurchased approximately 2,588,000 shares of common stock for approximately $127 million pursuant to the program since its adoption. During the three months ended March 31, 2019 and 2018, there were no repurchases of common stock.

Holders of our common stock are entitled to receive dividends when and if they are declared by our Board of Directors. In addition, we accrue dividend equivalents on the RSUs we assumed in the ESI Merger when dividends are declared by the Company’s Board of Directors. Our Board of Directors declared a cash dividend of $0.20 per share during the first quarter of 2019, which totaled $10.8 million. Our Board of Directors declared a cash dividend of $0.18 per share during the first quarter of 2018, which totaled $9.8 million.

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On May 8, 2019, our Board of Directors declared a quarterly cash dividend of $0.20 per share to be paid on June 7, 2019 to shareholders of record as of May 27, 2019. Future dividend declarations, if any, as well as the record and payment dates for such dividends, are subject to the final determination of our Board of Directors. In addition, under the terms of our senior secured Term Loan Facility and our senior secured asset-based revolving credit facility, we may be restricted from paying dividends under certain circumstances.

Term Loan Credit Agreement

In connection with the completion of the Newport Merger, we 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 in the original principal amount of $780.0 million (the “2016 Term Loan Facility”), subject to increase at our option and subject to the receipt of lender commitments in accordance with the Credit Agreement (the 2016 Term Loan Facility, together with the 2019 Incremental Term Loan Facility (as defined below), the “Term Loan Facility”). The 2016 Term Loan Facility matures on April 29, 2023. 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; 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. We have elected the interest rate as described in clause (b). The Credit Agreement provides that, unless an alternate rate of interest is agreed, all loans will be determined by reference to the Base Rate if the LIBOR rate cannot be ascertained, if regulators impose material restrictions on the authority of a lender to make LIBOR rate loans, or for other reasons. The 2016 Term Loan Facility was issued with original issue discount of 1.00% of the principal amount thereof.

We subsequently entered into four separate repricing amendments to the 2016 Term Loan Facility, which decreased the applicable margin for LIBOR borrowings from 4.0% to 1.75%, with a LIBOR rate floor of 0.75%. As a consequence of the pricing of the 2019 Incremental Term Loan Facility (defined below), the applicable margin for the 2016 Term Loan Facility was increased to 2.00% (from 1.75%) with respect to LIBOR borrowings and 1.00% (from 0.75%) with respect to base rate borrowings. The interest rate on the 2016 Term Loan Facility as of March 31, 2019 was 4.5%.

In September 2016, we entered into an interest rate swap agreement, which has a maturity date of September 30, 2020, to fix the rate on $335.0 million of the then-outstanding balance under the 2016 Term Loan Facility. The rate is fixed at 1.198% per annum plus the applicable credit spread, which was 2.0% at March 31, 2019. The notional amount of the interest rate swap agreement was $290.0 million and had a fair value of $4.5 million at March 31, 2019.

As of March 31, 2019, after total principal prepayments of $425.0 million and regularly scheduled principal payments of $6.5 million, the total outstanding principal balance of the 2016 Term Loan Facility was $348.5 million. As a result of making these prepayments, we are no longer required to make any regularly scheduled principal payments on the 2016 Term Loan Facility until the maturity date of the loan.

We incurred $28.7 million of deferred finance fees, original issue discount and repricing fees related to the term loans under the 2016 Term Loan Facility, which are included in long-term debt in the accompanying consolidated balance sheets and are being amortized to interest expense over the estimated life of the term loans using the effective interest method. A portion of these fees have been accelerated in connection with the various debt prepayments during 2016, 2017 and 2018. As of March 31, 2019, the remaining balance of the deferred finance fees, original issue discount and repricing fees related to the 2016 Term Loan Facility was $4.0 million.

On February 1, 2019, in connection with the completion of the ESI Merger, we entered into an amendment (“Amendment No. 5”) to the Credit Agreement. Amendment No. 5 provided an additional tranche B-5 term loan commitment in the principal amount of $650.0 million (the “2019 Incremental Term Loan Facility”), all of which was drawn down in connection with the closing of the ESI Merger. Pursuant to Amendment No. 5, we also effectuated certain amendments to the Credit Agreement which make certain of the negative covenants and other provisions less restrictive. The 2019 Incremental Term Loan Facility matures on February 1, 2026 and bears interest at a rate per annum equal to, at our option, a base rate or LIBOR rate (as described above) plus, in each case, an applicable margin equal to 1.25% with respect to base rate borrowings and 2.25% with respect to LIBOR borrowings. The 2019 Incremental Term Loan Facility was issued with original issue discount of 1.00% of the principal amount thereof.

On April 3, 2019, we entered into an interest rate swap agreement, which has a maturity date of March 31, 2023, to fix the rate on $300.0 million of the outstanding balance of the 2019 Incremental Term Loan Facility. The rate is fixed at 2.309% per annum plus the applicable credit spread, which was 2.25% at March 31, 2019.

We incurred $11.4 million of deferred finance fees and original issue discount fees related to the term loans under the 2019 Incremental Term Loan Facility, which are included in long-term debt in the accompanying consolidated balance sheets and are being amortized to interest expense over the estimated life of the term loans using the effective interest method. As of March 31, 2019, the remaining balance of the deferred finance fees and original issue discount related to the 2019 Incremental Term Loan Facility was $11.2 million.

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We are required to make scheduled quarterly payments each equal to 0.25% of the original principal amount of the 2019 Incremental Term Loan Facility, with the balance due on February 1, 2026. If on or prior to the date that is six months after the closing date of Amendment No. 5, we prepay any loans under the 2019 Incremental Term Loan Facility in connection with a repricing transaction, we must pay a prepayment premium of 1.00% of the aggregate principal amount of the loans so prepaid. At March 31, 2019, the total balance outstanding of the 2019 Incremental Term Loan Facility was $650.0 million, and the interest rate was 4.7%.

Under the Credit Agreement, we are required to prepay outstanding term loans under the 2016 Term Loan Facility and the 2019 Incremental Term Loan Facility, 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. As a result of our Total Leverage Ratio, we were not required to make a prepayment of excess cash flow for the fiscal year ended December 31, 2018.

All obligations under the Term Loan Facility are guaranteed by certain of our domestic subsidiaries, and are collateralized by substantially all of our 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 March 31, 2019, we were 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 in April 2016, we 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, that provided senior secured financing of up to $50.0 million, which we never borrowed against. On February 1, 2019, in connection with the completion of the ESI Merger, we terminated the $50.0 million asset-based credit agreement with Deutsche Bank AG New York Branch and entered into an asset-based credit agreement with Barclays Bank PLC, 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 Credit Agreement”), that provides senior secured revolving credit financing of up to $100.0 million, subject to a borrowing base limitation (the “ABL Facility”). The borrowing base for the ABL Facility at any time equals the sum of: (a) 85% of certain eligible accounts; plus (b) prior to certain notice and filed examination and appraisal requirements, the lesser of (i) 20% of net book value of eligible inventory in the United States and (ii) 30% of the borrowing base, and after the satisfaction of such 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. The ABL Facility includes borrowing capacity in the form of letters of credit up to $25.0 million.

Borrowings under the ABL Facility bear interest at a rate per annum equal to, at our option, any of the following, plus, in each case, an applicable margin: (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 0.00%; 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, with a floor of 0.00%. The initial applicable margin for borrowings under the ABL Facility is 0.50% with respect to base rate borrowings and 1.50% with respect to LIBOR borrowings. 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.

In addition to paying interest on any outstanding principal under the ABL Facility, we are required to pay a commitment fee in respect of the unutilized commitments thereunder equal to 0.25% per annum. We must also pay customary letter of credit fees and agency fees.

We incurred $0.8 million of costs in connection with the new ABL Facility, which were capitalized and included in other assets in the accompanying consolidated balance sheet and are being amortized to interest expense over the contractual term of five years of the ABL Facility. As a result of the prior asset-based facility being terminated, we wrote off $0.2 million of previously capitalized debt issuance costs.

The ABL Credit Agreement also contains customary representations and warranties, affirmative covenants and provisions relating to events of default. If an event of default occurs, the lenders under the ABL Facility will be entitled to take various actions, including the acceleration of amounts due under the ABL Facility and all actions permitted to be taken by a secured creditor.

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Off-Balance Sheet Arrangements

We do not have any financial partnerships with unconsolidated entities, such as entities often referred to as structured finance, special purpose entities or variable interest entities, which are often established for the purpose of facilitating off-balance sheet arrangements or for other contractually narrow or limited purposes. Accordingly, we have no off-balance sheet arrangements that have or are reasonably expected to have a current or future effect on our financial condition, changes in financial condition, revenues or expenses, results of operations, liquidity, capital expenditures or capital resources that are material to investors.

Contractual Obligations

Other than the 2019 Incremental Term Loan Facility for $650.0 million and ABL Facility described above, there have been no other changes outside the ordinary course of business to our contractual obligations as disclosed in our Annual Report on Form 10-K for the year ended December 31, 2018.

Recently Issued Accounting Pronouncements

In October 2018, the FASB issued ASU 2018-16, “Derivatives and Hedging (Topic 815).” This standard permits the use of the Overnight Index Swap Rate (“OIS”) based on the Secured Overnight Financing Rate as a U.S. benchmark interest rate for hedge accounting purposes under Topic 815 in addition to the interest rates on direct treasury obligations of the U.S. government, the LIBOR swap rate, the OIS rate based on the Federal Funds Effective Rate and the Securities Industry and Financial Markets Association Municipal Swap Rate. This standard is effective for annual periods beginning after December 15, 2018, including interim periods within those fiscal years. We adopted this ASU during the first quarter of 2019 and the adoption of this ASU did not have a material impact on our consolidated financial statements.

In August 2018, the FASB issued ASU 2018-15, “Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract.” This standard aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments to this update. This standard is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years. We do not expect adoption of this ASU to have a material impact on our consolidated financial statements.

In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815).” This standard better aligns an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. The provisions of this ASU are effective for annual periods beginning after December 15, 2018, including interim periods within those fiscal years. We adopted this ASU during the first quarter of 2019 and the adoption of this ASU did not have a material impact on our consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases. This standard requires the recognition of lease assets and liabilities for all leases, with certain exceptions, on the balance sheet. This ASU is effective for annual periods beginning after December 15, 2018, including interim periods within those fiscal years. We adopted ASU 2016-02 on January 1, 2019, and used the effective date as its date of initial application. As such, we did not adjust prior period amounts. We also elected to adopt the package of practical expedients upon transition, which permits companies to not reassess lease identification, classification, and initial direct costs under ASU 2016-02 for leases that commenced prior to the effective date. We implemented internal controls and a lease accounting information system to enable preparation on adoption. Upon adoption, we recorded a cumulative effect of initially applying this new standard, resulting in the addition of $71.0 million of right-of-use assets and $20.2 million and $54.1 million of corresponding short-term and long-term lease liabilities, respectively. The right-of-use asset is net of the deferred rent liability, prepaid rent and net favorable lease asset which were re-classified to the right-of-use asset upon adoption of the standard. For additional information on the required disclosures related to the impact of adopting this standard, see Note 3 to the Consolidated Condensed Financial Statements.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

Information concerning market risk is contained in the section entitled “Quantitative and Qualitative Disclosures About Market Risk” contained in our Annual Report on Form 10-K for the year ended December 31, 2018 filed with the Securities and Exchange Commission on February 26, 2019. As of March 31, 2019, there were no material changes in our exposure to market risk from December 31, 2018.

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ITEM 4. CONTROLS AND PROCEDURES.

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as of March 31, 2019. The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), means controls and other procedures of an issuer that are designed to ensure that information required to be disclosed by the issuer in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the Securities and Exchange Commission’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by an issuer in the reports that it files or submits under the Exchange Act is accumulated and communicated to the issuer’s management, including its principal executive and principal financial officers, or persons performing similar functions as appropriate to allow timely decisions regarding required disclosure. Management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Based on the evaluation of our disclosure controls and procedures as of March 31, 2019, our Chief Executive Officer and Chief Financial Officer concluded that, as of such date, our disclosure controls and procedures were effective at the reasonable assurance level to ensure that information required to be disclosed by us in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in Securities and Exchange Commission rules and forms and is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer as appropriate to allow timely decisions regarding required disclosure.

Changes in Internal Control over Financial Reporting

There was no change in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the quarter ended March 31, 2019, that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS.

Newport Litigation

In March 2016, two putative class actions lawsuit captioned Dixon Chung v. Newport Corp., et al., Case No. A-16-733154-C, and Hubert C. Pincon v. Newport Corp., et al., Case No. A-16-734039-B, were filed in the District Court, Clark County, Nevada on behalf of a putative class of stockholders of Newport Corporation (“Newport”) for claims related to the merger agreement (“Newport Merger Agreement”) between the Company, Newport, and a wholly-owned subsidiary of the Company (“Merger Sub”). The lawsuits named as defendants the Company, Newport, Merger Sub, and certain then current and former members of Newport’s board of directors. Both complaints alleged that Newport directors breached their fiduciary duties to Newport’s stockholders by agreeing to sell Newport through an inadequate and unfair process, which led to inadequate and unfair consideration, by agreeing to unfair deal protection devices and by omitting material information from the proxy statement. The complaints also alleged that the Company, Newport, and Merger Sub aided and abetted the directors’ alleged breaches of their fiduciary duties. The complaints sought injunctive relief, including to enjoin or rescind the Newport Merger Agreement, and an award of attorneys’ and other fees and costs, among other relief. On April 14, 2016, the Court consolidated the actions.

On October 19, 2016, plaintiffs in the consolidated action filed an amended complaint captioned In re Newport Corporation Shareholder Litigation, Case No. A-16-733154-B, in the District Court, Clark County, Nevada, on behalf of a putative class of Newport’s stockholders for claims related to the Newport Merger Agreement. The amended complaint contained substantially similar allegations related to Newport’s former board of directors’ alleged breaches of their fiduciary duties to Newport’s stockholders. The amended complaint sought monetary damages, including pre- and post-judgment interest. On June 22, 2017, the Court granted Defendants’ motion to dismiss and dismissed the amended complaint against all defendants but granted plaintiffs leave to amend.

On July 27, 2017, plaintiffs filed a second amended complaint containing substantially similar allegations but naming only Newport’s former directors as defendants. On August 8, 2017, the Court dismissed the Company and Newport from the action. The second amended complaint seeks monetary damages, including pre- and post-judgment interest. The Court granted a motion for class certification on September 27, 2018, appointing Mr. Pincon and Locals 302 and 612 of the International Union of Operating Engineers - Employers Construction Industry Retirement Trust as class representatives. On June 11, 2018, plaintiff Dixon Chung was voluntarily dismissed from the litigation. Discovery is ongoing in this action.

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ESI Litigation

On November 29, 2018, a complaint captioned Brian Morris et. al. v. Electro Scientific Industries, Inc. et al. was filed in the U.S. District Court for the District of Oregon by alleged former stockholders of Electro Scientific Industries, Inc. (“ESI”) in connection with the acquisition of ESI by the Company. The complaint named the Company’s subsidiary, ESI, and the former members of ESI’s board of directors as defendants. Five additional complaints were subsequently filed, two in the U.S. District Court for the District of Oregon and three in the Multnomah County Circuit Court in the State of Oregon. The cases filed in the U.S. District Court were dated December 6, 2018 and December 12, 2018 and captioned Melvyn Klein et. al. v. Electro Scientific Industries, Inc. et al. and Donald Mager et. al. v. Electro Scientific Industries, Inc. et al., respectively. The complaints filed in Multnomah County Circuit Court were dated December 5, 2018, December 5, 2018 and December 13, 2018 and captioned Michael Kent et. al v. Electro Scientific Industries, Inc. et al., Christopher Stanley et. al v. Electro Scientific Industries, Inc. et al. and Eduardo Colmenares et. al. v. Electro Scientific Industries, Inc., MKS Instruments, Inc., et al., respectively (collectively with Brian Morris et. al. v. Electro Scientific Industries, Inc. et. al., the “Lawsuits”).

The Lawsuits are purported class actions brought on behalf of former ESI stockholders, asserting various claims against the former members of the ESI board of directors, ESI, the Company and the Company’s merger subsidiary, including breach of fiduciary duty and aiding and abetting the breach of fiduciary duty. The Lawsuits allege that the consideration paid to the ESI shareholders did not appropriately value ESI, and that ESI’s merger related disclosures failed to disclose certain material information regarding the merger. The Lawsuits purport to seek unspecified damages.

On February 26, 2019, the parties entered into a settlement agreement, pursuant to which plaintiffs dismissed their individual claims with prejudice and class claims without prejudice in return for ESI’s previous supplemental merger related disclosures in connection with the transaction. ESI provided supplemental merger related disclosures to eliminate the burden and expense of litigation and to avoid any possible disruption to the merger that could result from further litigation.

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 our results of operations, financial condition or cash flows.

ITEM 1A. RISK FACTORS.

Information regarding risk factors affecting the Company’s business are discussed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 in the section entitled “Risk Factors.” There have been no material changes to the risk factors as described in Part I, Item 1A, “Risk Factors,” in our Annual Report on Form 10-K for the year ended December 31, 2018.

47

ITEM 6. EXHIBITS.

Exhibit No.	Exhibit Description
+3.1(1)	Restated Articles of Organization of the Registrant
+3.2(2)	Articles of Amendment to Restated Articles of Organization of the Registrant, as filed with the Secretary of State of Massachusetts on May  18, 2001
+3.3(3)	Articles of Amendment to Restated Articles of Organization of the Registrant, as filed with the Secretary of State of Massachusetts on May  16, 2002
+3.4(4)	Amended and Restated By-Laws of the Registrant
+10.1(5)	Amendment No.  5 to Term Loan Credit Agreement and Amendment to Term Loan Guaranty and Term Loan Security Agreement, dated as of February  1, 2019, by and among the Registrant, the other loan parties party thereto, Barclays Bank PLC, as administrative agent and collateral agent and each participating lender party thereto
+10.2(5)	ABL Credit Agreement, dated as of February  1, 2019, by and among the Registrant, Barclays Bank PLC, 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
+10.3(6)*	Electro Scientific Industries, Inc.’s 2004 Stock Incentive Plan
+10.4(6)*	Form of Restricted Stock Units Award Agreement (with time-based vesting) used under Electro Scientific Industries, Inc.’s 2004 Stock Incentive Plan for 2016-2017
+10.5(6)*	Form of Restricted Stock Units Award Agreement (with time-based vesting) used under Electro Scientific Industries, Inc.’s 2004 Stock Incentive Plan for 2018
+10.6(6)*	Form of Restricted Stock Units Award Agreement (with performance-based vesting) used under Electro Scientific Industries, Inc.’s 2004 Stock Incentive Plan for 2016-2017
+10.7(6)*	Form of Restricted Stock Units Award Agreement (with performance-based vesting) used under Electro Scientific Industries, Inc.’s 2004 Stock Incentive Plan for 2018
+10.8(6)*	Form of the Registrant’s RSU Assumption Agreement (with time-based vesting) for U.S. Employees Relating to Electro Scientific Industries, Inc.’s 2004 Stock Incentive Plan
+10.9(6)*	Form of the Registrant’s RSU Assumption Agreement (with time-based vesting) for Employees Outside of the United States Relating to Electro Scientific Industries, Inc.’s 2004 Stock Incentive Plan
+10.10(6)*	Form of the Registrant’s RSU Assumption Agreement (with performance-based vesting) for U.S. Employees Relating to Electro Scientific Industries, Inc.’s 2004 Stock Incentive Plan
+10.11(6)*	Form of the Registrant’s RSU Assumption Agreement (with performance-based vesting) for Employees Outside of the United States Relating to Electro Scientific Industries, Inc.’s 2004 Stock Incentive Plan
31.1	Certification of Principal Executive Officer pursuant to Rule 13a-14(a)/Rule 15d-14(a) of the Securities Exchange Act of 1934, as amended
31.2	Certification of Principal Financial Officer pursuant to Rule 13a-14(a)/Rule 15d-14(a) of the Securities Exchange Act of 1934, as amended
32.1	Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

+ Previously filed

* Management contract or compensatory plan arrangement

(1) Incorporated by reference to the Registration Statement on Form S-4 (File No. 333-49738), filed with the Securities and Exchange Commission on November 13, 2000.

(2) Incorporated by reference to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2001 (File No. 000-23621), filed with the Securities and Exchange Commission on August 14, 2001.

48

(3) Incorporated by reference to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2002 (File No. 000-23621), filed with the Securities and Exchange Commission on August 13, 2002.

(4) Incorporated by reference to the Registrant’s Current Report on Form 8-K (File No. 000-23621), filed with the Securities and Exchange Commission on May 6, 2014.

(5) Incorporated by reference to the Registrant’s Current Report on Form 8-K (File No. 000-23621), filed with the Securities and Exchange Commission on February 1, 2019.

(6) Incorporated by reference to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2018 (File No. 000-23621), filed with the Securities and Exchange Commission on February 26, 2019.

49

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	MKS INSTRUMENTS, INC.
Date: May 8, 2019	By:	/s/ Seth H. Bagshaw
		Seth H. Bagshaw
		Senior Vice President, Chief Financial Officer and Treasurer
		(Principal Financial Officer)

50

EX-31.1

EXHIBIT 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

PURSUANT TO RULE 13a-14(a)/RULE 15d-14(a) OF THE

SECURITIES EXCHANGE ACT OF 1934, AS AMENDED

I, Gerald G. Colella, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of MKS Instruments, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 8, 2019	/s/ Gerald G. Colella
	Gerald G. Colella
	Chief Executive Officer
	(Principal Executive Officer)

EX-31.2

EXHIBIT 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER

PURSUANT TO RULE 13a-14(a)/RULE 15d-14(a) OF THE

SECURITIES EXCHANGE ACT OF 1934, AS AMENDED

I, Seth H. Bagshaw, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of MKS Instruments, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 8, 2019	/s/ Seth H. Bagshaw
	Seth H. Bagshaw
	Senior Vice President, Chief Financial Officer and Treasurer
	(Principal Financial Officer)

EX-32.1

EXHIBIT 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of MKS Instruments, Inc. (the “Company”) for the period ended March 31, 2019, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, Gerald G. Colella, Chief Executive Officer of the Company, and Seth H. Bagshaw, Senior Vice President, Chief Financial Officer and Treasurer of the Company, each hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, based on his knowledge:

(1) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: May 8, 2019	/s/ Gerald G. Colella
	Gerald G. Colella
	Chief Executive Officer
Dated: May 8, 2019	/s/ Seth H. Bagshaw
	Seth H. Bagshaw
	Senior Vice President, Chief Financial Officer and Treasurer

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 01, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Trading Symbol	MKSI
Entity Registrant Name	MKS INSTRUMENTS INC
Entity Central Index Key	0001049502
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		54,357,260

XML

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 418,016	$ 644,345
Short-term investments	44,326	73,826
Trade accounts receivable, net of allowance for doubtful accounts of $4,968 and $5,243 at March 31, 2019 and December 31, 2018, respectively	335,990	295,454
Inventories	475,633	384,689
Other current assets	86,387	65,790
Total current assets	1,360,352	1,464,104
Property, plant and equipment, net	251,424	194,367
Right-of-use asset	65,628
Goodwill	1,057,331	586,996
Intangible assets, net	619,091	319,807
Long-term investments	10,350	10,290
Other assets	48,562	38,682
Total assets	3,412,738	2,614,246
Current liabilities:
Short-term debt	10,281	3,986
Accounts payable	95,317	83,825
Accrued compensation	61,523	82,350
Income taxes payable	14,355	16,358
Lease liability	19,459
Deferred revenue and customer advances	21,056	14,246
Other current liabilities	74,568	62,520
Total current liabilities	296,559	263,285
Long-term debt, net	976,823	343,842
Non-current deferred taxes	78,904	48,223
Non-current accrued compensation	60,337	55,598
Non-current lease liability	49,392
Other liabilities	29,862	30,111
Total liabilities	1,491,877	741,059
Commitments and contingencies (Note 19)
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; 54,231,772 and 54,039,554 shares issued and outstanding at March 31, 2019 and December 31, 2018, respectively	113	113
Additional paid-in capital	844,261	793,932
Retained earnings	1,086,409	1,084,797
Accumulated other comprehensive loss	(9,922)	(5,655)
Total stockholders' equity	1,920,861	1,873,187
Total liabilities and stockholders' equity	$ 3,412,738	$ 2,614,246

XML

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 4,968	$ 5,243
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	54,231,772	54,039,554
Common stock, shares outstanding	54,231,772	54,039,554

XML

Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Net revenues:
Net revenues		$ 463,561	$ 554,275
Cost of revenues
Cost of revenues		265,443	291,420
Gross profit		198,118	262,855
Research and development		38,933	34,857
Selling, general and administrative		82,455	82,949
Fees and expenses related to incremental term loan		5,847
Acquisition and integration costs		30,167
Restructuring		223	1,220
Customer contract obligation		1,700
Environmental costs			1,000
Amortization of intangible assets		15,727	11,190
Income from operations		23,066	131,639
Interest income		1,714	1,105
Interest expense		9,119	5,430
Other expense, net		325	572
Income before income taxes		15,336	126,742
Provision for income taxes		2,881	21,621
Net income		12,455	105,121
Other comprehensive income:
Changes in value of financial instruments designated as cash flow hedges, net of tax expense (benefit)	[1]	52	178
Foreign currency translation adjustments, net of tax of $0		(4,268)	10,771
Unrecognized pension loss, net of tax benefit	[2]	(1)	(85)
Unrealized loss on investments, net of tax benefit	[3]	(50)	(59)
Total comprehensive income		$ 8,188	$ 115,926
Net income per share:
Basic		$ 0.23	$ 1.93
Diluted		$ 0.23	$ 1.90
Weighted average common shares outstanding:
Basic		54,147	54,423
Diluted		54,848	55,286
Products [Member]
Net revenues:
Net revenues		$ 397,363	$ 496,677
Cost of revenues
Cost of revenues		229,710	261,321
Services [Member]
Net revenues:
Net revenues		66,198	57,598
Cost of revenues
Cost of revenues		$ 35,733	$ 30,099

[1] Tax expense (benefit) was $15 and ($112) for the three months ended March 31, 2019 and 2018, respectively.

[2] Tax benefit was $21 and $36 for the three months ended March 31, 2019 and 2018, respectively.

[3] Tax benefit was $16 and $17 for the three months ended March 31, 2019 and 2018, respectively.

XML

Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Tax expense (benefit) on changes in value of financial instruments designated as cash flow hedges	$ 15	$ (112)
Tax on foreign currency translation adjustments	0	0
Tax benefit on unrecognized pension loss	21	36
Tax benefit on unrealized loss on investments	$ 16	$ 17

XML

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]
Beginning Balance at Dec. 31, 2017	$ 1,588,907	$ 113	$ 789,644	$ 795,698	$ 3,452
Beginning Balance, Shares at Dec. 31, 2017		54,355,535
Net issuance under stock-based plans	(8,920)		(8,920)
Net issuance under stock-based plans, Shares		136,568
Stock-based compensation	10,426		10,426
Cash dividend	(9,808)			(9,808)
Comprehensive income (net of tax):
Net income	105,121			105,121
Other comprehensive gain	10,805				10,805
Ending Balance at Mar. 31, 2018	1,698,340	$ 113	791,150	892,820	14,257
Ending Balance, Shares at Mar. 31, 2018		54,492,103
Accounting standards codification topic 606 adjustment	1,809			1,809
Beginning Balance at Dec. 31, 2018	1,873,187	$ 113	793,932	1,084,797	(5,655)
Beginning Balance, Shares at Dec. 31, 2018		54,039,554
Net issuance under stock-based plans	22,491		22,491
Net issuance under stock-based plans, Shares		192,218
Stock-based compensation	27,838		27,838
Cash dividend	(10,843)			(10,843)
Comprehensive income (net of tax):
Net income	12,455			12,455
Other comprehensive gain	(4,267)				(4,267)
Ending Balance at Mar. 31, 2019	$ 1,920,861	$ 113	$ 844,261	$ 1,086,409	$ (9,922)
Ending Balance, Shares at Mar. 31, 2019		54,231,772

XML

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Stockholders' Equity [Abstract]
Cash dividend, per common share	$ 0.20	$ 0.18

XML

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 12,455	$ 105,121
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	25,211	20,492
Amortization of inventory step-up adjustment to fair value	5,140
Amortization of debt issuance costs, original issue discount, and soft call premium	1,202	2,019
Stock-based compensation	27,838	10,426
Provision for excess and obsolete inventory	5,063	5,333
(Recovery) provision for doubtful accounts	(440)	335
Deferred income taxes	(2,445)	(705)
Other	66	34
Changes in operating assets and liabilities, net of business acquired:
Trade accounts receivable	4,028	(37,336)
Inventories	(10,327)	(28,177)
Income taxes	(3,653)	8,822
Other current and non-current assets	4,804	(942)
Accrued compensation	(22,957)	(32,531)
Other current and non-current liabilities	359	10,544
Accounts payable	(17,294)	9,321
Net cash provided by operating activities	29,050	72,756
Cash flows used in investing activities:
Acquisition of business, net of cash acquired	(988,599)
Purchases of investments	(44,212)	(49,753)
Maturities of investments	18,684	49,596
Sales of investments	154,489	8,930
Proceeds from sale of assets	35
Purchases of property, plant and equipment	(14,529)	(9,390)
Net cash used in investing activities	(874,132)	(617)
Cash flows provided by (used in) financing activities:
Net proceeds from short and long-term borrowings	638,638	11,907
Payments on short-term borrowings	(176)	(10,274)
Payments on long-term borrowings		(50,000)
Net payments related to employee stock awards	(8,987)	(8,921)
Dividend payments to common stockholders	(10,843)	(9,808)
Net cash provided by (used in) financing activities	618,632	(67,096)
Effect of exchange rate changes on cash and cash equivalents	121	1,958
(Decrease) Increase in cash and cash equivalents and restricted cash	(226,329)	7,001
Cash and cash equivalents at beginning of period	644,345	333,887
Cash and cash equivalents at end of period	$ 418,016	$ 340,888

XML

Basis of Presentation

3 Months Ended

Mar. 31, 2019

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 March 31, 2019, and for the three months ended March 31, 2019 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, 2018 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 and do not include all of the information and note disclosures required by United States generally accepted accounting principles (“U.S. GAAP”). The unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the MKS Annual Report on Form 10-K for the year ended December 31, 2018 filed with the Securities and Exchange Commission on February 26, 2019.

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 basis, management evaluates its estimates and judgments, including those related to revenue recognition, stock-based compensation, inventory, intangible assets, goodwill and other long-lived assets, warranty liabilities, pension liabilities, acquisition expenses, income taxes and investments. Management bases its estimates and judgments on historical experience and on various other factors that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

XML

Recently Issued Accounting Pronouncements

3 Months Ended

Mar. 31, 2019

Accounting Changes and Error Corrections [Abstract]

Recently Issued Accounting Pronouncements

2) Recently Issued Accounting Pronouncements

In October 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2018-16, “Derivatives and Hedging (Topic 815).” This standard permits the use of the Overnight Index Swap Rate (“OIS”) based on the Secured Overnight Financing Rate as a U.S. benchmark interest rate for hedge accounting purposes under Topic 815 in addition to the interest rates on direct treasury obligations of the U.S. government, the London Interbank Offered Rate (“LIBOR”) swap rate, the OIS rate based on the Federal Funds Effective Rate and the Securities Industry and Financial Markets Association Municipal Swap Rate. This standard is effective for annual periods beginning after December 15, 2018, including interim periods within those fiscal years. The Company adopted this ASU during the first quarter of 2019 and the adoption of this ASU did not have a material impact on the Company’s consolidated financial statements.

In August 2018, the FASB issued ASU 2018-15, “Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract.” This standard aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments to this update. This standard is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years. The Company does not expect adoption of this ASU to have a material impact on the Company’s consolidated financial statements.

In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815).” This standard better aligns an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. The provisions of this ASU are effective for annual periods beginning after December 15, 2018, including interim periods within those fiscal years. The Company adopted this ASU during the first quarter of 2019 and the adoption of this ASU did not have a material impact on the Company’s consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases. This standard requires the recognition of lease assets and liabilities for all leases, with certain exceptions, on the balance sheet. This ASU is effective for annual periods beginning after December 15, 2018, including interim periods within those fiscal years. The Company adopted ASU 2016-02 on January 1, 2019, and used the effective date as its date of initial application. As such, the Company did not adjust prior period amounts. The Company also elected to adopt the package of practical expedients upon transition, which permits companies to not reassess lease identification, classification, and initial direct costs under ASU 2016-02 for leases that commenced prior to the effective date. The Company implemented internal controls and a lease accounting information system to enable preparation on adoption. Upon adoption, the Company recorded a cumulative effect of initially applying this new standard, resulting in the addition of $71,042 of right-of-use assets and $20,192 and $54,147 of short-term and long-term lease liabilities, respectively. The right-of-use asset is net of the deferred rent liability, prepaid rent and a net favorable lease asset which were re-classified to the right-of-use asset upon adoption of the standard. For additional information on the required disclosures related to the impact of adopting this standard, see Note 3 to the Consolidated Condensed Financial Statements.

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Leases

3 Months Ended

Mar. 31, 2019

Text Block [Abstract]

Leases

3) Leases

The Company has operating leases for real estate and non-real estate, which are comprised of automobiles, in North America, Europe, and Asia. The Company does not have any finance leases.

The Company has lease arrangements with lease and non-lease components, has elected to account for the lease and non-lease components as a single lease component, and has allocated all of the contract consideration to the lease component only. The Company has existing net leases in which the non-lease components (e.g. common area maintenance, maintenance, consumables, etc.) are paid separately from rent based on actual costs incurred. Therefore, non-lease components are not included in the right-of-use asset and lease liability and are reflected as expenses in the periods incurred.

The Company has existing leases that include variable lease and non-lease components that are not included in the right-of-use asset and lease liability, and are reflected as expenses in the periods incurred. Such payments primarily include common area maintenance charges and increases in rent payments that are driven by factors such as future changes in an index (e.g., the Consumer Price Index).

A right-of-use asset of $65,628, short-term lease liability of $19,459 and long-term lease liability of $49,392 were reflected on the balance sheet as of March 31, 2019.

The elements of lease expense were as follows:

	Three Months Ended March 31, 2019
Lease Cost:
Operating lease cost	$	5,377
Other Information:
Operating cash flows used for operating leases	$	5,711
Weighted average discount rate		3.81	%
Weighted average remaining lease term		4.9 years

Future lease payments under non-cancelable leases as of March 31, 2019 are detailed as follows:

2019 (remaining)	$	16,831
2020		18,608
2021		12,687
2022		7,518
2023		6,315
Thereafter		13,761
Total lease payments		75,720
Less: imputed interest		6,869
Total operating lease liabilities	$	68,851

Minimum lease payments under operating leases prior to adoption of ASU 2016-02 were as follows:

Year Ending December 31,	Operating Leases
2019	$	20,106
2020		17,142
2021		10,325
2022		5,573
2023		4,411
Thereafter		8,739
Total minimum lease payments	$	66,296

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Revenue from Contracts with Customers

3 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

Revenue from Contracts with Customers

4) Revenue from Contracts with Customers

Contract assets as of March 31, 2019 and December 31, 2018 were $3,624 and $3,624, respectively, and included in other current assets.

A rollforward of the Company’s deferred revenue and customer advances is as follows:

	Three Months Ended March 31, 2019
Beginning balance, January 1(1)	$	17,474
Deferred revenue and customer advances assumed in ESI Merger		3,314
Additions to deferred revenue and customer advances		17,219
Amount of deferred revenue and customer advances recognized in income		(13,933	)
Ending balance, March 31(2)	$	24,074

⁽¹⁾ Beginning deferred revenue and customer advances as of January 1, 2019 included $8,134 of current deferred revenue, $3,228 of long-term deferred revenue and $6,112 of current customer advances.

⁽²⁾ Ending deferred revenue as of March 31, 2019 included $13,322 of current deferred revenue, $3,018 of long-term deferred revenue and $7,734 of current customer advances.

Disaggregation of Revenue

The following table summarizes revenue from contracts with customers:

	Three Months Ended March 31, 2019
	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Total
Net revenues:
Products	$	192,648	$	178,697	$	26,018	$	397,363
Services		41,707		15,291		9,200		66,198
Total net revenues	$	234,355	$	193,988	$	35,218	$	463,561
	Three Months Ended March 31, 2018
	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Total
Net revenues:
Products	$	304,336	$	192,341	$	—	$	496,677
Services		44,008		13,590		—		57,598
Total net revenues	$	348,344	$	205,931	$	—	$	554,275

Product revenue, excluding revenue from certain custom products, is recorded at a point in time, while the majority of the service revenue and revenue from certain custom products is recorded over time.

Refer to Note 17 for revenue by reportable segment, geography and groupings of similar products.

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Investments

3 Months Ended

Mar. 31, 2019

Investments, Debt and Equity Securities [Abstract]

Investments

5) Investments

The fair value of investments classified as short-term consists of the following:

	March 31, 2019		December 31, 2018
Available-for-sale investments:
Time deposits and certificates of deposit	$	101	$	102
Bankers’ acceptance drafts		1,722		989
Asset-backed securities		—		9,113
Commercial paper		33,509		19,359
Corporate obligations		8,994		9,352
U.S. treasury obligations		—		13,298
U.S. agency obligations		—		21,613
	$	44,326	$	73,826

Investments classified as long-term consist of the following:

	March 31, 2019		December 31, 2018
Available-for-sale investments:
Group insurance contracts	$	5,950	$	5,890
Cost method investments:
Minority interest in a private company		4,400		4,400
	$	10,350	$	10,290

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

As of March 31, 2019:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Short-term investments:
Available-for-sale investments:
Time deposits and certificates of deposit	$	99	$	2	$	—		$	101
Bankers’ acceptance drafts		1,722		—		—			1,722
Commercial paper		33,752		1		(244	)		33,509
Corporate obligations		8,996		1		(3	)		8,994
	$	44,569	$	4	$	(247	)	$	44,326
As of March 31, 2019:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Long-term investments:
Available-for-sale investments:
Group insurance contracts	$	5,582	$	368	$	—		$	5,950
As of December 31, 2018:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Short-term investments:
Available-for-sale investments:
Time deposits and certificates of deposit	$	102	$	—	$	—		$	102
Bankers’ acceptance drafts		989		—		—			989
Asset-backed securities		9,121		1		(9	)		9,113
Commercial paper		19,504		—		(145	)		19,359
Corporate obligations		9,367		—		(15	)		9,352
U.S. treasury obligations		13,294		4		—			13,298
U.S. agency obligations		21,617		2		(6	)		21,613
	$	73,994	$	7	$	(175	)	$	73,826

As of December 31, 2018:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Estimated Fair Value
Long-term investments:
Available-for-sale investments:
Group insurance contracts	$	5,546	$	344	$	—	$	5,890

The tables above, which show the gross unrealized gains and (losses) aggregated by investment category for available-for-sale investments as of March 31, 2019 and December 31, 2018, reflect the inclusion within short-term investments of investments with contractual maturities greater than one year from the date of purchase. Management has the ability, if necessary, to liquidate any of its investments in order to meet the Company’s liquidity needs in the next 12 months. Accordingly, those investments with contractual maturities greater than one year from the date of purchase are classified as short-term on the accompanying balance sheets.

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 March 31, 2019 and December 31, 2018 were temporary.

Interest income is accrued as earned. Dividend income is recognized as income on the date the stock trades “ex-dividend.” The cost of marketable securities sold is determined by the specific identification method. Realized gains or losses are reflected in income and were not material for the three months ended March 31, 2019 and 2018.

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Fair Value Measurements

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurements

6) Fair Value Measurements

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

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

Level 1

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

Level 2

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

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

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

Assets and liabilities of the Company are measured at fair value on a recurring basis as of March 31, 2019 and are summarized as follows:

			Fair Value Measurements at Reporting Date Using
Description	March 31, 2019		Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents:
Money market funds	$	294	$	294	$	—	$	—
Time deposits and certificates of deposit		3,852		—		3,852		—
Commercial paper		82,584		—		82,584		—
Corporate obligations		12,570		—		12,570		—
U.S. agency obligations		49,084		—		49,084		—
Restricted cash – money market funds		317		317		—		—
Available-for-sale investments:
Time deposits and certificates of deposit		101		—		101		—
Bankers’ acceptance drafts		1,722		—		1,722		—
Commercial paper		33,509		—		33,509		—
Corporate obligations		8,994		—		8,994		—
Group insurance contracts		5,950		—		5,950		—
Derivatives – currency forward contracts		3,492		—		3,492		—
Funds in investments and other assets:
Israeli pension assets		14,481		—		14,481		—
Derivatives – interest rate hedge – non-current		4,459		—		4,459		—
Deferred compensation plan assets:
Mutual funds and exchange traded funds		1,799		—		1,799		—
Money market securities		274		—		274		—
Total assets	$	223,482	$	611	$	222,871	$	—
Liabilities:
Derivatives – currency forward contracts	$	322	$	—	$	322	$	—
Reported as follows:
Assets:
Cash and cash equivalents, including restricted cash(1)	$	148,701	$	611	$	148,090	$	—
Short-term investments		44,326		—		44,326		—
Other current assets		3,492		—		3,492		—
Total current assets	$	196,519	$	611	$	195,908	$	—
Long-term investments(2)	$	5,950	$	—	$	5,950	$	—
Other assets		21,013		—		21,013		—
Total long-term assets	$	26,963	$	—	$	26,963	$	—
Liabilities:
Other current liabilities	$	322	$	—	$	322	$	—

⁽¹⁾ The cash and cash equivalent amounts presented in the table above do not include cash of $269,315 as of March 31, 2019.

⁽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, 2018 and are summarized as follows:

			Fair Value Measurements at Reporting Date Using
Description	December 31, 2018		Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents:
Money market funds	$	180,340	$	180,340	$	—	$	—
Time deposits and certificates of deposit		850		—		850		—
Commercial paper		2,687		—		2,687		—
U.S. agency obligations		3,418		—		3,418		—
Restricted cash – money market funds		110		110		—		—
Available-for-sale investments:
Time deposits and certificates of deposit		102		—		102		—
Bankers’ acceptance drafts		989		—		989		—
Asset-backed securities		9,113		—		9,113		—
Commercial paper		19,359		—		19,359		—
Corporate obligations		9,352		—		9,352		—
U.S. treasury obligations		13,298		—		13,298		—
U.S. agency obligations		21,613		—		21,613		—
Group insurance contracts		5,890		—		5,890		—
Derivatives – currency forward contracts		2,485		—		2,485		—
Funds in investments and other assets:
Israeli pension assets		14,408		—		14,408		—
Derivatives – interest rate hedge – non-current		6,083		—		6,083		—
Total assets	$	290,097	$	180,450	$	109,647	$	—
Liabilities:
Derivatives – currency forward contracts	$	1,168	$	—	$	1,168	$	—
Reported as follows:
Assets:
Cash and cash equivalents, including restricted cash(1)	$	187,405	$	180,450	$	6,955	$	—
Short-term investments		73,826		—		73,826		—
Other current assets		2,485		—		2,485		—
Total current assets	$	263,716	$	180,450	$	83,266	$	—
Long-term investments(2)	$	5,890	$	—	$	5,890	$	—
Other assets		20,491		—		20,491		—
Total long-term assets	$	26,381	$	—	$	26,381	$	—
Liabilities:
Other current liabilities	$	1,168	$	—	$	1,168	$	—

⁽¹⁾ The cash and cash equivalent amounts presented in the table above do not include cash of $456,940 as of December 31, 2018.

⁽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.

Available-For-Sale Investments

Available-for-sale investments consisted of time deposits, certificates of deposit, bankers’ acceptance drafts, asset-backed securities (which include auto loans, credit card receivables and equipment trust receivables), commercial paper, corporate obligations, U.S. treasury obligations, U.S. agency obligations and group insurance contracts.

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

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 rates and variable 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 and interest rate fluctuations through the use of derivative financial instruments. The principal market in which the Company executes its foreign currency contracts and interest rate swaps is the institutional market in an over-the-counter environment with a relatively high level of price transparency. The market participants usually are large commercial banks. The forward foreign currency exchange contracts and interest rate hedge are valued using broker quotations or market transactions and are classified within Level 2 of the fair value hierarchy.

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Derivatives

3 Months Ended

Mar. 31, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives

7) Derivatives

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

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 11. This hedge fixes the interest rate paid on the hedged debt at 1.198% per annum plus the applicable credit spread, which was 2.0% as of March 31, 2019, 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. At March 31, 2019, the notional amount of this transaction was $290,000 and had a fair value of $4,459. At December 31, 2018, the notional amount of this transaction was $290,000 and had a fair value of $6,083.

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 the variability of the hedged cash flows, and otherwise meet the hedge accounting criteria, changes in the derivatives’ fair value are not included in current earnings but are included in OCI in stockholders’ equity. These changes in fair value will subsequently be reclassified into earnings, as applicable, when the forecasted transaction occurs. To the extent that a previously designated hedging transaction is no longer an effective hedge, any ineffectiveness measured in the hedging relationship is recorded currently in earnings in the period it occurs. The cash flows resulting from forward exchange contracts are classified in the consolidated statements of cash flows as part of cash flows from operating activities. The Company does not enter into derivative instruments for trading or speculative purposes.

As of March 31, 2019 and December 31, 2018, the Company had outstanding forward foreign exchange contracts with gross notional values of $144,002 and $159,394, respectively. The following tables provide a summary of the primary net hedging positions and corresponding fair values held as of March 31, 2019 and December 31, 2018:

	March 31, 2019
Currency Hedged (Buy/Sell)	Gross Notional Value		Fair Value(1)
U.S. Dollar/Japanese Yen	$	39,022	$	302
U.S. Dollar/South Korean Won		54,077		1,424
U.S. Dollar/Euro		20,146		916
U.S. Dollar/U.K. Pound Sterling		10,921		125
U.S. Dollar/Taiwan Dollar		19,836		403
Total	$	144,002	$	3,170

	December 31, 2018
Currency Hedged (Buy/Sell)	Gross Notional Value		Fair Value(1)
U.S. Dollar/Japanese Yen	$	43,770	$	(478	)
U.S. Dollar/South Korean Won		59,149		570
U.S. Dollar/Euro		23,515		688
U.S. Dollar/U.K. Pound Sterling		11,827		323
U.S. Dollar/Taiwan Dollar		21,133		214
Total	$	159,394	$	1,317

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

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

Derivatives Designated as Hedging Instruments	March 31, 2019			December 31, 2018
Derivative assets:
Foreign exchange contracts(1)	$	3,492		$	2,485
Foreign currency interest rate hedge(2)		4,459			6,083
Derivative liabilities:
Foreign exchange contracts(1)		(322	)		(1,168	)
Total net derivative asset designated as hedging instruments	$	7,629		$	7,400

⁽¹⁾ The derivative assets of $3,492 and $2,485 as of March 31, 2019 and December 31, 2018, respectively, related to foreign exchange contracts and are classified in other current assets in the consolidated balance sheet. The derivative liabilities of $322 and $1,168 as of March 31, 2019 and December 31, 2018, respectively, 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 foreign currency interest rate hedge assets of $4,459 and $6,083 as of March 31, 2019 and December 31, 2018, respectively, are classified in other assets in the consolidated balance sheet.

The net amount of existing gains as of March 31, 2019 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 gains (losses) on derivatives designated as cash flow hedging instruments:

	Three Months Ended March 31,
Derivatives Designated as Cash Flow Hedging Instruments	2019		2018
Forward exchange contracts:
Net gain recognized in OCI(1)	$	67	$	66
Net gain (loss) reclassified from accumulated OCI into income(2)	$	949	$	(2,539	)

⁽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 March 31, 2019 and 2018. The tax effect of the gains or losses reclassified from accumulated OCI into income is immaterial.

The following table provides a summary of the gain (loss) on derivatives not designated as hedging instruments:

	Three Months Ended March 31,
Derivatives Not Designated as Hedging Instruments	2019		2018
Forward exchange contracts:
Net gain (loss) recognized in income(1)	$	57	$	(1,253	)

⁽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 other (expense) income.

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Inventories

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Inventories

8) Inventories

Inventories consist of the following:

	March 31, 2019		December 31, 2018
Raw materials	$	303,588	$	235,593
Work-in-process		76,560		61,908
Finished goods		95,485		87,188
	$	475,633	$	384,689

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Acquisitions

3 Months Ended

Mar. 31, 2019

Business Combinations [Abstract]

Acquisitions

9) Acquisitions

Electro Scientific Industries, Inc.

On February 1, 2019, the Company completed its acquisition of Electro Scientific Industries, Inc. (“ESI”) pursuant to an Agreement and Plan of Merger, dated as of October 29, 2018 (the “Merger Agreement”), by and among the Company, EAS Equipment, Inc., formerly a Delaware corporation and a wholly-owned subsidiary of the Company, and ESI (the “ESI Merger”). At the effective time of the ESI Merger and pursuant to the terms and conditions of the Merger Agreement, each share of ESI’s common stock that was issued and outstanding immediately prior to the effective time of the ESI Merger was converted into the right to receive $30.00 in cash, without interest and subject to deduction of any required withholding tax.

The aggregate consideration of approximately $1,032,671, excluding related transaction fees and expenses, and non-cash consideration related to the exchange of share-based awards of approximately $30,630 for a total purchase consideration of approximately $1,063,301. 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 described in Note 11.

ESI provides laser-based manufacturing solutions for the micro-machining industry that enable customers to optimize production. It’s market is composed primarily of flexible and rigid PCB processing/fabrication, semiconductor wafer processing and passive component manufacturing and testing. ESI solutions incorporate specialized laser technology and proprietary control software to efficiently process the materials and components that are an integral part of electronic devices and systems.

The purchase price of ESI consisted of the following:

Cash paid for outstanding shares(1)	$	1,032,671
Settlement of share-based compensation awards(2)		30,630
Total purchase price		1,063,301
Less: Cash and cash equivalents acquired		(44,072	)
Total purchase price, net of cash and cash equivalents acquired	$	1,019,229

⁽¹⁾  Represents cash paid of $30.00 per share for approximately 34,422,361 shares of ESI common stock, without interest and subject to a deduction for any required withholding tax.

⁽²⁾  Represents the vested but not issued portion of ESI share-based compensation awards as of the acquisition date of February 1, 2019.

Under the acquisition method of accounting, the total estimated acquisition consideration is allocated to the acquired tangible and intangible assets and assumed liabilities of ESI 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 expects that none of such goodwill and intangible assets will be deductible for tax purposes.

The following table summarizes the allocation of the preliminary purchase price to the fair values assigned to assets acquired and liabilities assumed at the date of the ESI Merger:

Current assets (excluding inventory)	$	209,194
Inventory		92,364
Intangible assets		318,600
Goodwill		471,403
Property, plant and equipment		52,891
Long-term assets		9,633
Total assets acquired		1,154,085
Current liabilities		51,479
Non-current deferred taxes		32,146
Other long-term liabilities		7,159
Total liabilities assumed		90,784
Fair value of assets acquired and liabilities assumed		1,063,301
Less: Cash and cash equivalents acquired		(44,072	)
Total purchase price, net of cash and cash equivalents acquired	$	1,019,229

The fair value write-up of acquired finished goods inventory and demonstration inventory was $8,383, the amount of which will be expensed over the period during which the acquired inventory is sold. Accordingly, for the three months ended March 31, 2019, the Company recorded a $5,140 incremental cost of sales charge associated with the fair value write-up of inventory acquired in the ESI Merger.

The fair value write-up of acquired property, plant and equipment of $26,667 will be amortized over the estimated useful life of the applicable assets. Property, plant and equipment is valued at its value-in-use, unless there was a known plan to dispose of the asset.

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 related estimate of useful lives:

Completed technology - Laser	$	257,900	12 years
Completed technology - Non-Laser		18,500	10 years
Trademarks and trade names		14,400	7 years
Customer relationships		25,400	10 years
Backlog		2,400	1 year
	$	318,600

The net 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.

While the Company uses its best estimates and assumptions as part of the purchase price allocation process to value the assets acquired and liabilities assumed on the acquisition date, its estimates and assumptions are subject to refinement. Fair value estimates are based on a complex series of judgments about future events and uncertainties and rely heavily on estimates and assumptions. The judgments used to determine the estimated fair value assigned to each class of assets acquired and liabilities assumed, as well as asset lives, can materially impact the Company’s results of operations. The finalization of the purchase accounting assessment will result in a change in the valuation of assets acquired and liabilities assumed and may have a material impact on the Company’s results of operations and financial position. As a result, during the measurement period, which may be up to one year from the acquisition date, the Company records adjustments to the assets acquired and liabilities assumed with a corresponding offset to goodwill to reflect additional information received about facts and circumstances which existed at the date of acquisition. The Company records adjustments to the assets acquired and liabilities assumed subsequent to the purchase price allocation period in the Company’s operating results in the period in which the adjustments are determined. The size and breadth of the ESI Merger will necessitate the use of this measurement period to adequately analyze and assess a number of the factors used in establishing the fair value of certain tangible and intangible assets acquired and liabilities assumed as of the acquisition date and the related tax impacts of any changes made. Any potential adjustments made could be material in relation to the preliminary values presented above.

The Company believes the amount of goodwill relative to identifiable intangible assets relates to several factors including: (1) broadening its position in key industrial end markets to complementary solutions; and (2) leveraging component and systems expertise to provide robust solutions to meet customer evolving technology needs.

The results of this acquisition were included in the Company’s consolidated statement of operations beginning on February 1, 2019. ESI constitutes the Company’s Equipment & Solutions reportable segment (see Note 17).

Certain executives from ESI had severance provisions in their respective ESI 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. The Company recorded costs of $2,701 and $14,023 in acquisition and integration costs as compensation expense and stock-based compensation expense, respectively, for the three months ended March 31, 2019 associated with these severance provisions. The restricted stock units and stock appreciation rights that were eligible for accelerated vesting if the executive exercised his or her rights but were not issued as of each reporting period-end, will be excluded from the computation of basic earnings per share and included in the computation of diluted earnings per share for such reporting period.

In addition, the Company recorded $6,764 in acquisition and integration costs, which were primarily advisory services costs.

The Company’s consolidated net revenue and earnings for the three months ended March 31, 2019 include the following amounts of revenue and earnings of ESI since the acquisition date:

	Three Months Ended March 31, 2019
Total net revenues	$	35,218
Net loss	$	(31,716	)
Net loss per share:
Basic	$	(0.59	)
Diluted	$	(0.59	)

Pro Forma Results

The following unaudited pro forma financial information presents the combined results of operations of the Company as if the ESI Merger had occurred on January 1, 2018. The unaudited pro forma financial information is not necessarily indicative of what the Company’s condensed consolidated results of operations actually would have been had the acquisition occurred at the beginning of each year. In addition, the unaudited pro forma financial information does not attempt to project the future results of operations of the combined Company.

	Three Months Ended March 31,
	2019		2018
Total net revenues	$	478,069	$	660,513
Net income	$	49,135	$	101,633
Net income per share:
Basic	$	0.91	$	1.87
Diluted	$	0.90	$	1.84

The unaudited pro forma financial information above gives effect primarily to the following:

(1) Incremental amortization and depreciation expense related to the estimated fair value of identifiable intangible assets and property, plant and equipment, respectively from the purchase price allocation.

(2) Revenue and cost of goods sold, adjustments as a result of the reduction in deferred revenue and the cost related to their estimated fair value.

(3) Incremental interest expense related to the Company’s Incremental Term Loan Facility, as discussed in Note 11.

(4) The exclusion of acquisition costs and inventory and demonstration inventory step-up amortization from the three month periods ended March 31, 2019 and the addition of these items to the three month period ended March 31, 2018.

(5) The exclusion of debt issuance costs due to the modification of the Incremental Term Loan Facility from the three month period ended March 31, 2019 and the addition of this item to the three month period ended March 31, 2018.

(6) The estimated tax impact of the above adjustments.

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Goodwill and Intangible Assets

3 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

10) 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.

Effective July 1, 2018, the Company reassigned goodwill to certain reporting units within the Light & Motion reportable segment resulting from a reorganization of the composition of goodwill reporting units. The goodwill was reassigned to the reporting units affected using the relative fair value approach. In conjunction with this goodwill reassignment, the Company performed an interim quantitative impairment test as of July 1, 2018 for all of its reporting units and concluded that the fair values of each reporting unit exceeded their respective carrying values.    

Effective January 1, 2019, the Company reassigned goodwill to certain reporting units within the Light & Motion reportable segment resulting from a reorganization of the composition of goodwill reporting units. The goodwill was reassigned to the reporting units affected using the relative fair value approach. The Company also concluded that the fair value of each reporting unit exceeded its respective carrying value.

The changes in the carrying amount of goodwill and accumulated impairment loss during the three months ended March 31, 2019 and year ended December 31, 2018 were as follows:

	Three Months Ended March 31, 2019									Twelve Months Ended December 31, 2018
	Gross Carrying Amount			Accumulated Impairment Loss			Net			Gross Carrying Amount			Accumulated Impairment Loss			Net
Beginning balance at January 1	$	731,272		$	(144,276	)	$	586,996		$	735,323		$	(144,276	)	$	591,047
Acquired goodwill(1)		471,403			—			471,403			—			—			—
Foreign currency translation		(1,068	)		—			(1,068	)		(4,051	)		—			(4,051	)
Ending balance at March 31, 2019 and December 31, 2018	$	1,201,607		$	(144,276	)	$	1,057,331		$	731,272		$	(144,276	)	$	586,996

⁽¹⁾ During the three months ended March 31, 2019, the Company recorded $471,403 of goodwill related to the ESI Merger.

Intangible Assets

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

As of March 31, 2019:	Gross		Accumulated Impairment Charges			Accumulated Amortization			Foreign Currency Translation			Net
Completed technology(1)	$	448,831	$	(105	)	$	(146,614	)	$	(162	)	$	301,950
Customer relationships(1)		308,144		(1,406	)		(68,738	)		(819	)		237,181
Patents, trademarks, trade names and other(1)		120,895		—			(40,976	)		41			79,960
	$	877,870	$	(1,511	)	$	(256,328	)	$	(940	)	$	619,091

⁽¹⁾ During the three months ended March 31, 2019, the Company recorded $318,600 of separately identified intangible assets related to the ESI Merger, of which $276,400 was completed technology, $25,400 was customer relationships and $16,800 was trademarks, trade names and backlog. Separately, on January 1, 2019, the Company reclassified $6,428 of gross favorable lease assets and $3,445 of related accumulated amortization from patents, trademarks, trade names and other to the right-of-use asset line in the balance sheet.

As of December 31, 2018:	Gross		Impairment Charges			Accumulated Amortization			Foreign Currency Translation			Net
Completed technology	$	172,431	$	(105	)	$	(137,283	)	$	(73	)	$	34,970
Customer relationships		282,744		(1,406	)		(63,788	)		(269	)		217,281
Patents, trademarks, trade names and other		110,523		—			(42,954	)		(13	)		67,556
	$	565,698	$	(1,511	)	$	(244,025	)	$	(355	)	$	319,807

Aggregate amortization expense related to acquired intangibles for the three months ended March 31, 2019 and 2018 was $15,727 and $11,190, respectively. The net amortization expense from favorable lease commitments for the three months ended March 31, 2019 and 2018 was net of $0 and $407, respectively. Aggregate net amortization expense related to acquired intangible assets for future years is as follows:

Year	Amount
2019 (remaining)	$	51,638
2020		55,751
2021		47,958
2022		45,480
2023		45,121
2024		44,204
Thereafter		273,039

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Debt

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Debt

11) Debt

Term Loan Credit Agreement

In connection with the completion of the acquisition of Newport Corporation in 2016 (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 in the original principal amount of $780,000 (the “2016 Term Loan Facility”), subject to increase at the Company’s option and subject to receipt of lender commitments in accordance with the Credit Agreement (the 2016 Term Loan Facility, together with the 2019 Incremental Term Loan Facility (as defined below), “Term Loan Facility”). The 2016 Term Loan Facility matures on April 29, 2023. 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; 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. The Company has elected the interest rate as described in clause (b). The Credit Agreement provides that, unless an alternate rate of interest is agreed, all loans will be determined by reference to the Base Rate if the LIBOR rate cannot be ascertained, if regulators impose material restrictions on the authority of a lender to make LIBOR rate loans, or for other reasons. The 2016 Term Loan Facility was issued with original issue discount of 1.00% of the principal amount thereof.

The Company subsequently entered into four separate repricing amendments to the 2016 Term Loan Facility, which decreased the applicable margin for LIBOR borrowings from 4.0% to 1.75%, with a LIBOR rate floor of 0.75%. As a consequence of the pricing of the 2019 Incremental Term Loan Facility (defined below), the applicable margin for the 2016 Term Loan Facility was increased to 2.00% (from 1.75%) with respect to LIBOR borrowings and 1.00% (from 0.75%) with respect to base rate borrowings. The interest rate on the 2016 Term Loan Facility as of March 31, 2019 was 4.5%.

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 2016 Term Loan Facility. The rate is fixed at 1.198% per annum plus the applicable credit spread, which was 2.0% at March 31, 2019. At March 31, 2019, the notional amount of this transaction was $290,000 and had a fair value of $4,459.

As of March 31, 2019, after total principal prepayments of $425,000 and regularly scheduled principal payments of $6,536, the total outstanding principal balance of the 2016 Term Loan Facility was $348,464. As a result of making these prepayments, the Company is no longer required to make any regularly scheduled principal payments on the 2016 Term Loan Facility until the maturity date of the loan.

The Company incurred $28,747 of deferred finance fees, original issue discount and repricing fees related to the term loans under the 2016 Term Loan Facility, which are included in long-term debt in the accompanying consolidated balance sheets and are being amortized to interest expense over the estimated life of the term loans using the effective interest method. A portion of these fees have been accelerated in connection with the various debt prepayments during 2016, 2017 and 2018. As of March 31, 2019, the remaining balance of the deferred finance fees, original issue discount and repricing fees related to the 2016 Term Loan Facility was $3,980.

On February 1, 2019, in connection with the completion of the ESI Merger, the Company entered into an amendment (“Amendment No. 5”) to the Credit Agreement. Amendment No. 5 provided an additional tranche B-5term loan commitment in the principal amount of $650,000 (the “2019 Incremental Term Loan Facility”), all of which was drawn down in connection with the closing of the ESI Merger. Pursuant to Amendment No. 5, the Company also effectuated certain amendments to the Credit Agreement which make certain of the negative covenants and other provisions less restrictive. The 2019 Incremental Term Loan Facility matures on February 1, 2026 and bears interest at a rate per annum equal to, at the Company’s option, a base rate or LIBOR rate (as described above) plus, in each case, an applicable margin equal to 1.25% with respect to base rate borrowings and 2.25% with respect to LIBOR borrowings. The 2019 Incremental Term Loan Facility was issued with original issue discount of 1.00% of the principal amount thereof.

The Company incurred $11,362 of deferred finance fees and original issue discount fees related to the term loans under the 2019 Incremental Term Loan Facility, which are included in long-term debt in the accompanying consolidated balance sheets and are being amortized to interest expense over the estimated life of the term loans using the effective interest method. As of March 31, 2019, the remaining balance of the deferred finance fees and original issue discount related to the 2019 Incremental Term Loan Facility was $11,244.

The Company is required to make scheduled quarterly payments each equal to 0.25% of the original principal amount of the 2019 Incremental Term Loan Facility, with the balance due on February 1, 2026. If on or prior to the date that is six months after the closing date of Amendment No. 5, the Company prepays any loans under the 2019 Incremental Term Loan Facility in connection with a repricing transaction, the Company must pay a prepayment premium of 1.00% of the aggregate principal amount of the loans so prepaid. At March 31, 2019, the total balance outstanding of the 2019 Incremental Term Loan Facility was $650,000 and the interest rate was 4.7%.

Under the Credit Agreement, the Company is required to prepay outstanding term loans under the 2016 Term Loan Facility and the 2019 Incremental Term Loan Facility, 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. As a result the Company’s Total Leverage Ratio, it was not required to make a prepayment of excess cash flow for the fiscal year ended December 31, 2018.

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 March 31, 2019, 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 in April 2016, the Company 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, that provided senior secured financing of up to $50,000, which the Company never borrowed against. On February 1, 2019, in connection with the completion of the ESI Merger, the Company terminated the $50,000 asset-based credit agreement with Deutsche Bank AG New York Branch and entered into an asset-based credit agreement with Barclays Bank PLC, 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 Credit Agreement”), that provides senior secured revolving credit financing of up to $100,000, subject to a borrowing base limitation (the “ABL Facility”). The borrowing base for the ABL Facility at any time equals the sum of: (a) 85% of certain eligible accounts; plus (b) prior to certain notice and filed examination and appraisal requirements, the lesser of (i) 20% of net book value of eligible inventory in the United States and (ii) 30% of the borrowing base, and after the satisfaction of such 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. The ABL Facility includes borrowing capacity in the form of letters of credit up to $25,000.

Borrowings under the ABL Facility bear interest at a rate per annum equal to, at the Company’s option, any of the following, plus, in each case, an applicable margin: (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 0.00%; 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, with a floor of 0.00%. The initial applicable margin for borrowings under the ABL Facility is 0.50% with respect to base rate borrowings and 1.50% with respect to LIBOR borrowings. 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.

In addition to paying interest on any outstanding principal under the ABL Facility, the Company is required to pay a commitment fee in respect of the unutilized commitments thereunder equal to 0.25% per annum. The Company must also pay customary letter of credit fees and agency fees.

The Company incurred $785 of costs in connection with the new ABL Facility, which were capitalized and included in other assets in the accompanying consolidated balance sheet and are being amortized to interest expense over the contractual term of five years of the ABL Facility. As a result of the prior asset-based facility being terminated, the Company wrote off $216 of previously capitalized debt issuance costs.

The ABL Credit Agreement also contains customary representations and warranties, affirmative covenants and provisions relating to events of default. If an event of default occurs, the lenders under the ABL Facility will be entitled to take various actions, including the acceleration of amounts due under the ABL Facility and all actions permitted to be taken by a secured creditor.

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 March 31, 2019 of up to an equivalent of $20,747. One of the borrowing arrangements has an interest rate based on the Tokyo Interbank Offer Rate at the time of borrowing and the other has an interest rate based on the Japanese Short-Term Prime Lending Rate. There were no borrowings outstanding under these arrangements at March 31, 2019 and December 31, 2018, respectively.

The Company has various revolving lines of credit and a financing facility. These revolving lines of credit and financing facility have no expiration date and as of March 31, 2019, provided for aggregate borrowings of up to an equivalent of $11,275. These lines of credit have a base interest rate of 1.25% plus a Japanese Yen overnight LIBOR rate. Total borrowings outstanding under these arrangements were $3,195 and $3,389 at March 31, 2019 and December 31, 2018, respectively.

One of the Company’s Austrian subsidiaries has various 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% to 0.75%.

	March 31, 2019		December 31, 2018
Short-term debt:
Japanese lines of credit	$	2,175	$	2,724
Japanese receivables financing facility		1,020		665
Austrian loans due through March 2020		586		597
Term Loan Facility		6,500		—
	$	10,281	$	3,986

	March 31, 2019		December 31, 2018
Long-term debt:
Austrian loans due through March 2020 and other debt	$	83	$	86
Term Loan Facility, net(1)		976,740		343,756
	$	976,823	$	343,842

⁽¹⁾  Net of deferred financing fees, original issuance discount and repricing fee of $15,224 and $4,708 as of March 31, 2019 and December 31, 2018, respectively.

The Company recognized interest expense of $9,119 and $5,430 for the three months ended March 31, 2019 and 2018, respectively.

Contractual maturities of the Company’s debt obligations as of March 31, 2019 are as follows:

Year	Amount
2019 (remaining	$	8,656
2020		6,583
2021		6,500
2022		6,500
2023		354,964
2024		6,500
Thereafter		612,625

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Product Warranties

3 Months Ended

Mar. 31, 2019

Guarantees and Product Warranties [Abstract]

Product Warranties

12) 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:

	Three Months Ended March 31,
	2019			2018
Beginning of period	$	10,399		$	10,104
Assumed product warranty liability from ESI Merger		7,177			—
Provision for product warranties		6,062			5,184
Direct and other charges to warranty liability		(6,705	)		(4,073	)
End of period(1)	$	16,933		$	11,215

⁽¹⁾  As of March 31, 2019, short-term product warranty of $13,843 and long-term product warranty of $3,090 were included within other current liabilities and other liabilities, respectively, within the accompanying condensed consolidated balance sheet. As of March 31, 2018, short-term product warranty of $10,856 and long-term product warranty of $359 were included within other current liabilities and other liabilities, respectively, within the accompanying condensed consolidated balance sheet.

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Income Taxes

3 Months Ended

Mar. 31, 2019

Income Tax Disclosure [Abstract]

Income Taxes

13) Income Taxes

The Company’s effective tax rates for the three months ended March 31, 2019 and 2018 were 18.8% and 17.1%, respectively. The effective tax rate for the three months ended March 31, 2019 and the related income tax expense were lower than the U.S. statutory tax rate due to the U.S. deduction for foreign derived intangible income, the federal tax credit for research activities and the geographic mix of income earned by the Company’s international subsidiaries being taxed at rates lower than the U.S. statutory tax rate, offset by the global intangible low-taxed income inclusion, the limitation on the deduction of executive compensation and state income taxes.

The Company’s effective tax rate for the three months ended March 31, 2018 and the related income tax expense were 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, windfall benefits of stock compensation and the deduction for foreign derived intangible income offset by the tax effects from global intangible low-taxed income and state income taxes.

As of March 31, 2019, the total amount of gross unrecognized tax benefits, which excludes interest and penalties, was approximately $40,725. At December 31, 2018, the total amount of gross unrecognized tax benefits, which excludes interest and penalties, was approximately $32,684. The net increase was primarily attributable to the addition of historical gross unrecognized tax benefits for ESI as a result of the ESI Merger during the quarter ended March 31, 2019. As of March 31, 2019, excluding interest and penalties, there were approximately $33,085 of net unrecognized tax benefits 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 March 31, 2019 and December 31, 2018, the Company had accrued interest on unrecognized tax benefits of approximately $543 and $568, respectively.    

Over the next 12 months it is reasonably possible that the Company may recognize approximately $1,452 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 U.S. Internal Revenue Service commenced an examination of the Company’s U.S. federal income tax filings for tax years 2015 and 2016 during the quarter ended September 30, 2017. This audit was effectively settled during the quarter ended March 31, 2018, and the impact was not material. Also during the quarter ended March 31, 2018, the Company received notification from the U.S. Internal Revenue Service of their intent to audit its U.S. subsidiary, Newport Corporation, for tax year 2015. This audit commenced during the quarter ended June 30, 2018 and there have been no proposed adjustments through March 31, 2019. The U.S. statute of limitations remains open for tax years 2015 through present. The statute of limitations for the Company’s tax filings in other jurisdictions varies between fiscal years 2013 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.

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Net Income Per Share

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Net Income Per Share

14) Net Income Per Share

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

	Three Months Ended March 31,
	2019		2018
Numerator:
Net income	$	12,455	$	105,121
Denominator:
Shares used in net income per common share – basic		54,147,000		54,423,000
Effect of dilutive securities:
Restricted stock units, stock appreciation rights and shares issued under employee stock purchase plan		701,000		863,000
Shares used in net income per common share – diluted		54,848,000		55,286,000
Net income per common share:
Basic	$	0.23	$	1.93
Diluted	$	0.23	$	1.90

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 months ended March 31, 2019 and 2018 there were approximately 128,200 and 380 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.

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Stock-Based Compensation

3 Months Ended

Mar. 31, 2019

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation

15) Stock-Based Compensation

The Company grants restricted stock units (“RSUs”) to employees and directors under the 2014 Stock Incentive Plan (the “2014 Plan”). The 2014 Plan is administered by the Compensation Committee of the Company’s Board of Directors. The 2014 Plan is intended to attract and retain employees and directors, and to provide an incentive for these individuals to assist the Company to achieve long-range performance goals and to enable these individuals to participate in the long-term growth of the Company.

In connection with the completion of the ESI Merger, the Company assumed:

• all RSUs that vest based solely on the satisfaction of service conditions, granted under any ESI equity plan, arrangement or agreement (“ESI Plan”) that were outstanding immediately prior to the effective time of the ESI Merger, and as to which shares of ESI common stock were not fully distributed in connection with the closing of the ESI Merger,

• all RSUs that were granted subject to vesting based on both the achievement of performance goals and the satisfaction of service conditions granted under any ESI Plan that were outstanding immediately prior to the effective time of the ESI Merger, and

• all stock appreciation rights (“SARs”) granted under any ESI Plan, whether vested or unvested, that were outstanding immediately prior to the effective time of the ESI Merger and held by an individual who was a service provider of ESI as of the date on which the effective time of the ESI Merger occurred.

As of the effective time of the ESI Merger, based on a formula in the Merger Agreement, (a) such RSUs were converted automatically into RSUs with respect to 736,133 shares of the Company’s common stock (the “Assumed RSUs”), and (b) all SARs were converted automatically into SARs with respect to 12,787 shares of the Company’s common stock (the “Assumed SARs”).

Included in the total number of assumed RSUs are 326,283 shares of the Company’s common stock for employees and outside directors that are part of the ESI Deferred Compensation plan. These shares 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 Plan.

The 748,920 shares of the Company’s common stock that are issuable pursuant to the Assumed RSUs and the Assumed SARs under the Company’s 2014 Plan were registered under the Securities Act of 1933 on the Registration Statement on Form S-8. These shares are in addition to the 18,000,000 shares of the Company’s common stock reserved for issuance under the Company’s 2014 Plan and previously registered under the Securities Act of 1933 on the Registration Statement on Form S-8.

During the three months ended March 31, 2019, the Company granted 182,212 RSUs with a weighted average grant date fair value of $82.58. During the three months ended March 31, 2018, the Company granted 122,831 RSUs with a weighted average grant date fair value of $109.62. There were no SARs granted during the three months ended March 31, 2019 or 2018.

The total stock-based compensation expense included in the Company’s consolidated statements of income and comprehensive income was as follows:

	Three Months Ended March 31,
	2019		2018
Cost of revenues	$	422	$	1,005
Research and development expense		810		722
Selling, general and administrative expense		8,038		8,699
Acquisition and integration related expense		18,568		—
Total pre-tax stock-based compensation expense	$	27,838	$	10,426

At March 31, 2019, the total compensation expense related to unvested stock-based awards granted to employees and directors under the 2014 Plan that had not been recognized was $31,356, net of estimated forfeitures. The future compensation expense for time-based awards is recognized on a straight-line basis and the future compensation expense for performance-based awards is recognized using the accelerated graded vesting method, both of which expense over the requisite service period, net of estimated forfeitures, except for retirement eligible employees, in which case 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:

	Three Months Ended March 31, 2019
	Outstanding RSUs			Weighted Average Grant Date Fair Value
RSUs – beginning of period		647,394		$	74.04
Assumed shares from ESI Merger		736,133		$	84.10
Accrued dividend shares		1,558		$	78.45
Granted		182,212		$	82.58
Vested		(274,898	)	$	67.57
Forfeited		(76,096	)	$	91.14
RSUs – end of period		1,216,303		$	81.81

The following table presents the activity for SARs under the Plan:

	Three Months Ended March 31, 2019
	Outstanding SARs			Weighted Average Grant Date Fair Value
SARs – beginning of period		177,538		$	28.52
Assumed SARs from ESI Merger		12,787		$	17.38
Exercised		(23,569	)	$	27.34
Forfeited or expired		(184	)	$	27.89
SARs Outstanding – end of period		166,572		$	27.86

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Stockholders' Equity

3 Months Ended

Mar. 31, 2019

Federal Home Loan Banks [Abstract]

Stockholders' Equity

16) 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 2,588,000 shares of common stock for approximately $127,000 pursuant to the program since its adoption. During the three months ended March 31, 2019 and 2018, there were no repurchases of common stock.

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. In addition, the Company accrues dividend equivalents on the RSUs the Company assumed in the ESI Merger described in Note 15 above when dividends are declared by the Company’s Board of Directors. During the three months ended March 31, 2019, the Company’s Board of Directors declared a quarterly cash dividend of $0.20 per share, which totaled $10,843. During the three months ended March 31, 2018, the Company’s Board of Directors declared a quarterly cash dividend of $0.18 per share, which totaled $9,808.

On May 8, 2019, the Company’s Board of Directors declared a quarterly cash dividend of $0.20 per share to be paid on June 7, 2019 to shareholders of record as of May 27, 2019. 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 Term Loan Facility and its ABL Facility, the Company may be restricted from paying dividends under certain circumstances.

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Business Segment, Geographic Area, Product and Significant Customer Information

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Business Segment, Geographic Area, Product and Significant Customer Information

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

The Company is a global provider of instruments, subsystems and process control solutions that measure, monitor, deliver, analyze, power and control critical parameters of advanced manufacturing processes to improve process performance and productivity for its customers. 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, power, reactive gas generation, vacuum technology, lasers, photonics, sub-micron positioning, vibration control, optics and laser-based manufacturing solutions. The Company also provides services relating to the maintenance and repair of its products, installation services and training. The Company’s primary served markets include semiconductor, industrial technologies, life and health sciences, research and defense.

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. Effective February 1, 2019, in conjunction with its acquisition of ESI, the Company created a third reportable segment known as the Equipment & Solutions segment in addition to its existing two reportable segments: the Vacuum & Analysis segment and the Light & Motion segment.

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 positioning, vibration control, and optics.

The Equipment & Solutions segment provides laser-based manufacturing solutions for the micro-machining industry that enable customers to optimize production. The segment’s market is composed primarily of flexible and rigid PCB processing/fabrication, semiconductor wafer processing and passive component manufacturing & test. Equipment & Solutions incorporate specialized laser technology and proprietary control software to efficiently process the materials and components that are an integral part of electronic devices and systems.

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 March 31,
	2019		2018
Vacuum & Analysis	$	234,355	$	348,344
Light & Motion		193,988		205,931
Equipment & Solutions		35,218		—
	$	463,561	$	554,275

The following table sets forth a reconciliation of segment gross profit to consolidated net income:

	Three Months Ended March 31,
	2019		2018
Gross profit by reportable segment:
Vacuum & Analysis	$	98,139	$	158,500
Light & Motion		92,741		104,355
Equipment & Solutions		7,238		—
Total gross profit by reportable segment		198,118		262,855
Operating expenses:
Research and development		38,933		34,857
Selling, general and administrative		82,455		82,949
Fees and expenses related to incremental term loan		5,847		—
Acquisition and integration costs		30,167		—
Restructuring		223		1,220
Customer contract obligation		1,700		—
Environmental costs		—		1,000
Amortization of intangible assets		15,727		11,190
Income from operations		23,066		131,639
Interest and other expense, net		7,730		4,897
Income before income taxes		15,336		126,742
Provision for income taxes		2,881		21,621
Net income	$	12,455	$	105,121

The following table sets forth capital expenditures by reportable segment for the three months ended March 31, 2019 and 2018:

	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Total
Three Months Ended March 31, 2019:
Capital expenditures	$	7,488	$	5,154	$	1,887	$	14,529
Three Months Ended March 31, 2018:
Capital expenditures	$	6,197	$	3,193	$	—	$	9,390

The following table sets forth depreciation and amortization by reportable segment for the three months ended March 31, 2019 and 2018:

	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Total
Three Months Ended March 31, 2019:
Depreciation and amortization	$	4,045	$	14,140	$	7,026	$	25,211
Three Months Ended March 31, 2018
Depreciation and amortization	$	5,129	$	15,363	$	—	$	20,492

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:

March 31, 2019:	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Corporate, Eliminations & Other			Total
Segment assets:
Accounts receivable	$	160,040	$	139,592	$	51,088	$	(14,730	)	$	335,990
Inventory, net		225,431		164,603		85,690		(91	)		475,633
Total segment assets	$	385,471	$	304,195	$	136,778	$	(14,821	)	$	811,623

December 31, 2018:	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Corporate, Eliminations & Other			Total
Segment assets:
Accounts receivable	$	171,604	$	140,658	$	—	$	(16,808	)	$	295,454
Inventory, net		222,965		161,658		—		66			384,689
Total segment assets	$	394,569	$	302,316	$	—	$	(16,742	)	$	680,143

The following is a reconciliation of segment assets to consolidated total assets:

	March 31, 2019		December 31, 2018
Total segment assets	$	811,623	$	680,143
Cash and cash equivalents and investments		472,692		728,461
Other current assets		86,387		65,790
Property, plant and equipment, net		251,424		194,367
Right-of-use asset		65,628		—
Goodwill and intangible assets, net		1,676,422		906,803
Other assets		48,562		38,682
Consolidated total assets	$	3,412,738	$	2,614,246

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 tax transfer prices and have been eliminated from consolidated net revenues.

	Three Months Ended March 31,
	2019		2018
Net revenues:
United States	$	224,347	$	276,720
Korea		35,802		54,011
Japan		42,102		58,274
Asia (excluding Korea and Japan)		101,327		101,384
Europe		59,983		63,886
	$	463,561	$	554,275

	March 31, 2019		December 31, 2018
Long-lived assets:(1)
United States	$	198,747	$	146,687
Europe		29,983		26,794
Asia		57,523		50,572
	$	286,253	$	224,053

⁽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 the Company’s reportable segments is as follows:

	March 31, 2019		December 31, 2018
Reportable segment:
Vacuum & Analysis	$	196,937	$	197,126
Light & Motion		388,896		389,870
Equipment & Solutions		471,498		—
Total goodwill	$	1,057,331	$	586,996

Worldwide Product Information

The Company groups its product offerings into three groups based upon the similarity of product function as follows:

	Three Months Ended March 31,
	2019		2018
Advanced Manufacturing Components	$	371,345	$	496,677
Global Service		66,198		57,598
Advanced Manufacturing Systems		26,018		—
	$	463,561	$	554,275

Advanced manufacturing components are comprised of product revenues from the Company’s Vacuum & Analysis and Light & Motion segments. Global service is comprised of total service revenues for all three of the Company’s reportable segments. Advanced manufacturing systems is comprised of product revenues for the Company’s Equipment & Solutions segment.

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Restructuring

3 Months Ended

Mar. 31, 2019

Restructuring and Related Activities [Abstract]

Restructuring

18) Restructuring

The Company recorded restructuring charges of $223 during the three months ended March 31, 2019, primarily related to severance costs related to the consolidation of certain functions in Asia. The Company recorded restructuring charges of $1,220 during the three months ended March 31, 2018 primarily related to severance costs related to streamlining and consolidating certain administrative functions.

Restructuring activities were as follows:

	Three Months Ended March 31,
	2019			2018
Beginning of period	$	2,632		$	3,244
Charged to expense		223			1,220
Payments and adjustments		(252	)		(1,806	)
End of period	$	2,603		$	2,658

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

19) Commitments and Contingencies

Newport Litigation

In March 2016, two putative class actions lawsuit captioned Dixon Chung v. Newport Corp., et al., Case No. A-16-733154-C, and Hubert C. Pincon v. Newport Corp., et al., Case No. A-16-734039-B, were filed in the District Court, Clark County, Nevada on behalf of a putative class of stockholders of Newport for claims related to the merger agreement (“Newport Merger Agreement”) between the Company, Newport, and a wholly-owned subsidiary of the Company (“Merger Sub”). The lawsuits named as defendants the Company, Newport, Merger Sub, and certain then current and former members of Newport’s board of directors. Both complaints alleged that Newport directors breached their fiduciary duties to Newport’s stockholders by agreeing to sell Newport through an inadequate and unfair process, which led to inadequate and unfair consideration, by agreeing to unfair deal protection devices and by omitting material information from the proxy statement. The complaints also alleged that the Company, Newport, and Merger Sub aided and abetted the directors’ alleged breaches of their fiduciary duties. The complaints sought injunctive relief, including to enjoin or rescind the Newport Merger Agreement, and an award of attorneys’ and other fees and costs, among other relief. On April 14, 2016, the Court consolidated the actions.

On October 19, 2016, plaintiffs in the consolidated action filed an amended complaint captioned In re Newport Corporation Shareholder Litigation, Case No. A-16-733154-B, in the District Court, Clark County, Nevada, on behalf of a putative class of Newport’s stockholders for claims related to the Newport Merger Agreement. The amended complaint contained substantially similar allegations related to Newport’s former board of directors’ alleged breaches of their fiduciary duties to Newport’s stockholders. The amended complaint sought monetary damages, including pre- and post-judgment interest. On June 22, 2017, the Court granted Defendants’ motion to dismiss and dismissed the amended complaint against all defendants but granted plaintiffs leave to amend.

On July 27, 2017, plaintiffs filed a second amended complaint containing substantially similar allegations but naming only Newport’s former directors as defendants. On August 8, 2017, the Court dismissed the Company and Newport from the action. The second amended complaint seeks monetary damages, including pre- and post-judgment interest. The Court granted a motion for class certification on September 27, 2018, appointing Mr. Pincon and Locals 302 and 612 of the International Union of Operating Engineers - Employers Construction Industry Retirement Trust as class representatives. On June 11, 2018, plaintiff Dixon Chung was voluntarily dismissed from the litigation. Discovery is ongoing in this action.

ESI Litigation

On November 29, 2018, a complaint captioned Brian Morris et. al. v. Electro Scientific Industries, Inc. et al. was filed in the U.S. District Court for the District of Oregon by alleged former stockholders of ESI in connection with the ESI Merger. The complaint named the Company’s subsidiary, ESI, and the former members of ESI’s board of directors as defendants. Five additional complaints were subsequently filed, two in the U.S. District Court for the District of Oregon and three in the Multnomah County Circuit Court in the State of Oregon. The cases filed in the U.S. District Court were dated December 6, 2018 and December 12, 2018 and captioned Melvyn Klein et. al. v. Electro Scientific Industries, Inc. et al. and Donald Mager et. al. v. Electro Scientific Industries, Inc. et al., respectively. The complaints filed in Multnomah County Circuit Court were dated December 5, 2018, December 5, 2018 and December 13, 2018 and captioned Michael Kent et. al v. Electro Scientific Industries, Inc. et al., Christopher Stanley et. al v. Electro Scientific Industries, Inc. et al. and Eduardo Colmenares et. al. v. Electro Scientific Industries, Inc., MKS Instruments, Inc., et al., respectively (collectively with Brian Morris et. al. v. Electro Scientific Industries, Inc. et. al., the “Lawsuits”).

The Lawsuits are purported class actions brought on behalf of former ESI stockholders, asserting various claims against the former members of the ESI board of directors, ESI, the Company and the Company’s merger subsidiary, including breach of fiduciary duty and aiding and abetting the breach of fiduciary duty. The Lawsuits allege that the consideration paid to the ESI shareholders did not appropriately value ESI, and that merger related disclosures failed to disclose certain material information regarding the merger. The Lawsuits purported to seek unspecified damages.

On February 26, 2019, the parties entered into a settlement agreement, pursuant to which plaintiffs dismissed their individual claims with prejudice and class claims without prejudice in return for ESI’s previous supplemental merger related disclosures in connection with the transaction. ESI provided supplemental merger related disclosures to eliminate the burden and expense of litigation and to avoid any possible disruption to the merger that could result from further litigation.

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 our results of operations, financial condition or cash flows.

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Recently Issued Accounting Pronouncements (Policies)

3 Months Ended

Mar. 31, 2019

Accounting Changes and Error Corrections [Abstract]

Recently Issued Accounting Pronouncements

In October 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2018-16, “Derivatives and Hedging (Topic 815).” This standard permits the use of the Overnight Index Swap Rate (“OIS”) based on the Secured Overnight Financing Rate as a U.S. benchmark interest rate for hedge accounting purposes under Topic 815 in addition to the interest rates on direct treasury obligations of the U.S. government, the London Interbank Offered Rate (“LIBOR”) swap rate, the OIS rate based on the Federal Funds Effective Rate and the Securities Industry and Financial Markets Association Municipal Swap Rate. This standard is effective for annual periods beginning after December 15, 2018, including interim periods within those fiscal years. The Company adopted this ASU during the first quarter of 2019 and the adoption of this ASU did not have a material impact on the Company’s consolidated financial statements.

In August 2018, the FASB issued ASU 2018-15, “Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract.” This standard aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments to this update. This standard is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years. The Company does not expect adoption of this ASU to have a material impact on the Company’s consolidated financial statements.

In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815).” This standard better aligns an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. The provisions of this ASU are effective for annual periods beginning after December 15, 2018, including interim periods within those fiscal years. The Company adopted this ASU during the first quarter of 2019 and the adoption of this ASU did not have a material impact on the Company’s consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases. This standard requires the recognition of lease assets and liabilities for all leases, with certain exceptions, on the balance sheet. This ASU is effective for annual periods beginning after December 15, 2018, including interim periods within those fiscal years. The Company adopted ASU 2016-02 on January 1, 2019, and used the effective date as its date of initial application. As such, the Company did not adjust prior period amounts. The Company also elected to adopt the package of practical expedients upon transition, which permits companies to not reassess lease identification, classification, and initial direct costs under ASU 2016-02 for leases that commenced prior to the effective date. The Company implemented internal controls and a lease accounting information system to enable preparation on adoption. Upon adoption, the Company recorded a cumulative effect of initially applying this new standard, resulting in the addition of $71,042 of right-of-use assets and $20,192 and $54,147 of short-term and long-term lease liabilities, respectively. The right-of-use asset is net of the deferred rent liability, prepaid rent and a net favorable lease asset which were re-classified to the right-of-use asset upon adoption of the standard. For additional information on the required disclosures related to the impact of adopting this standard, see Note 3 to the Consolidated Condensed Financial Statements.

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Leases (Tables)

3 Months Ended

Mar. 31, 2019

Text Block [Abstract]

Schedule Of Elements Of Lease Payments

The elements of lease expense were as follows:

	Three Months Ended March 31, 2019
Lease Cost:
Operating lease cost	$	5,377
Other Information:
Operating cash flows used for operating leases	$	5,711
Weighted average discount rate		3.81	%
Weighted average remaining lease term		4.9 years

Future Lease Payment Under Non-Cancelable Lease

Future lease payments under non-cancelable leases as of March 31, 2019 are detailed as follows:

2019 (remaining)	$	16,831
2020		18,608
2021		12,687
2022		7,518
2023		6,315
Thereafter		13,761
Total lease payments		75,720
Less: imputed interest		6,869
Total operating lease liabilities	$	68,851

Minimum Lease Payments under Operating Lease

Minimum lease payments under operating leases prior to adoption of ASU 2016-02 were as follows:

Year Ending December 31,	Operating Leases
2019	$	20,106
2020		17,142
2021		10,325
2022		5,573
2023		4,411
Thereafter		8,739
Total minimum lease payments	$	66,296

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Revenue from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

Schedule of Deferred Revenue and Customer Advances by Arrangement

A rollforward of the Company’s deferred revenue and customer advances is as follows:

	Three Months Ended March 31, 2019
Beginning balance, January 1(1)	$	17,474
Deferred revenue and customer advances assumed in ESI Merger		3,314
Additions to deferred revenue and customer advances		17,219
Amount of deferred revenue and customer advances recognized in income		(13,933	)
Ending balance, March 31(2)	$	24,074

⁽¹⁾ Beginning deferred revenue and customer advances as of January 1, 2019 included $8,134 of current deferred revenue, $3,228 of long-term deferred revenue and $6,112 of current customer advances.

⁽²⁾ Ending deferred revenue as of March 31, 2019 included $13,322 of current deferred revenue, $3,018 of long-term deferred revenue and $7,734 of current customer advances.

Summary of Revenue from Contracts with Customers

The following table summarizes revenue from contracts with customers:

	Three Months Ended March 31, 2019
	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Total
Net revenues:
Products	$	192,648	$	178,697	$	26,018	$	397,363
Services		41,707		15,291		9,200		66,198
Total net revenues	$	234,355	$	193,988	$	35,218	$	463,561
	Three Months Ended March 31, 2018
	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Total
Net revenues:
Products	$	304,336	$	192,341	$	—	$	496,677
Services		44,008		13,590		—		57,598
Total net revenues	$	348,344	$	205,931	$	—	$	554,275

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Investments (Tables)

3 Months Ended

Mar. 31, 2019

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:

	March 31, 2019		December 31, 2018
Available-for-sale investments:
Time deposits and certificates of deposit	$	101	$	102
Bankers’ acceptance drafts		1,722		989
Asset-backed securities		—		9,113
Commercial paper		33,509		19,359
Corporate obligations		8,994		9,352
U.S. treasury obligations		—		13,298
U.S. agency obligations		—		21,613
	$	44,326	$	73,826

Investments classified as long-term consist of the following:

	March 31, 2019		December 31, 2018
Available-for-sale investments:
Group insurance contracts	$	5,950	$	5,890
Cost method investments:
Minority interest in a private company		4,400		4,400
	$	10,350	$	10,290

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 investments:

As of March 31, 2019:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Short-term investments:
Available-for-sale investments:
Time deposits and certificates of deposit	$	99	$	2	$	—		$	101
Bankers’ acceptance drafts		1,722		—		—			1,722
Commercial paper		33,752		1		(244	)		33,509
Corporate obligations		8,996		1		(3	)		8,994
	$	44,569	$	4	$	(247	)	$	44,326
As of March 31, 2019:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Long-term investments:
Available-for-sale investments:
Group insurance contracts	$	5,582	$	368	$	—		$	5,950
As of December 31, 2018:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Short-term investments:
Available-for-sale investments:
Time deposits and certificates of deposit	$	102	$	—	$	—		$	102
Bankers’ acceptance drafts		989		—		—			989
Asset-backed securities		9,121		1		(9	)		9,113
Commercial paper		19,504		—		(145	)		19,359
Corporate obligations		9,367		—		(15	)		9,352
U.S. treasury obligations		13,294		4		—			13,298
U.S. agency obligations		21,617		2		(6	)		21,613
	$	73,994	$	7	$	(175	)	$	73,826

As of December 31, 2018:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Estimated Fair Value
Long-term investments:
Available-for-sale investments:
Group insurance contracts	$	5,546	$	344	$	—	$	5,890

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

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

Assets and liabilities of the Company are measured at fair value on a recurring basis as of March 31, 2019 and are summarized as follows:

			Fair Value Measurements at Reporting Date Using
Description	March 31, 2019		Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents:
Money market funds	$	294	$	294	$	—	$	—
Time deposits and certificates of deposit		3,852		—		3,852		—
Commercial paper		82,584		—		82,584		—
Corporate obligations		12,570		—		12,570		—
U.S. agency obligations		49,084		—		49,084		—
Restricted cash – money market funds		317		317		—		—
Available-for-sale investments:
Time deposits and certificates of deposit		101		—		101		—
Bankers’ acceptance drafts		1,722		—		1,722		—
Commercial paper		33,509		—		33,509		—
Corporate obligations		8,994		—		8,994		—
Group insurance contracts		5,950		—		5,950		—
Derivatives – currency forward contracts		3,492		—		3,492		—
Funds in investments and other assets:
Israeli pension assets		14,481		—		14,481		—
Derivatives – interest rate hedge – non-current		4,459		—		4,459		—
Deferred compensation plan assets:
Mutual funds and exchange traded funds		1,799		—		1,799		—
Money market securities		274		—		274		—
Total assets	$	223,482	$	611	$	222,871	$	—
Liabilities:
Derivatives – currency forward contracts	$	322	$	—	$	322	$	—
Reported as follows:
Assets:
Cash and cash equivalents, including restricted cash(1)	$	148,701	$	611	$	148,090	$	—
Short-term investments		44,326		—		44,326		—
Other current assets		3,492		—		3,492		—
Total current assets	$	196,519	$	611	$	195,908	$	—
Long-term investments(2)	$	5,950	$	—	$	5,950	$	—
Other assets		21,013		—		21,013		—
Total long-term assets	$	26,963	$	—	$	26,963	$	—
Liabilities:
Other current liabilities	$	322	$	—	$	322	$	—

⁽¹⁾ The cash and cash equivalent amounts presented in the table above do not include cash of $269,315 as of March 31, 2019.

⁽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, 2018 and are summarized as follows:

			Fair Value Measurements at Reporting Date Using
Description	December 31, 2018		Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents:
Money market funds	$	180,340	$	180,340	$	—	$	—
Time deposits and certificates of deposit		850		—		850		—
Commercial paper		2,687		—		2,687		—
U.S. agency obligations		3,418		—		3,418		—
Restricted cash – money market funds		110		110		—		—
Available-for-sale investments:
Time deposits and certificates of deposit		102		—		102		—
Bankers’ acceptance drafts		989		—		989		—
Asset-backed securities		9,113		—		9,113		—
Commercial paper		19,359		—		19,359		—
Corporate obligations		9,352		—		9,352		—
U.S. treasury obligations		13,298		—		13,298		—
U.S. agency obligations		21,613		—		21,613		—
Group insurance contracts		5,890		—		5,890		—
Derivatives – currency forward contracts		2,485		—		2,485		—
Funds in investments and other assets:
Israeli pension assets		14,408		—		14,408		—
Derivatives – interest rate hedge – non-current		6,083		—		6,083		—
Total assets	$	290,097	$	180,450	$	109,647	$	—
Liabilities:
Derivatives – currency forward contracts	$	1,168	$	—	$	1,168	$	—
Reported as follows:
Assets:
Cash and cash equivalents, including restricted cash(1)	$	187,405	$	180,450	$	6,955	$	—
Short-term investments		73,826		—		73,826		—
Other current assets		2,485		—		2,485		—
Total current assets	$	263,716	$	180,450	$	83,266	$	—
Long-term investments(2)	$	5,890	$	—	$	5,890	$	—
Other assets		20,491		—		20,491		—
Total long-term assets	$	26,381	$	—	$	26,381	$	—
Liabilities:
Other current liabilities	$	1,168	$	—	$	1,168	$	—

⁽¹⁾ The cash and cash equivalent amounts presented in the table above do not include cash of $456,940 as of December 31, 2018.

⁽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.

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Derivatives (Tables)

3 Months Ended

Mar. 31, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Summary of Primary Net Hedging Positions and Corresponding Fair Values

The following tables provide a summary of the primary net hedging positions and corresponding fair values held as of March 31, 2019 and December 31, 2018:

	March 31, 2019
Currency Hedged (Buy/Sell)	Gross Notional Value		Fair Value(1)
U.S. Dollar/Japanese Yen	$	39,022	$	302
U.S. Dollar/South Korean Won		54,077		1,424
U.S. Dollar/Euro		20,146		916
U.S. Dollar/U.K. Pound Sterling		10,921		125
U.S. Dollar/Taiwan Dollar		19,836		403
Total	$	144,002	$	3,170

	December 31, 2018
Currency Hedged (Buy/Sell)	Gross Notional Value		Fair Value(1)
U.S. Dollar/Japanese Yen	$	43,770	$	(478	)
U.S. Dollar/South Korean Won		59,149		570
U.S. Dollar/Euro		23,515		688
U.S. Dollar/U.K. Pound Sterling		11,827		323
U.S. Dollar/Taiwan Dollar		21,133		214
Total	$	159,394	$	1,317

⁽¹⁾  Represents the receivable (payable) 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	March 31, 2019			December 31, 2018
Derivative assets:
Foreign exchange contracts(1)	$	3,492		$	2,485
Foreign currency interest rate hedge(2)		4,459			6,083
Derivative liabilities:
Foreign exchange contracts(1)		(322	)		(1,168	)
Total net derivative asset designated as hedging instruments	$	7,629		$	7,400

⁽¹⁾ The derivative assets of $3,492 and $2,485 as of March 31, 2019 and December 31, 2018, respectively, related to foreign exchange contracts and are classified in other current assets in the consolidated balance sheet. The derivative liabilities of $322 and $1,168 as of March 31, 2019 and December 31, 2018, respectively, 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 foreign currency interest rate hedge assets of $4,459 and $6,083 as of March 31, 2019 and December 31, 2018, respectively, are classified in other assets in the consolidated balance sheet.

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

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

	Three Months Ended March 31,
Derivatives Designated as Cash Flow Hedging Instruments	2019		2018
Forward exchange contracts:
Net gain recognized in OCI(1)	$	67	$	66
Net gain (loss) reclassified from accumulated OCI into income(2)	$	949	$	(2,539	)

⁽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 March 31, 2019 and 2018. The tax effect of the gains or losses reclassified from accumulated OCI into income is immaterial.

Summary of Losses on Derivatives Not Designated as Cash Flow Hedging Instruments

The following table provides a summary of the gain (loss) on derivatives not designated as hedging instruments:

	Three Months Ended March 31,
Derivatives Not Designated as Hedging Instruments	2019		2018
Forward exchange contracts:
Net gain (loss) recognized in income(1)	$	57	$	(1,253	)

⁽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 other (expense) income.

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Inventories (Tables)

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories consist of the following:

	March 31, 2019		December 31, 2018
Raw materials	$	303,588	$	235,593
Work-in-process		76,560		61,908
Finished goods		95,485		87,188
	$	475,633	$	384,689

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Acquisitions (Tables)

3 Months Ended

Mar. 31, 2019

Electro Scientific Industries Inc [Member]

Summary of Purchase Price

The purchase price of ESI consisted of the following:

Cash paid for outstanding shares(1)	$	1,032,671
Settlement of share-based compensation awards(2)		30,630
Total purchase price		1,063,301
Less: Cash and cash equivalents acquired		(44,072	)
Total purchase price, net of cash and cash equivalents acquired	$	1,019,229

⁽¹⁾  Represents cash paid of $30.00 per share for approximately 34,422,361 shares of ESI common stock, without interest and subject to a deduction for any required withholding tax.

⁽²⁾  Represents the vested but not issued portion of ESI share-based compensation awards as of the acquisition date of February 1, 2019.

Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed

The following table summarizes the allocation of the preliminary purchase price to the fair values assigned to assets acquired and liabilities assumed at the date of the ESI Merger:

Current assets (excluding inventory)	$	209,194
Inventory		92,364
Intangible assets		318,600
Goodwill		471,403
Property, plant and equipment		52,891
Long-term assets		9,633
Total assets acquired		1,154,085
Current liabilities		51,479
Non-current deferred taxes		32,146
Other long-term liabilities		7,159
Total liabilities assumed		90,784
Fair value of assets acquired and liabilities assumed		1,063,301
Less: Cash and cash equivalents acquired		(44,072	)
Total purchase price, net of cash and cash equivalents acquired	$	1,019,229

Schedule of Consolidated Net Revenue and Earnings

The Company’s consolidated net revenue and earnings for the three months ended March 31, 2019 include the following amounts of revenue and earnings of ESI since the acquisition date:

	Three Months Ended March 31, 2019
Total net revenues	$	35,218
Net loss	$	(31,716	)
Net loss per share:
Basic	$	(0.59	)
Diluted	$	(0.59	)

Schedule of Unaudited Pro Forma Financial Information

The following unaudited pro forma financial information presents the combined results of operations of the Company as if the ESI Merger had occurred on January 1, 2018. The unaudited pro forma financial information is not necessarily indicative of what the Company’s condensed consolidated results of operations actually would have been had the acquisition occurred at the beginning of each year. In addition, the unaudited pro forma financial information does not attempt to project the future results of operations of the combined Company.

	Three Months Ended March 31,
	2019		2018
Total net revenues	$	478,069	$	660,513
Net income	$	49,135	$	101,633
Net income per share:
Basic	$	0.91	$	1.87
Diluted	$	0.90	$	1.84

Precisive, LLC [Member]

Allocation of Acquired Intangible Assets and Related Estimates of Useful Lives

The following table reflects the allocation of the acquired intangible assets and related estimate of useful lives:

Completed technology - Laser	$	257,900	12 years
Completed technology - Non-Laser		18,500	10 years
Trademarks and trade names		14,400	7 years
Customer relationships		25,400	10 years
Backlog		2,400	1 year
	$	318,600

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Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

The changes in the carrying amount of goodwill and accumulated impairment loss during the three months ended March 31, 2019 and year ended December 31, 2018 were as follows:

	Three Months Ended March 31, 2019									Twelve Months Ended December 31, 2018
	Gross Carrying Amount			Accumulated Impairment Loss			Net			Gross Carrying Amount			Accumulated Impairment Loss			Net
Beginning balance at January 1	$	731,272		$	(144,276	)	$	586,996		$	735,323		$	(144,276	)	$	591,047
Acquired goodwill(1)		471,403			—			471,403			—			—			—
Foreign currency translation		(1,068	)		—			(1,068	)		(4,051	)		—			(4,051	)
Ending balance at March 31, 2019 and December 31, 2018	$	1,201,607		$	(144,276	)	$	1,057,331		$	731,272		$	(144,276	)	$	586,996

⁽¹⁾ During the three months ended March 31, 2019, the Company recorded $471,403 of goodwill related to the ESI Merger.

Intangible Assets

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

As of March 31, 2019:	Gross		Accumulated Impairment Charges			Accumulated Amortization			Foreign Currency Translation			Net
Completed technology(1)	$	448,831	$	(105	)	$	(146,614	)	$	(162	)	$	301,950
Customer relationships(1)		308,144		(1,406	)		(68,738	)		(819	)		237,181
Patents, trademarks, trade names and other(1)		120,895		—			(40,976	)		41			79,960
	$	877,870	$	(1,511	)	$	(256,328	)	$	(940	)	$	619,091

⁽¹⁾ During the three months ended March 31, 2019, the Company recorded $318,600 of separately identified intangible assets related to the ESI Merger, of which $276,400 was completed technology, $25,400 was customer relationships and $16,800 was trademarks, trade names and backlog. Separately, on January 1, 2019, the Company reclassified $6,428 of gross favorable lease assets and $3,445 of related accumulated amortization from patents, trademarks, trade names and other to the right-of-use asset line in the balance sheet.

As of December 31, 2018:	Gross		Impairment Charges			Accumulated Amortization			Foreign Currency Translation			Net
Completed technology	$	172,431	$	(105	)	$	(137,283	)	$	(73	)	$	34,970
Customer relationships		282,744		(1,406	)		(63,788	)		(269	)		217,281
Patents, trademarks, trade names and other		110,523		—			(42,954	)		(13	)		67,556
	$	565,698	$	(1,511	)	$	(244,025	)	$	(355	)	$	319,807

Estimated Net Amortization Expense

Aggregate net amortization expense related to acquired intangible assets for future years is as follows:

Year	Amount
2019 (remaining)	$	51,638
2020		55,751
2021		47,958
2022		45,480
2023		45,121
2024		44,204
Thereafter		273,039

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Debt (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Schedule of Short-Term Debt

	March 31, 2019		December 31, 2018
Short-term debt:
Japanese lines of credit	$	2,175	$	2,724
Japanese receivables financing facility		1,020		665
Austrian loans due through March 2020		586		597
Term Loan Facility		6,500		—
	$	10,281	$	3,986

Schedule of Long-Term Debt

	March 31, 2019		December 31, 2018
Long-term debt:
Austrian loans due through March 2020 and other debt	$	83	$	86
Term Loan Facility, net(1)		976,740		343,756
	$	976,823	$	343,842

⁽¹⁾  Net of deferred financing fees, original issuance discount and repricing fee of $15,224 and $4,708 as of March 31, 2019 and December 31, 2018, respectively.

Schedule of Contractual Maturities of Debt Obligations

Contractual maturities of the Company’s debt obligations as of March 31, 2019 are as follows:

Year	Amount
2019 (remaining	$	8,656
2020		6,583
2021		6,500
2022		6,500
2023		354,964
2024		6,500
Thereafter		612,625

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Product Warranties (Tables)

3 Months Ended

Mar. 31, 2019

Guarantees and Product Warranties [Abstract]

Product Warranty Activities

Product warranty activities were as follows:

	Three Months Ended March 31,
	2019			2018
Beginning of period	$	10,399		$	10,104
Assumed product warranty liability from ESI Merger		7,177			—
Provision for product warranties		6,062			5,184
Direct and other charges to warranty liability		(6,705	)		(4,073	)
End of period(1)	$	16,933		$	11,215

⁽¹⁾  As of March 31, 2019, short-term product warranty of $13,843 and long-term product warranty of $3,090 were included within other current liabilities and other liabilities, respectively, within the accompanying condensed consolidated balance sheet. As of March 31, 2018, short-term product warranty of $10,856 and long-term product warranty of $359 were included within other current liabilities and other liabilities, respectively, within the accompanying condensed consolidated balance sheet.

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Net Income Per Share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Computation of Basic and Diluted Net Income Per Share

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

	Three Months Ended March 31,
	2019		2018
Numerator:
Net income	$	12,455	$	105,121
Denominator:
Shares used in net income per common share – basic		54,147,000		54,423,000
Effect of dilutive securities:
Restricted stock units, stock appreciation rights and shares issued under employee stock purchase plan		701,000		863,000
Shares used in net income per common share – diluted		54,848,000		55,286,000
Net income per common share:
Basic	$	0.23	$	1.93
Diluted	$	0.23	$	1.90

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Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2019

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 March 31,
	2019		2018
Cost of revenues	$	422	$	1,005
Research and development expense		810		722
Selling, general and administrative expense		8,038		8,699
Acquisition and integration related expense		18,568		—
Total pre-tax stock-based compensation expense	$	27,838	$	10,426

Summary of Activity for RSUs

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

	Three Months Ended March 31, 2019
	Outstanding RSUs			Weighted Average Grant Date Fair Value
RSUs – beginning of period		647,394		$	74.04
Assumed shares from ESI Merger		736,133		$	84.10
Accrued dividend shares		1,558		$	78.45
Granted		182,212		$	82.58
Vested		(274,898	)	$	67.57
Forfeited		(76,096	)	$	91.14
RSUs – end of period		1,216,303		$	81.81

Stock Appreciation Rights (SARs) [Member]

Summary of Activity for Outstanding and Exercisable Stock Appreciation Rights

The following table presents the activity for SARs under the Plan:

	Three Months Ended March 31, 2019
	Outstanding SARs			Weighted Average Grant Date Fair Value
SARs – beginning of period		177,538		$	28.52
Assumed SARs from ESI Merger		12,787		$	17.38
Exercised		(23,569	)	$	27.34
Forfeited or expired		(184	)	$	27.89
SARs Outstanding – end of period		166,572		$	27.86

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

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Net Revenues, Assets and Goodwill by Reportable Segment

The following table sets forth net revenues by reportable segment:

	Three Months Ended March 31,
	2019		2018
Vacuum & Analysis	$	234,355	$	348,344
Light & Motion		193,988		205,931
Equipment & Solutions		35,218		—
	$	463,561	$	554,275

The following table sets forth segment assets by reportable segment:

March 31, 2019:	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Corporate, Eliminations & Other			Total
Segment assets:
Accounts receivable	$	160,040	$	139,592	$	51,088	$	(14,730	)	$	335,990
Inventory, net		225,431		164,603		85,690		(91	)		475,633
Total segment assets	$	385,471	$	304,195	$	136,778	$	(14,821	)	$	811,623

December 31, 2018:	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Corporate, Eliminations & Other			Total
Segment assets:
Accounts receivable	$	171,604	$	140,658	$	—	$	(16,808	)	$	295,454
Inventory, net		222,965		161,658		—		66			384,689
Total segment assets	$	394,569	$	302,316	$	—	$	(16,742	)	$	680,143

Goodwill associated with each of the Company’s reportable segments is as follows:

	March 31, 2019		December 31, 2018
Reportable segment:
Vacuum & Analysis	$	196,937	$	197,126
Light & Motion		388,896		389,870
Equipment & Solutions		471,498		—
Total goodwill	$	1,057,331	$	586,996

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 March 31,
	2019		2018
Gross profit by reportable segment:
Vacuum & Analysis	$	98,139	$	158,500
Light & Motion		92,741		104,355
Equipment & Solutions		7,238		—
Total gross profit by reportable segment		198,118		262,855
Operating expenses:
Research and development		38,933		34,857
Selling, general and administrative		82,455		82,949
Fees and expenses related to incremental term loan		5,847		—
Acquisition and integration costs		30,167		—
Restructuring		223		1,220
Customer contract obligation		1,700		—
Environmental costs		—		1,000
Amortization of intangible assets		15,727		11,190
Income from operations		23,066		131,639
Interest and other expense, net		7,730		4,897
Income before income taxes		15,336		126,742
Provision for income taxes		2,881		21,621
Net income	$	12,455	$	105,121

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 months ended March 31, 2019 and 2018:

	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Total
Three Months Ended March 31, 2019:
Capital expenditures	$	7,488	$	5,154	$	1,887	$	14,529
Three Months Ended March 31, 2018:
Capital expenditures	$	6,197	$	3,193	$	—	$	9,390

The following table sets forth depreciation and amortization by reportable segment for the three months ended March 31, 2019 and 2018:

	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Total
Three Months Ended March 31, 2019:
Depreciation and amortization	$	4,045	$	14,140	$	7,026	$	25,211
Three Months Ended March 31, 2018
Depreciation and amortization	$	5,129	$	15,363	$	—	$	20,492

Reconciliation of Segment Assets to Consolidated Total Assets

The following is a reconciliation of segment assets to consolidated total assets:

	March 31, 2019		December 31, 2018
Total segment assets	$	811,623	$	680,143
Cash and cash equivalents and investments		472,692		728,461
Other current assets		86,387		65,790
Property, plant and equipment, net		251,424		194,367
Right-of-use asset		65,628		—
Goodwill and intangible assets, net		1,676,422		906,803
Other assets		48,562		38,682
Consolidated total assets	$	3,412,738	$	2,614,246

Schedule of Net Revenues and Long-Lived Assets by Geographic Regions

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

	Three Months Ended March 31,
	2019		2018
Net revenues:
United States	$	224,347	$	276,720
Korea		35,802		54,011
Japan		42,102		58,274
Asia (excluding Korea and Japan)		101,327		101,384
Europe		59,983		63,886
	$	463,561	$	554,275

	March 31, 2019		December 31, 2018
Long-lived assets:(1)
United States	$	198,747	$	146,687
Europe		29,983		26,794
Asia		57,523		50,572
	$	286,253	$	224,053

⁽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 Company groups its product offerings into three groups based upon the similarity of product function as follows:

	Three Months Ended March 31,
	2019		2018
Advanced Manufacturing Components	$	371,345	$	496,677
Global Service		66,198		57,598
Advanced Manufacturing Systems		26,018		—
	$	463,561	$	554,275

XML

Restructuring (Tables)

3 Months Ended

Mar. 31, 2019

Restructuring and Related Activities [Abstract]

Schedule of Company's Restructuring Activity

Restructuring activities were as follows:

	Three Months Ended March 31,
	2019			2018
Beginning of period	$	2,632		$	3,244
Charged to expense		223			1,220
Payments and adjustments		(252	)		(1,806	)
End of period	$	2,603		$	2,658

XML

Recently Issued Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset	$ 65,628
Short-term lease liability	19,459
Long-term lease liability	$ 49,392
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset		$ 71,042
Short-term lease liability		20,192
Long-term lease liability		$ 54,147

XML

Leases - Additional Information (Detail) $ in Thousands	Mar. 31, 2019 USD ($)
Leases [Abstract]
Right-of-Use Asset,Operating Lease	$ 65,628
Short-term lease liability	19,459
Long-term lease liability	$ 49,392

XML

Leases - Schedule Of Elements Of Lease Expense (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating lease cost	$ 5,377
Operating cash flows used for operating leases	$ 5,711
Weighted average discount rate	3.81%
Weighted average remaining lease term	4 years 10 months 24 days

XML

Leases - Schedule Of Future Lease Payments (Detail) $ in Thousands	Mar. 31, 2019 USD ($)
Leases [Abstract]
2019 (remaining)	$ 16,831
2020	18,608
2021	12,687
2022	7,518
2023	6,315
Thereafter	13,761
Total lease payments	75,720
Total lease payments	75,720
Less: imputed interest	6,869
Total operating lease liabilities	$ 68,851

XML

Leases - Minimum Lease Payments under Operating Leases (Detail) $ in Thousands	Dec. 31, 2018 USD ($)
Leases [Abstract]
2019	$ 20,106
2020	17,142
2021	10,325
2022	5,573
2023	4,411
Thereafter	8,739
Total minimum lease payments	$ 66,296

XML

Revenue from Contracts with Customers - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Accounting Standards Codification Topic 606 adjustment [Member]
Change in Contract with Customer, Liability [Line Items]
Contract assets	$ 3,624	$ 3,624

XML

Revenue from Contracts with Customers - Schedule of Deferred Revenue and Customer Advances by Arrangement (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Change in Contract with Customer, Liability [Line Items]
Beginning balance, January 1	$ 17,474
Additions to deferred revenue and customer advances	17,219
Amount of deferred revenue and customer advances recognized in income	(13,933)
Ending balance, March 31	24,074
Electro Scientific Industries Inc [Member]
Change in Contract with Customer, Liability [Line Items]
Deferred revenue and customer advances assumed	$ 3,314

XML

Revenue from Contracts with Customers - Schedule of Deferred Revenue and Customer Advances by Arrangement (Parenthetical) (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Change in Contract with Customer, Liability [Line Items]
Deferred revenue and customer advances	$ 21,056		$ 14,246
Long-term deferred revenue	3,018	$ 3,228
Deferred Revenue [Member]
Change in Contract with Customer, Liability [Line Items]
Deferred revenue and customer advances	13,322	8,134
Customer Advances [Member]
Change in Contract with Customer, Liability [Line Items]
Deferred revenue and customer advances	$ 7,734	$ 6,112

XML

Revenue from Contracts with Customers - Summary of Revenue from Contracts with Customers (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Net revenues	$ 463,561	$ 554,275
Vacuum & Analysis [Member]
Disaggregation of Revenue [Line Items]
Net revenues	234,355	348,344
Light & Motion [Member]
Disaggregation of Revenue [Line Items]
Net revenues	193,988	205,931
Equipment & Solutions [Member]
Disaggregation of Revenue [Line Items]
Net revenues	35,218
Products [Member]
Disaggregation of Revenue [Line Items]
Net revenues	397,363	496,677
Products [Member] | Vacuum & Analysis [Member]
Disaggregation of Revenue [Line Items]
Net revenues	192,648	304,336
Products [Member] | Light & Motion [Member]
Disaggregation of Revenue [Line Items]
Net revenues	178,697	192,341
Products [Member] | Equipment & Solutions [Member]
Disaggregation of Revenue [Line Items]
Net revenues	26,018
Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	66,198	57,598
Services [Member] | Vacuum & Analysis [Member]
Disaggregation of Revenue [Line Items]
Net revenues	41,707	44,008
Services [Member] | Light & Motion [Member]
Disaggregation of Revenue [Line Items]
Net revenues	15,291	$ 13,590
Services [Member] | Equipment & Solutions [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 9,200

XML

Investments - Investments Classified as Short-Term Available-for-Sale Investments (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale investments	$ 44,326	$ 73,826
Time Deposits and Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale investments	101	102
Bankers' Acceptance Drafts [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale investments	1,722	989
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale investments		9,113
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale investments	33,509	19,359
Corporate Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale investments	$ 8,994	9,352
U.S. Treasury Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale investments		13,298
U.S. Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale investments		$ 21,613

XML

Investments - Investments Classified as Long-Term Available-for-Sale Investments and Long-Term Cost Method Investments (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Schedule of Available-for-sale Securities and Cost-method Investments [Line Items]
Investments classified as long-term	$ 10,350	$ 10,290
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	5,950	5,890
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	$ 4,400

XML

Investments - Gross Unrealized Gains and (Losses) Aggregated by Investment Category (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	$ 44,569	$ 73,994
Investments, Gross Unrealized Gains	4	7
Investments, Gross Unrealized (Losses)	(247)	(175)
Investments, Estimated Fair Value	44,326	73,826
Time Deposits and Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	99	102
Investments, Gross Unrealized Gains	2
Investments, Estimated Fair Value	101	102
Bankers' Acceptance Drafts [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	1,722	989
Investments, Estimated Fair Value	1,722	989
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost		9,121
Investments, Gross Unrealized Gains		1
Investments, Gross Unrealized (Losses)		(9)
Investments, Estimated Fair Value		9,113
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	33,752	19,504
Investments, Gross Unrealized Gains	1
Investments, Gross Unrealized (Losses)	(244)	(145)
Investments, Estimated Fair Value	33,509	19,359
Corporate Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	8,996	9,367
Investments, Gross Unrealized Gains	1
Investments, Gross Unrealized (Losses)	(3)	(15)
Investments, Estimated Fair Value	8,994	9,352
U.S. Treasury Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost		13,294
Investments, Gross Unrealized Gains		4
Investments, Estimated Fair Value		13,298
U.S. Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost		21,617
Investments, Gross Unrealized Gains		2
Investments, Gross Unrealized (Losses)		(6)
Investments, Estimated Fair Value		21,613
Group Insurance Contracts [Member] | Long Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	5,582	5,546
Investments, Gross Unrealized Gains	368	344
Investments, Estimated Fair Value	$ 5,950	$ 5,890

XML

Fair Value Measurements - Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	$ 44,326	$ 73,826
Short-term investments	44,326	73,826
Derivatives - currency forward contracts		2,485
Other assets	48,562	38,682
Derivatives - liabilities		1,168
Foreign Exchange Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - currency forward contracts	3,492
Derivatives - liabilities	322
Interest Rate Hedge [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - interest rate hedge - non-current	4,459	6,083
Derivatives - currency forward contracts	4,459	6,083
Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	223,482	290,097
Cash and cash equivalents, including restricted cash (1)	148,701	187,405
Short-term investments	44,326	73,826
Derivatives - currency forward contracts	3,492	2,485
Total current assets	196,519	263,716
Available-for-sale investments	5,950	5,890
Other assets	21,013	20,491
Total long-term assets	26,963	26,381
Derivatives - liabilities	322	1,168
Fair Value Measurements, Recurring [Member] | Foreign Exchange Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - currency forward contracts	3,492
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	4,459	6,083
Fair Value Measurements, Recurring [Member] | Currency Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - currency forward contracts		2,485
Derivatives - liabilities	322	1,168
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	294	180,340
Restricted cash - money market funds	317	110
Deferred compensation plan assets	274
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	3,852	850
Available-for-sale investments	101	102
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	49,084	3,418
Available-for-sale investments		21,613
Bankers' Acceptance Drafts [Member] | Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	1,722	989
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		9,113
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		13,298
Mutual Funds and Exchange Traded Funds [Member] | Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan assets	1,799
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]
Total assets	611	180,450
Cash and cash equivalents, including restricted cash (1)	611	180,450
Total current assets	611	180,450
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	294	180,340
Restricted cash - money market funds	317	110
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	222,871	109,647
Cash and cash equivalents, including restricted cash (1)	148,090	6,955
Short-term investments	44,326	73,826
Derivatives - currency forward contracts	3,492	2,485
Total current assets	195,908	83,266
Available-for-sale investments	5,950	5,890
Other assets	21,013	20,491
Total long-term assets	26,963	26,381
Derivatives - liabilities	322	1,168
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements, Recurring [Member] | Foreign Exchange Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - currency forward contracts	3,492
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	4,459	6,083
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 - currency forward contracts		2,485
Derivatives - liabilities	322	1,168
Significant Other Observable Inputs (Level 2) [Member] | Money Market Funds [Member] | Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan assets	274
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	3,852	850
Available-for-sale investments	101	102
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	49,084	3,418
Available-for-sale investments		21,613
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]
Available-for-sale investments	1,722	989
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		9,113
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		13,298
Significant Other Observable Inputs (Level 2) [Member] | Mutual Funds and Exchange Traded Funds [Member] | Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan assets	1,799
Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	33,509	19,359
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	82,584	2,687
Available-for-sale investments	33,509	19,359
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	82,584	2,687
Available-for-sale investments	33,509	19,359
Corporate Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	8,994	9,352
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	12,570
Available-for-sale investments	8,994	9,352
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	12,570
Available-for-sale investments	8,994	9,352
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	5,950
Available-for-sale investments		5,890
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	5,950
Available-for-sale investments		5,890
Israeli Pension Assets [Member] | Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Pension assets	14,481	14,408
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]
Pension assets	$ 14,481	$ 14,408

XML

Fair Value Measurements - Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis (Parenthetical) (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
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	$ 418,016	$ 644,345	$ 340,888	$ 333,887
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	$ 269,315	$ 456,940

XML

Derivatives - Additional Information (Detail) - USD ($)		3 Months Ended
	Sep. 30, 2016	Mar. 31, 2019	Dec. 31, 2018
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		$ 144,002,000	$ 159,394,000
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		2.00%
Interest rate swap agreement, maturity date	Sep. 30, 2020
Interest rate swap agreement, notional amount		$ 290,000,000	290,000,000
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 under the Credit Agreement, as described further in Note 11. This hedge fixes the interest rate paid on the hedged debt at 1.198% per annum plus the applicable credit spread, which was 2.0% as of March 31, 2019, through September 30, 2020.
Interest rate swap agreement, fair value		$ 4,459,000	$ 6,083,000
Cash Flow Hedging [Member] | Interest Rate Hedge [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate swap agreement, interest rate	1.198%

XML

Derivatives - Summary of Primary Net Hedging Positions and Corresponding Fair Values (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	$ 144,002	$ 159,394
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	3,170	1,317
Forward Exchange Contracts [Member] | U.S. Dollar/Japanese Yen [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	39,022	43,770
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	302	(478)
Forward Exchange Contracts [Member] | U.S. Dollar/South Korean Won [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	54,077	59,149
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	1,424	570
Forward Exchange Contracts [Member] | U.S. Dollar/Euro [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	20,146	23,515
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	916	688
Forward Exchange Contracts [Member] | U.S. Dollar/U.K. Pound Sterling [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	10,921	11,827
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	125	323
Forward Exchange Contracts [Member] | U.S. Dollar/Taiwan Dollar [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	19,836	21,133
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	$ 403	$ 214

XML

Derivatives - Summary of Fair Value Amounts of Company's Derivative Instruments (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Derivative assets		$ 2,485
Derivative liabilities		(1,168)
Total net derivative asset designated as hedging instruments	$ 3,170	1,317
Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Total net derivative asset designated as hedging instruments	7,629	7,400
Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	3,492
Derivative liabilities	(322)
Foreign Exchange Contracts [Member] | Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	3,492	2,485
Derivative liabilities	(322)	(1,168)
Interest Rate Hedge [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	4,459	6,083
Interest Rate Hedge [Member] | Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	$ 4,459	$ 6,083

XML

Derivatives - Summary of Fair Value Amounts of Company's Derivative Instruments (Parenthetical) (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Derivative assets classified in other current assets		$ 2,485
Derivative liabilities classified in other current liabilities		1,168
Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative assets classified in other current assets	$ 3,492
Derivative liabilities classified in other current liabilities	322
Interest Rate Hedge [Member]
Derivatives, Fair Value [Line Items]
Derivative assets classified in other current assets	$ 4,459	$ 6,083

XML

Derivatives - Summary of Gains (Losses) on Derivatives Designated as Cash Flow Hedging Instruments (Detail) - Forward Exchange Contracts [Member] - Cash Flow Hedging [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Net gain recognized in OCI	$ 67	$ 66
Net gain (loss) reclassified from accumulated OCI into income	$ 949	$ (2,539)

XML

Derivatives - Summary of Losses on Derivatives Not Designated as Cash Flow Hedging Instruments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Forward Exchange Contracts [Member]
Derivative Instruments Gain Loss Not Designated As Hedging Instruments [Line Items]
Net gain (loss) recognized in income	$ 57	$ (1,253)

XML

Inventories - Summary of Inventories (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Raw materials	$ 303,588	$ 235,593
Work-in-process	76,560	61,908
Finished goods	95,485	87,188
Inventories	$ 475,633	$ 384,689

XML

Acquisitions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Feb. 01, 2019	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Business Acquisition [Line Items]
Business acquisition share price	$ 30.00
Stock-based compensation expense		$ 27,838	$ 10,426
Acquisition and integration costs		6,764
Electro Scientific Industries Inc [Member]
Business Acquisition [Line Items]
Business acquisition share price	$ 30.00
Business acquisition, total cash consideration	$ 1,032,671
Non Cash Consideration related to share based compensation awards	30,630
Total Purchase Consideration	$ 1,063,301
Fair value write-up of acquired finished goods inventory		8,383
Incremental costs of sales charge		5,140
Fair value write-up of acquired property, plant and equipment				$ 26,667
Compensation expense		2,701
Stock-based compensation expense		$ 14,023

XML

Acquisitions - Summary of Purchase Price (Detail) - USD ($) $ in Thousands		3 Months Ended
	Feb. 01, 2019	Mar. 31, 2019
Acquisition Date [Line Items]
Total purchase price, net of cash and cash equivalents acquired		$ 988,599
Electro Scientific Industries Inc [Member]
Acquisition Date [Line Items]
Cash paid for outstanding shares	$ 1,032,671
Settlement of share-based compensation awards	30,630
Total purchase price	1,063,301
Less: Cash and cash equivalents acquired	(44,072)
Total purchase price, net of cash and cash equivalents acquired	$ 1,019,229

XML

Acquisitions - Summary of Purchase Price (Parenthetical) (Detail)	Feb. 01, 2019 $ / shares shares
Business Combinations [Abstract]
Business acquisition share price | $ / shares	$ 30.00
Business acquisition number of shares acquired | shares	34,422,361

XML

Acquisitions - Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands		3 Months Ended
	Feb. 01, 2019	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Acquisition Date [Line Items]
Goodwill		$ 1,057,331	$ 586,996	$ 591,047
Total purchase price, net of cash and cash equivalents acquired		$ 988,599
Electro Scientific Industries Inc [Member]
Acquisition Date [Line Items]
Current assets (excluding inventory)	$ 209,194
Inventory	92,364
Intangible assets	318,600
Goodwill	471,403
Property, plant and equipment	52,891
Long-term assets	9,633
Total assets acquired	1,154,085
Current liabilities	51,479
Non-current deferred taxes	32,146
Other long-term liabilities	7,159
Total liabilities assumed	90,784
Fair value of assets acquired and liabilities assumed	1,063,301
Less: Cash and cash equivalents acquired	(44,072)
Total purchase price, net of cash and cash equivalents acquired	$ 1,019,229

XML

Acquisitions and Dispositions - Allocation of Acquired Intangible Assets and Related Estimates of Useful Lives (Detail) - Electro Scientific Industries Inc [Member] - USD ($) $ in Thousands		3 Months Ended
	Feb. 01, 2019	Mar. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 318,600	$ 318,600
Completed Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price		276,400
Completed Technology [Member] | Lasers Products [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 257,900
Estimated useful life of finite-lived intangible assets	12 years
Completed Technology [Member] | Non Laser Products [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 18,500
Estimated useful life of finite-lived intangible assets	10 years
Trademarks and Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 14,400
Estimated useful life of finite-lived intangible assets	7 years
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 25,400	$ 25,400
Estimated useful life of finite-lived intangible assets	10 years
Backlog [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 2,400
Estimated useful life of finite-lived intangible assets	1 year

XML

Acquisitions and Dispositions - Schedule of Consolidated Net Revenue and Earnings (Detail) - Electro Scientific Industries Inc [Member] $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) $ / shares
Acquisition Date [Line Items]
Total net revenues | $	$ 35,218
Net loss | $	$ (31,716)
Net loss per share:
Basic | $ / shares	$ (0.59)
Diluted | $ / shares	$ (0.59)

XML

Acquisitions and Dispositions - Schedule of Unaudited Pro Forma Financial Information (Detail) - Electro Scientific Industries Inc [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Acquisition Date [Line Items]
Total net revenues	$ 478,069	$ 660,513
Net income	$ 49,135	$ 101,633
Net income per share:
Basic	$ 0.91	$ 1.87
Diluted	$ 0.90	$ 1.84

XML

Goodwill and Intangible Assets - Goodwill (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Beginning balance, Goodwill Gross Carrying Amount	$ 731,272	$ 735,323
Acquired goodwill	471,403
Foreign currency translation, Gross Carrying Amount	(1,068)	(4,051)
Ending balance, Goodwill Gross Carrying Amount	1,201,607	731,272
Beginning balance, Accumulated Impairment Loss	(144,276)	(144,276)
Acquired goodwill	0	0
Foreign currency translation, Accumulated Impairment Loss	0	0
Ending balance, Accumulated Impairment Loss	(144,276)	(144,276)
Beginning balance, Goodwill Net	586,996	591,047
Foreign currency translation, Net	(1,068)	(4,051)
Ending balance, Goodwill Net	$ 1,057,331	$ 586,996

XML

Goodwill and Intangible Assets - Goodwill (Parenthetical) (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Goodwill [Line Items]
Acquired goodwill	$ 471,403
Electro Scientific Industries Inc [Member]
Goodwill [Line Items]
Acquired goodwill	$ 471,403

XML

Goodwill and Intangible Assets - Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	$ 877,870	$ 565,698
Impairment Charges	(1,511)	(1,511)
Accumulated Amortization	(256,328)	(244,025)
Foreign Currency Translation	(940)	(355)
Intangible assets, net	619,091	319,807
Completed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	448,831	172,431
Impairment Charges	(105)	(105)
Accumulated Amortization	(146,614)	(137,283)
Foreign Currency Translation	(162)	(73)
Intangible assets, net	301,950	34,970
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	308,144	282,744
Impairment Charges	(1,406)	(1,406)
Accumulated Amortization	(68,738)	(63,788)
Foreign Currency Translation	(819)	(269)
Intangible assets, net	237,181	217,281
Patents, Trademarks, Trade Names and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	120,895	110,523
Accumulated Amortization	(40,976)	(42,954)
Foreign Currency Translation	41	(13)
Intangible assets, net	$ 79,960	$ 67,556

XML

Goodwill and Intangible Assets - Intangible Assets (Parenthetical) (Detail) - USD ($) $ in Thousands		3 Months Ended
	Feb. 01, 2019	Mar. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization		$ 256,328	$ 244,025
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization		68,738	63,788
Patents, Trademarks, Trade Names and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization		40,976	$ 42,954
Electro Scientific Industries Inc [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 318,600	318,600
Finite lived intangible asset , gross favorable lease		6,428
Electro Scientific Industries Inc [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 25,400	25,400
Electro Scientific Industries Inc [Member] | Patents, Trademarks, Trade Names and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization		3,445
Electro Scientific Industries Inc [Member] | Completed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price		276,400
Electro Scientific Industries Inc [Member] | Trademarks Tradenames and Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price		$ 16,800

XML

Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 15,727	$ 11,190
Amortization income from unfavorable lease commitments	$ 0	$ 407

XML

Goodwill and Intangible Assets - Estimated Net Amortization Expense (Detail) $ in Thousands	Mar. 31, 2019 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2019 (remaining)	$ 51,638
2020	55,751
2021	47,958
2022	45,480
2023	45,121
2024	44,204
Thereafter	$ 273,039

XML

Debt - Additional Information (Detail) - USD ($)			3 Months Ended		12 Months Ended
	Feb. 01, 2019	Sep. 30, 2016	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Debt Instrument [Line Items]
Interest expense			$ 9,119,000	$ 5,430,000
Interest Rate Hedge [Member]
Debt Instrument [Line Items]
Interest rate swap agreement, maturity date		Sep. 30, 2020
Interest rate swap agreement, notional amount			$ 290,000,000		$ 290,000,000
Interest rate swap agreement, credit spread rate			2.00%
Revolving Lines of Credit [Member]
Debt Instrument [Line Items]
Borrowing capacity in the form of letters of credit			$ 11,275,000
Revolving Lines of Credit [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Line of credit base interest rate			1.25%
Austrian [Member]
Debt Instrument [Line Items]
Interest on loans payable			Semi-annually
Austrian [Member] | Minimum [Member]
Debt Instrument [Line Items]
Loan interest rate			0.00%
Austrian [Member] | Maximum [Member]
Debt Instrument [Line Items]
Loan interest rate			0.75%
2016 Term Loan Facility [Member] | Repricing Amendment [Member]
Debt Instrument [Line Items]
Number of repricing amendments			4
2016 Term Loan Facility [Member] | Repricing Amendment [Member] | LIBOR [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate			1.75%
2016 Term Loan Facility [Member] | Repricing Amendment [Member] | LIBOR [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate			4.00%
2016 Term Loan Facility [Member] | Repricing Amendment [Member] | LIBOR Floor Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate			0.75%
2016 Term Loan Facility [Member] | 2019 Incremental Term Loan Facility [Member] | LIBOR [Member]
Debt Instrument [Line Items]
LIBOR floor rate			1.00%		0.75%
2016 Term Loan Facility [Member] | 2019 Incremental Term Loan Facility [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate			2.00%		1.75%
2016 Term Loan Facility [Member] | Secured Debt Repricing Amendment 2 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate			4.50%
Newport [Member] | Revolving Lines of Credit [Member]
Debt Instrument [Line Items]
Total borrowings outstanding			$ 3,195,000		$ 3,389,000
Newport [Member] | Asset Based Credit Agreement [Member]
Debt Instrument [Line Items]
Debt issuance cost capitalized			$ 785,000
Contractual term			5 years
Capitalized debt issuance cost			$ 216,000
Newport [Member] | Asset Based Credit Agreement [Member] | Deutsche Bank AG New York [Member]
Debt Instrument [Line Items]
Termination of loans			50,000,000
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 at a rate per annum equal to, at the Company’s option, any of the following, plus, in each case, an applicable margin: (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 0.00%; 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, with a floor of 0.00%. The initial applicable margin for borrowings under the ABL Facility is 0.50% with respect to base rate borrowings and 1.50% with respect to LIBOR borrowings.
Percentage of borrowing based on eligible accounts			85.00%
Percentage of net book value of eligible inventory			20.00%
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			0.25%
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] | Interest Rate Floor [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate			0.00%
Newport [Member] | Asset Based Credit Agreement [Member] | Secured Debt [Member] | Initial Margin Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate			0.50%
Newport [Member] | Asset Based Credit Agreement [Member] | Secured Debt [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate			1.50%
Newport [Member] | Asset Based Credit Agreement [Member] | Revolving Lines of Credit [Member]
Debt Instrument [Line Items]
Secured term loan, face amount			$ 100,000,000
Newport [Member] | Asset Based Credit Agreement [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Borrowing capacity in the form of letters of credit			25,000,000
Newport [Member] | 2016 Term Loan Facility [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; 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. The Company has elected the interest rate as described in clause (b). The Credit Agreement provides that all loans will be determined by reference to the Base Rate if the LIBOR rate cannot be ascertained, if regulators impose material restrictions on the authority of a lender to make LIBOR rate loans, or for other reasons. 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%
Debt instrument, maturity date			Apr. 29, 2023
Newport [Member] | 2016 Term Loan Facility [Member] | Secured Debt [Member] | Federal Funds Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate			0.50%
Newport [Member] | 2016 Term Loan Facility [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] | 2016 Term Loan Facility [Member] | Secured Debt [Member] | Floor Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate			1.75%
Newport [Member] | 2016 Term Loan Facility [Member] | Secured Debt [Member] | LIBOR Floor Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate			0.75%
Newport [Member] | 2016 Term Loan Facility [Member] | 2019 Incremental Term Loan Facility [Member]
Debt Instrument [Line Items]
Deferred finance fees, original issue discount and re-pricing fee, gross			$ 11,362,000
Deferred finance fees, original issue discount and re-pricing fee, net			11,244,000
Newport [Member] | 2016 Term Loan Facility [Member] | Secured Debt Repricing Amendment 2 [Member]
Debt Instrument [Line Items]
Secured term loan, face amount			348,464,000
Debt instrument, prepaid principal amount			425,000,000
Debt instrument, prepaid principal amount			6,536,000
Newport [Member] | 2016 Term Loan Facility [Member] | Secured Debt Repricing Amendment 1 [Member]
Debt Instrument [Line Items]
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			3,980,000
Newport [Member] | 2016 Term Loan Facility [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	$ 290,000,000
Interest rate swap agreement, interest rate		1.198%
Interest rate swap agreement, credit spread rate			2.00%
Interest rate swap agreement, fair value			$ 4,459,000
Newport [Member] | 2019 Incremental Term Loan Facility [Member] | Secured Debt Repricing Amendment 1 [Member]
Debt Instrument [Line Items]
Secured term loan, face amount			$ 650,000,000
Debt instrument, interest rate			4.70%
Term loan maturity date			Feb. 01, 2026
Debt instrument, pre-payment premium percentage			1.00%
Newport [Member] | 2019 Incremental Term Loan Facility [Member] | Secured Debt Repricing Amendment 1 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, quarterly payment percentage			0.25
Electro Scientific Industries Inc [Member] | 2019 Incremental Term Loan Facility [Member] | Definitive Merger Agreement[Member]
Debt Instrument [Line Items]
Debt instrument, interest rate terms	The 2019 Incremental Term Loan Facility matures on February 1, 2026 and bears interest at a rate per annum equal to, at the Company's option, a base rate or LIBOR rate (as described above) plus, in each case, an applicable margin equal to 1.25% with respect to base rate borrowings and 2.25% with respect to LIBOR borrowings.
Debt instrument, issue discount percentage on principal	1.00%
Term loan maturity date	Feb. 01, 2026
Electro Scientific Industries Inc [Member] | 2019 Incremental Term Loan Facility [Member] | Maximum [Member] | Definitive Merger Agreement[Member]
Debt Instrument [Line Items]
Business acquisition, term loan debt financing	$ 650,000
Electro Scientific Industries Inc [Member] | 2019 Incremental Term Loan Facility [Member] | LIBOR [Member] | Definitive Merger Agreement[Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	2.25%
Electro Scientific Industries Inc [Member] | 2019 Incremental Term Loan Facility [Member] | Base Rate [Member] | Definitive Merger Agreement[Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	1.25%

XML

Debt - Schedule of Short Term Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Short-term Debt [Line Items]
Short term debt	$ 10,281	$ 3,986
Short term debt	10,281	3,986
Term Loan Facility [Member]
Short-term Debt [Line Items]
Short term debt	6,500
Japan [Member] | Line of Credit [Member]
Short-term Debt [Line Items]
Short term debt	2,175	2,724
Japan [Member] | Receivables Financing Facility [Member]
Short-term Debt [Line Items]
Short term debt	1,020	665
Austrian [Member] | Loans Due Through March 2020 and other debt [Member]
Short-term Debt [Line Items]
Short term debt	$ 586	$ 597

XML

Debt - Schedule of Long Term Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long term debt	$ 976,823	$ 343,842
Term Loan Facility, Net [Member]
Debt Instrument [Line Items]
Long term debt	976,740	343,756
Loans Due Through March 2020 and other debt [Member] | Austrian [Member]
Debt Instrument [Line Items]
Long term debt	$ 83	$ 86

XML

Debt - Schedule of Long Term Debt (Parenthetical) (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Term Loan Facility, Net [Member]
Debt Instrument [Line Items]
Deferred financing fees, original issuance discount and re-pricing fee	$ 15,224	$ 4,708

XML

Debt - Schedule of Contractual Maturities of Debt Obligations (Detail)	Mar. 31, 2019 USD ($)
Maturities of Long-term Debt [Abstract]
2019 (remaining)	$ 8,656
2020	6,583
2021	6,500
2022	6,500
2023	354,964
2024	6,500
Thereafter	$ 612,625

XML

Product Warranties - Product Warranty Activities (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Product Warranty Liability [Line Items]
Beginning balance	$ 10,399	$ 10,104
Provision for product warranties	6,062	5,184
Direct and other charges to warranty liability	(6,705)	(4,073)
Ending balance	16,933	$ 11,215
Electro Scientific Industries Inc [Member]
Product Warranty Liability [Line Items]
Assumed product warranty liability from ESI Merger	$ 7,177

XML

Product Warranties - Product Warranty Activities (Parenthetical) (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018
Guarantees [Abstract]
Short-term product warranty	$ 13,843	$ 10,856
Long-term product warranty	$ 3,090	$ 359

XML

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Effective tax rate	18.80%	17.10%
Accrued interest on unrecognized tax benefits	$ 543		$ 568
Gross unrecognized tax benefits excluding interest and penalties	40,725		$ 32,684
Net unrecognized tax benefits excluding interest and penalties	33,085
Net unrecognized tax benefits, excluding interest and penalties, related to foreign tax positions	$ 1,452

XML

Net Income Per Share - Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Numerator:
Net income	$ 12,455	$ 105,121
Denominator:
Shares used in net income per common share - basic	54,147,000	54,423,000
Effect of dilutive securities:
Restricted stock units, stock appreciation rights and shares issued under employee stock purchase plan	701,000	863,000
Shares used in net income per common share - diluted	54,848,000	55,286,000
Net income per common share:
Basic	$ 0.23	$ 1.93
Diluted	$ 0.23	$ 1.90

XML

Net Income Per Share - Additional Information (Detail) - shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Restricted Stock Units (RSUs) [Member]
Earnings Per Share [Line Items]
Number of shares excluded from computation of diluted earnings per share	128,200	380

XML

Stock-Based Compensation - Additional Information (Detail) - USD ($)		3 Months Ended
	Apr. 29, 2016	Mar. 31, 2019	Mar. 31, 2018
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		$ 31,356
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units, granted		182,212	122,831
Restricted stock units, weighted average grant date fair value		$ 82.58	$ 109.62
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		326,283
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units, granted		0	0
Newport [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued as per merger agreement		748,920
Newport [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued as per merger agreement	736,133
Newport [Member] | Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued as per merger agreement	12,787

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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
	Mar. 31, 2019	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total pre-tax stock-based compensation expense	$ 27,838	$ 10,426
Cost of Revenues [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total pre-tax stock-based compensation expense	422	1,005
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	810	722
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	8,038	$ 8,699
Acquisition and Integration Related Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total pre-tax stock-based compensation expense	$ 18,568

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Stock-Based Compensation - Summary of Activity for RSUs (Detail) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs/SARs - beginning of period	647,394
Granted	182,212	122,831
Vested	(274,898)
Forfeited	(76,096)
RSUs/SARs - end of period	1,216,303
RSUs/SARs, Weighted Average Grant Date Fair Value, Beginning of period	$ 74.04
Weighted Average Grant Date Fair Value, Granted	82.58	$ 109.62
Weighted Average Grant Date Fair Value, Vested	67.57
Weighted Average Grant Date Fair Value, Forfeited	91.14
RSUs/SARs, Weighted Average Grant Date Fair Value, end of period	$ 81.81
Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accrued dividend shares	1,558
Weighted Average Grant Date Fair Value, Accrued dividend shares	$ 78.45
Electro Scientific Industries Inc [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Assumed shares from ESI Merger	736,133
Weighted Average Grant Date Fair Value, Assumed shares from ESI Merger	$ 84.10

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Stock-Based Compensation - Summary of Activity for SARs (Detail) - Stock Appreciation Rights (SARs) [Member]	3 Months Ended
	Mar. 31, 2019 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs/SARs - beginning of period | shares	177,538
Assumed SARs from ESI Merger, Outstanding SARs | shares	12,787
Exercised, Outstanding SARs | shares	(23,569)
Forfeited or expired, Outstanding SARs | shares	(184)
RSUs/SARs - end of period | shares	166,572
RSUs/SARs, Weighted Average Grant Date Fair Value, Beginning of period | $ / shares	$ 28.52
Assumed SARs from ESI Merger, Weighted Average Grant Date Fair Value | $ / shares	17.38
Exercised, Weighted Average Grant Date Fair Value | $ / shares	27.34
Forfeited or expired, Weighted Average Grant Date Fair Value | $ / shares	27.89
RSUs/SARs, Weighted Average Grant Date Fair Value, end of period | $ / shares	$ 27.86

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Stockholders' Equity - Additional Information (Detail) - USD ($)			3 Months Ended
	May 08, 2019	Jul. 25, 2011	Mar. 31, 2019	Mar. 31, 2018
Stockholders Equity [Line Items]
Common stock, value of shares authorized to repurchase		$ 200,000,000
Stock repurchase, shares		2,588,000	0	0
Value of shares repurchased		$ 127,000,000
Cash dividends per common share			$ 0.20	$ 0.18
Dividend payment to common shareholders			$ 10,843,000	$ 9,808,000
Subsequent Event [Member]
Stockholders Equity [Line Items]
Dividend declared date	Feb. 11, 2019
Cash dividend to be paid	$ 0.20
Dividend to be paid date	Jun. 07, 2019
Dividend declared, shareholders of record date	May 27, 2019

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Business Segment, Geographic Area, Product and Significant Customer Information - Additional Information (Detail)	3 Months Ended	12 Months Ended
	Mar. 31, 2019 Segment	Dec. 31, 2018 Product
Segment Reporting [Abstract]
Number of reportable segments | Segment	2
Number of product groups | Product		3

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Business Segment, Geographic Area, Product and Significant Customer Information - Net Revenues by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Net revenues	$ 463,561	$ 554,275
Vacuum & Analysis [Member]
Segment Reporting Information [Line Items]
Net revenues	234,355	348,344
Light & Motion [Member]
Segment Reporting Information [Line Items]
Net revenues	193,988	$ 205,931
Equipment & Solutions [Member]
Segment Reporting Information [Line Items]
Net revenues	$ 35,218

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Business Segment, Geographic Area, Product and Significant Customer Information - Reconciliation of Segment Gross Profit to Consolidated Net Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Gross profit	$ 198,118	$ 262,855
Research and development	38,933	34,857
Selling, general and administrative	82,455	82,949
Fees and expenses related to incremental term loan	5,847
Acquisition and integration costs	30,167
Restructuring	223	1,220
Customer contract obligation	1,700
Environmental costs		1,000
Amortization of intangible assets	15,727	11,190
Income from operations	23,066	131,639
Interest and other expense, net	7,730	4,897
Income before income taxes	15,336	126,742
Provision for income taxes	2,881	21,621
Net income	12,455	105,121
Vacuum & Analysis [Member]
Segment Reporting Information [Line Items]
Gross profit	98,139	158,500
Light & Motion [Member]
Segment Reporting Information [Line Items]
Gross profit	92,741	$ 104,355
Equipment & Solutions [Member]
Segment Reporting Information [Line Items]
Gross profit	$ 7,238

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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
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Capital expenditures	$ 14,529	$ 9,390
Depreciation and amortization	25,211	20,492
Vacuum & Analysis [Member]
Segment Reporting Information [Line Items]
Capital expenditures	7,488	6,197
Depreciation and amortization	4,045	5,129
Light & Motion [Member]
Segment Reporting Information [Line Items]
Capital expenditures	5,154	3,193
Depreciation and amortization	14,140	$ 15,363
Equipment & Solutions [Member]
Segment Reporting Information [Line Items]
Capital expenditures	1,887
Depreciation and amortization	$ 7,026

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Business Segment, Geographic Area, Product and Significant Customer Information - Segment Assets by Reportable Segment (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Accounts receivable	$ 335,990	$ 295,454
Inventory, net	475,633	384,689
Total assets	3,412,738	2,614,246
Vacuum & Analysis [Member]
Segment Reporting Information [Line Items]
Accounts receivable	160,040	171,604
Inventory, net	225,431	222,965
Total assets	385,471	394,569
Light & Motion [Member]
Segment Reporting Information [Line Items]
Accounts receivable	139,592	140,658
Inventory, net	164,603	161,658
Total assets	304,195	302,316
Equipment & Solutions [Member]
Segment Reporting Information [Line Items]
Accounts receivable	51,088
Inventory, net	85,690
Total assets	136,778
Operating Segments [Member]
Segment Reporting Information [Line Items]
Accounts receivable	335,990	295,454
Inventory, net	475,633	384,689
Total assets	811,623	680,143
Corporate, Eliminations & Other [Member]
Segment Reporting Information [Line Items]
Accounts receivable	(14,730)	(16,808)
Inventory, net	(91)	66
Total assets	$ (14,821)	$ (16,742)

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Business Segment, Geographic Area, Product and Significant Customer Information - Reconciliation of Segment Assets to Consolidated Total Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Segment Reporting, Asset Reconciling Item [Line Items]
Consolidated total assets	$ 3,412,738	$ 2,614,246
Other current assets	86,387	65,790
Property, plant and equipment, net	251,424	194,367
Other assets	48,562	38,682
Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Consolidated total assets	811,623	680,143
Segment Reconciling Items [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents and investments	472,692	728,461
Other current assets	86,387	65,790
Property, plant and equipment, net	251,424	194,367
Right-of-use asset	65,628
Goodwill and intangible assets, net	1,676,422	906,803
Other assets	$ 48,562	$ 38,682

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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
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 463,561	$ 554,275
Long-lived assets	286,253		$ 224,053
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	224,347	276,720
Long-lived assets	198,747		146,687
South Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	35,802	54,011
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	42,102	58,274
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	59,983	63,886
Long-lived assets	29,983		26,794
Asia (Excluding Korea and Japan) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	101,327	$ 101,384
Long-lived assets	$ 57,523		$ 50,572

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Business Segment, Geographic Area, Product and Significant Customer Information - Summary of Goodwill Associated with Reportable Segments (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Goodwill	$ 1,057,331	$ 586,996	$ 591,047
Vacuum & Analysis [Member]
Segment Reporting Information [Line Items]
Goodwill	196,937	197,126
Light & Motion [Member]
Segment Reporting Information [Line Items]
Goodwill	388,896	$ 389,870
Equipment & Solutions [Member]
Segment Reporting Information [Line Items]
Goodwill	$ 471,498

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Business Segment, Geographic Area, Product and Significant Customer Information - Worldwide Net Revenue for Each Group of Products (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue from External Customer [Line Items]
Net revenues	$ 463,561	$ 554,275
Advanced Manufacturing Components [Member]
Revenue from External Customer [Line Items]
Net revenues	371,345	496,677
Global Service [Member]
Revenue from External Customer [Line Items]
Net revenues	66,198	$ 57,598
Advanced Manufacturing Systems [Member]
Revenue from External Customer [Line Items]
Net revenues	$ 26,018

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Restructuring - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Reorganizations [Abstract]
Restructuring charges	$ 223	$ 1,220

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Restructuring - Schedule of Company's Restructuring Activity (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Restructuring and Related Activities [Abstract]
Beginning of period	$ 2,632	$ 3,244
Charged to expense	223	1,220
Payments and adjustments	(252)	(1,806)
End of period	$ 2,603	$ 2,658