Entegris (ENTG) 10-K 11 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Feb. 04, 2019	Jun. 30, 2018
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Trading Symbol	ENTG
Entity Registrant Name	ENTEGRIS INC
Entity Central Index Key	1,101,302
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		134,942,439
Entity Public Float			$ 4,768,870,172

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 482,062	$ 625,408
Trade accounts and notes receivable, net	222,055	183,434
Inventories, net	268,140	198,089
Deferred tax charges and refundable income taxes	17,393	18,012
Other current assets	39,688	32,665
Total current assets	1,029,338	1,057,608
Property, plant and equipment, net	419,529	359,523
Other assets:
Goodwill	550,202	359,688
Intangible assets, net	295,687	182,430
Deferred tax assets and other noncurrent tax assets	10,162	9,103
Other noncurrent assets	12,723	7,820
Total assets	2,317,641	1,976,172
Current liabilities:
Long-term debt, current maturities	4,000	100,000
Accounts payable	93,055	68,762
Accrued payroll and related benefits	78,288	64,860
Other accrued liabilities	62,732	34,514
Income taxes payable	31,593	22,835
Total current liabilities	269,668	290,971
Long-term debt, excluding current maturities	934,863	574,380
Pension benefit obligations and other liabilities	31,795	32,130
Deferred tax liabilities and other noncurrent tax liabilities	69,290	85,673
Commitments and contingent liabilities	0	0
Equity:
Preferred stock, par value $.01; 5,000,000 shares authorized; none issued and outstanding	0	0
Common stock, par value $.01; 400,000,000 shares authorized; issued and outstanding shares as of December 31, 2018: 136,179,381 and 135,976,981; issued and outstanding shares as of December 31, 2017: 141,282,539	1,362	1,413
Treasury stock, common, at cost: 202,400 and 0 shares held as of December 31, 2018 and December 31, 2017	(7,112)	0
Additional paid-in capital	837,658	867,699
Retained earnings	213,753	147,418
Accumulated other comprehensive loss	(33,636)	(23,512)
Total equity	1,012,025	993,018
Total liabilities and equity	$ 2,317,641	$ 1,976,172

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	400,000,000	400,000,000
Common stock, shares issued	136,179,381	141,282,539
Common stock, shares outstanding	135,976,981	141,282,539
Treasury Stock, Shares	202,400	0

Consolidated Statements Of Oper

Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net sales	$ 1,550,497	$ 1,342,532	$ 1,175,270
Cost of sales	830,666	733,547	666,579
Gross profit	719,831	608,985	508,691
Selling, general and administrative expenses	246,534	216,194	201,901
Engineering, research and development expenses	118,456	106,951	106,991
Amortization of intangible assets	62,152	44,023	44,263
Operating income	292,689	241,817	155,536
Interest expense	34,094	32,343	36,846
Interest income	(3,839)	(715)	(318)
Other expense (income), net	8,002	25,458	(991)
Income before income tax expense	254,432	184,731	119,999
Income tax expense	13,677	99,665	22,852
Net income	$ 240,755	$ 85,066	$ 97,147
Earnings Per Share:
Basic net income per common share	$ 1.71	$ 0.60	$ 0.69
Diluted net income per common share	$ 1.69	$ 0.59	$ 0.68
Weighted average shares outstanding
Basic	141,026	141,553	141,093
Diluted	142,610	143,518	142,050

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income	$ 240,755	$ 85,066	$ 97,147
Other comprehensive(loss) income, net of tax
Foreign currency translation adjustments	(10,183)	29,294	(7,352)
Reclassification of cumulative translation adjustment associated with liquidated and planned sale of subsidiaries	0	1,702	0
Reclassification adjustment associated with the sale of available-for-sale investments	0	0	(611)
Pension liability adjustments, net of income tax (benefit) expense of $(13), $(26), and $82 for year ended December 31, 2018, 2017, and 2016	59	(232)	462
Other comprehensive (loss) income	(10,124)	30,764	(7,501)
Comprehensive income	$ 230,631	$ 115,830	$ 89,646

Consolidated Statements Of Co_2

Consolidated Statements Of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pension liability adjustments, income tax (benefit) expense	$ (13)	$ (26)	$ 82

Consolidated Statements Of Equi

Consolidated Statements Of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common stock	Treasury Stock, Common	Additional paid-in capital	Retained earnings (deficit)	Foreign currency translation adjustments	Available-for-sale investments-Change in net unrealized gains	Defined benefit pension adjustments
Balance	$ 802,883	$ 1,407	$ 0	$ 848,667	$ (416)	$ (46,237)	$ 611	$ 1,149
Balance (in shares) at Dec. 31, 2015		140,716
Shares issued under stock plans (in shares)		1,123
Shares issued under stock plans	826	$ 11	0	815	0	0	0	0
Share-based compensation expense	13,436	$ 0	0	13,436	0	0	0	0
Repurchase and retirement of common stock (in shares)		(519)
Repurchase and retirement of common stock	(7,573)	$ (5)	0	(3,140)	(4,428)	0	0	0
Pension liability adjustment	462	0	0	0	0	0	0	462
Reclassification adjustment associated with the sale of available-for-sale investments	(611)	0	0	0	0	0	(611)	0
Foreign currency translation	(7,352)	0	0	0	0	(7,352)	0	0
Reclassification of cumulative translation adjustment associated with liquidated and planned sale of subsidiaries	0
Net income	97,147	$ 0	0	0	97,147	0	0	0
Balance (in shares) at Dec. 31, 2016		141,320
Balance	899,218	$ 1,413	0	859,778	92,303	(53,589)	0	687
Shares issued under stock plans (in shares)		1,040
Shares issued under stock plans	(321)	$ 11	0	(332)	0	0	0	0
Share-based compensation expense	15,306	$ 0	0	15,306	0	0	0	0
Repurchase and retirement of common stock (in shares)		(1,077)
Repurchase and retirement of common stock	(28,000)	$ (11)	0	(6,565)	(21,424)
Dividends, Common Stock, Cash	(9,896)	0	0	0	(9,896)	0	0	0
Pension liability adjustment	(232)	0	0	0	0	0	0	(232)
Reclassification adjustment associated with the sale of available-for-sale investments	0
Foreign currency translation	29,294	0	0	0	0	29,294	0	0
Reclassification of cumulative translation adjustment associated with liquidated and planned sale of subsidiaries	1,702	0	0	0	0	1,702	0	0
Net income	85,066	$ 0	0	0	85,066	0	0	0
Balance (in shares) at Dec. 31, 2017		141,283
Balance	993,018	$ 1,413	0	867,699	147,418	(22,593)	0	919
Cumulative Effect of New Accounting Principle in Period of Adoption	881	$ 0	0	(488)	1,369	0	0	0
Shares issued under stock plans (in shares)		1,120
Shares issued under stock plans	(9,109)	$ 11	0	(9,120)	0	0	0	0
Share-based compensation expense	17,112	$ 0	$ 0	17,112	0	0	0	0
Repurchase and retirement of common stock (in shares)		(6,224)	(202)
Repurchase and retirement of common stock	(179,315)	$ (62)	$ (7,112)	(38,066)	(134,075)
Dividends, Common Stock, Cash	(39,722)	0	0	(33)	(39,755)	0	0	0
Pension liability adjustment	59	0	0	0	0	0	0	59
Reclassification adjustment associated with the sale of available-for-sale investments	0
Foreign currency translation	(10,183)	0	0	0	0	(10,183)	0	0
Reclassification of cumulative translation adjustment associated with liquidated and planned sale of subsidiaries	0
Net income	240,755	$ 0	$ 0	0	240,755	0	0	0
Balance (in shares) at Dec. 31, 2018		136,179	202
Balance	1,012,025	$ 1,362	$ 7,112	837,658	213,753	(32,776)	0	860
Cumulative Effect of New Accounting Principle in Period of Adoption	$ (590)	$ 0	$ 0	$ 0	$ (590)	$ 0	$ 0	$ 0

Consolidated Statements Of Eq_2

Consolidated Statements Of Equity Consolidated Statement of Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]
Common Stock, Dividends, Per Share, Declared	$ 0.28	$ 0.07	$ 0

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating activities:
Net income	$ 240,755	$ 85,066	$ 97,147
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	65,116	58,208	55,623
Amortization	62,152	44,023	44,263
Share-based compensation expense	17,112	15,306	13,436
Provision for deferred income taxes	(11,876)	1,628	(16,284)
Charge for excess and obsolete inventory	4,496	9,405	9,302
Amortization of debt issuance costs	1,834	2,864	3,947
Loss on extinguishment of debt	2,429	20,687	0
Other	9,948	16,026	9,744
Changes in operating assets and liabilities, net of effects of acquisitions:
Trade accounts receivable and notes receivable	(17,473)	(15,401)	(25,298)
Inventories	(38,100)	(20,214)	(19,871)
Accounts payable and other accrued liabilities	19,950	15,975	31,294
Other current assets	(13,677)	(3,330)	185
Income taxes payable and refundable income taxes	(30,381)	64,516	3,408
Other	291	(1,386)	659
Net cash provided by operating activities	312,576	293,373	207,555
Investing activities:
Acquisition of property and equipment	(110,153)	(93,597)	(65,260)
Acquisition of business, net of cash acquired	(380,694)	(20,000)	0
Proceeds from sale or maturities of short-term investments	0	0	1,726
Other	4,903	1,142	(3,152)
Net cash used in investing activities	(485,944)	(112,455)	(66,686)
Financing activities:
Proceeds from long-term debt	402,000	550,000	0
Payments of long-term debt	(135,850)	(460,000)	(75,000)
Payments for debt issuance costs	(7,400)	(7,333)	0
Payments for debt extinguishment costs	0	(16,200)	0
Payments for dividends	(39,591)	(9,896)	0
Issuance of common stock from employee stock plans	5,577	5,566	4,844
Taxes paid related to net share settlement of equity awards	(14,686)	(5,887)	(4,018)
Repurchase and retirement of common stock	(173,781)	(28,000)	(7,573)
Other	(1,858)	(999)	0
Net cash provided by (used in) financing activities	34,411	27,251	(81,747)
Effect of exchange rate changes on cash and cash equivalents	(4,389)	10,850	(2,558)
(Decrease) increase in cash and cash equivalents	(143,346)	219,019	56,564
Cash and cash equivalents at beginning of year	625,408	406,389	349,825
Cash and cash equivalents at end of year	482,062	625,408	406,389
Supplemental Cash Flow Information
Equipment purchases in accounts payable	17,624	8,608	5,104
Repurchase and retirement of common stock to be settled	5,534	0	0
Capital lease obligations incurred	0	4,768	0
Dividends Payable	131
Schedule of interest and income taxes paid:
Interest paid	26,248	30,392	32,085
Income taxes, net of refunds received	$ 54,415	$ 33,330	$ 35,722

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of Operations Entegris, Inc. (Entegris or the Company) is a leading global developer, manufacturer and supplier of microcontamination control products, specialty chemicals and advanced materials handling solutions for manufacturing processes in the semiconductor and other high-technology industries. Principles of Consolidation The consolidated financial statements include the accounts of the Company and its majority-owned subsidiaries. Intercompany profits, transactions and balances have been eliminated in consolidation. Use of Estimates and Basis of Presentation The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States requires management to make judgments, estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. On an ongoing basis, Entegris evaluates its estimates, including those related to receivables, inventories, property, plant and equipment, intangible assets, accrued liabilities, income taxes and share-based compensation, among others. Actual results could differ from those estimates. Cash and Cash Equivalents Cash and cash equivalents include cash on hand and highly liquid debt securities with original maturities of three months or less, which are valued at cost and approximates fair value. Allowance for Doubtful Accounts An allowance for uncollectible trade receivables is estimated based on a combination of write-off history, aging analysis and any specific, known troubled accounts. The Company maintains an allowance for doubtful accounts that management believes is adequate to cover expected losses on trade receivables. Inventories Inventories are stated at the lower of cost and net realizable value. Cost is determined by the first-in, first-out (FIFO) method. Property, Plant, and Equipment Property, plant and equipment are carried at cost and are depreciated on the straight-line method over the estimated useful lives of the assets. When assets are retired or disposed of, the cost and related accumulated depreciation are removed from the accounts, and gains or losses are recognized in the same period. Maintenance and repairs are expensed as incurred, while significant additions and improvements are capitalized. Long-lived assets, including property, plant and equipment, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or group of assets may not be recoverable based on estimated future undiscounted cash flows. The amount of impairment, if any, is measured as the difference between the net book value and the estimated fair value of the asset(s). Fair Value of Financial Instruments The carrying value of cash equivalents, accounts receivable, accounts payable, accrued payroll and related benefits, and other accrued liabilities approximates fair value due to the short maturity of those instruments. The fair value of long-term debt, including current maturities, based upon models utilizing market observable (Level 2) inputs and credit risk, was $929 million at December 31, 2018 compared to the carrying amount of long-term debt, including current maturities, of $939 million . Goodwill and Intangible Assets Goodwill represents the excess of acquisition costs over the fair value of the net assets of businesses acquired. Goodwill is not subject to amortization, but is tested for impairment annually at August 31, the Company’s annual testing date, and whenever events or changes in circumstances indicate that impairment may have occurred. The Company compares the carrying value of its reporting units, including goodwill, to their fair value. For reporting units in which the assessment indicates that it is more likely than not that the fair value is more than its carrying value, goodwill is not considered impaired. If the carrying value of the reporting unit exceeds fair value, goodwill is considered impaired. Based on its annual analysis, the Company determined there was no indication of impairment of goodwill and the estimated fair value of each reporting unit substantially exceeded its carrying value. Amortizable intangible assets include, among other items, patented, unpatented and other developed technology and customer-based intangibles, and are amortized using the straight-line method over their respective estimated useful lives. The Company reviews intangible assets, along with other long-lived assets - primarily property, plant and equipment - for impairment if changes in circumstances or the occurrence of events suggest the remaining value may not be recoverable. Derivative Financial Instruments The Company records derivatives as assets or liabilities on the balance sheet and measures such instruments at fair value. Changes in fair value of derivatives are recorded each period in the Company’s consolidated statements of operations. The Company periodically enters into forward foreign currency contracts to reduce exposures relating to rate changes in certain foreign currencies. Certain exposures to credit losses related to counterparty nonperformance exist. However, the Company does not anticipate nonperformance by the counterparties since they are large, well-established financial institutions. None of these derivatives is accounted for as a hedge transaction. Accordingly, changes in the fair value of forward foreign currency contracts are recorded as other expense (income), net, in the Company’s consolidated statements of operations. The fair values of the Company’s derivative financial instruments are based on prices quoted by financial institutions for these instruments. Foreign Currency Translation Assets and liabilities of certain foreign subsidiaries are translated from foreign currencies into U.S. dollars at period-end exchange rates, and the resulting gains and losses arising from translation of net assets located outside the U.S. are recorded as a cumulative translation adjustment, a component of accumulated other comprehensive loss in the consolidated balance sheets. Income statement amounts are translated at the weighted average exchange rates for the year. Translation adjustments are not adjusted for income taxes, as substantially all translation adjustments relate to permanent investments in non-U.S. subsidiaries. Gains and losses resulting from foreign currency transactions are included in other expense (income), net, in the Company’s consolidated statements of operations. Revenue Recognition Revenue is measured based on consideration specified in a contract with a customer, and excludes any sales incentives and amounts collected on behalf of third parties. The Company recognizes revenue when it satisfies a performance obligation by transferring control over a product or service to a customer. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, that are collected by the Company from a customer, are excluded from revenue. Shipping and handling costs associated with outbound freight after control over a product has transferred to a customer are accounted for as a fulfillment cost and are included in cost of goods sold. Shipping and Handling Costs Shipping and handling costs incurred are recorded in cost of sales in the Company’s consolidated statements of operations. Engineering, Research and Development Expenses Engineering, research and development costs are expensed as incurred. Share-based Compensation The Company measures the cost of employee services received in exchange for the award of equity instruments based on the fair value of the award at the date of grant. Compensation expense is recognized using the straight-line attribution method to recognize share-based compensation over the service period of the award, with adjustments recorded for forfeitures as they occur. Income Taxes The Company accounts for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Under this method, deferred tax assets and liabilities are determined on the basis of the differences between the financial statements and tax basis of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income tax expense in the period that includes the enactment date. The Company recognizes deferred tax assets to the extent that it believes these assets are more likely than not to be realized. A valuation allowance is recorded to reduce deferred tax assets when it is more likely than not that the Company would not be able to realize all or part of its deferred tax assets. In making such a determination, the Company considers all available positive and negative evidence, including future reversals of existing temporary differences, projected future taxable income, tax-planning strategies, and results of recent operations. If the Company determines that it would be able to realize its deferred tax assets in the future in excess of their net recorded amount, the Company would make an adjustment to the deferred tax asset valuation allowance, which would reduce the provision for income taxes. The Company’s policy for recording interest and penalties associated with audits and unrecognized tax benefits is to record such items as a component of income before taxes. Penalties and interest to be paid or received are recorded in other expense (income), net, in the statement of operations. Comprehensive Income (Loss) Comprehensive income (loss) represents the change in equity resulting from items other than shareholder investments and distributions. The Company’s foreign currency translation adjustments, unrealized gains and losses on available-for-sale investments, and minimum pension liability adjustments are included in accumulated other comprehensive loss. Comprehensive income (loss) and the components of accumulated other comprehensive loss are presented in the accompanying consolidated statements of comprehensive income (loss) and consolidated statements of equity. Recent Accounting Pronouncements Adopted in 2018 In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (AS) No. 2014-09, Revenue from Contracts with Customers. ASU No. 2014-09 supersedes previous revenue recognition requirements and requires entities to recognize revenue when control of the promised goods or services is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The Company adopted the provisions of ASU No. 2014-09 as of January 1, 2018 using the modified retrospective transition method. See note 2 to the Consolidated financial statements for further details. Recent Accounting Pronouncements Yet to be Adopted In February 2016, the FASB established Topic 842, Leases , by issuing Accounting Standards Update (ASU) No. 2016-02, which requires lessees to recognize leases on-balance sheet and disclose key information about leasing arrangements. Topic 842 was subsequently amended by ASU No. 2018-01, Land Easement Practical Expedient for Transition to Topic 842; ASU No. 2018-10, Codification Improvements to Topic 842, Leases; and ASU No. 2018-11, Targeted Improvements. The new standard establishes a right-of-use model (ROU) that requires a lessee to recognize a ROU asset and lease liability on the balance sheet for all leases with a term longer than 12 months. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement. The new standard is effective for the Company on January 1, 2019, with early adoption permitted. A modified retrospective transition approach is required, applying the new standard to all leases existing at the date of initial application. We expect to adopt the new standard on January 1, 2019 and use the effective date as the date of initial application. Consequently, the Company will not recast its comparative period financial statements or provide the disclosures required by the new standard for the comparative periods. The new standard provides a number of optional practical expedients in transition. The Company expects to elect the ‘package of practical expedients’, which permits the Company not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. The Company also expects to elect the practical expedient pertaining to land easements, which allows the Company not to evaluate all existing land easements in connection with the adoption of the new lease requirements to assess whether they meet the definition of a lease. The Company does not expect to elect the use-of-hindsight practical expedient and therefore will not reassess the lease terms for purposes of calculation of the lease liabilities and right-of-use assets at the initial adoption. The Company expects that this standard will have a material effect on the Company’s consolidated balance sheets. On adoption, the Company currently expects to recognize additional operating liabilities and right-of-use assets of approximately $40 to $60 million. The Company does not expect this standard to have a material impact on our annual consolidated statement of operations and/or cash flows. While the Company continues to assess all of the effects of adoption, the Company currently believes the most significant effects relate to the recognition of new right-of-use assets and lease liabilities on the balance sheet for real estate operating leases and the Company expects to provide significant new disclosures about the leasing activities. The new standard also provides practical expedients for an entity’s ongoing accounting. The Company currently expects to elect the short-term lease recognition exemption for all leases that qualify. This means, for those leases that qualify, the Company will not recognize right-of-use assets or lease liabilities, and this includes not recognizing right-of-use assets or lease liabilities for existing short-term leases of those assets in transition. The Company also currently expects to elect the practical expedient to not separate lease and non-lease components for all leases other than leases of real estate, and this includes not separating lease and non-lease components for all leases other than leases of real estate in transition.

Revenues Revenues

Revenues Revenues	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer	REVENUES Adoption of ASC ASU No. 2014-09, Revenue from Contracts with Customers On January 1, 2018, the Company adopted ASU No. 2014-09 using the modified retrospective method applied to those contracts which were not completed as of January 1, 2018. Results for reporting periods beginning after January 1, 2018 are presented under the provisions of ASU No. 2014-09, while prior period amounts are not adjusted and continue to be reported in accordance with previous accounting guidance. The Company adopted ASU No. 2014-09 with a date of initial application of January 1, 2018. As a result, the Company changed its accounting policy for revenue recognition for two items as detailed below. The first change concerns transactions where the Company offers customers incentives in the form of free products. The new revenue standard requires that a portion of the transaction price be allocated to the free product and deferred until the product has been delivered. The Company previously accrued for undelivered free product as a charge to cost of goods sold. The second change concerns revenue recognition involving certain shipping terms that included freight and export costs. Under the new revenue standard, the Company recognizes revenue at the point at which products are delivered to a particular port or loaded onto a vessel and control has transferred, whereas prior to the date of initial application of ASU No. 2014-09, revenue recognition was previously deferred for those sales until they reached their destination. The Company adopted ASU No. 2014-09 using the modified retrospective method, recognizing the cumulative effect of application as an adjustment to the opening balance of equity at January 1, 2018. Therefore, prior year information has not been adjusted and continues to be reported under previous applicable guidance. The details of the impact of the changes made to the Company’s balance sheet date as of January 1, 2018 are reflected in the following table. ( In thousands ) Increase (decrease) Trade accounts and note receivable $ 765 Inventory (223 ) Other accrued liabilities 1,276 Deferred tax liabilities and other noncurrent tax liabilities (144 ) Retained earnings (590 ) Based on an analysis of the financial statement line items affected in 2018 in the application of ASU No. 2014-09 as compared with previous reporting, the Company has determined that the quantitative changes to each financial statement line item are immaterial. As a result, for the year ended December 31, 2018, the Company is not disclosing the quantitative amount by which each financial statement line item is affected in the current reporting by the application of Topic 606 as compared with the guidance that was in effect before the change. As part of its adoption of ASU No. 2014-09 in the first quarter of 2018, the Company elected to use the allowed practical expedient, pursuant to which it has excluded disclosures of transaction prices allocated to remaining performance obligations and when it expects to recognize such revenue for all periods prior to the date of initial application of ASU No. 2014-09. Revenue Recognition Revenue is measured based on consideration specified in a contract with a customer, and excludes any sales incentives and amounts collected on behalf of third parties. The Company recognizes revenue when it satisfies a performance obligation by transferring control over a product or service to a customer. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, that are collected by the Company from a customer, are excluded from revenue. Shipping and handling costs associated with outbound freight after control over a product has transferred to a customer are accounted for as a fulfillment cost and are included in cost of goods sold. The Company recognizes the incremental costs of obtaining contracts as an expense when incurred if the amortization period of the assets that the Company otherwise would have recognized is one year or less. When the Company receives consideration, or such consideration is unconditionally due, from a customer prior to transferring goods or services to the customer under the terms of a sales contract, the Company records deferred revenue, which represents a contract liability. Such deferred revenue typically results from advance payments received on sales of the Company’s products. The deferred revenue balance at quarter end is deemed immaterial and, accordingly, the Company does not make the required disclosures. The Company is using the practical expedient that allows it to omit disclosures of remaining performance obligations that have original expected durations of one year or less. Nature of goods and services The following is a description of principal activities from which the Company generates its revenues. The Company has three reportable segments. For more detailed information about reportable segments, see note 9 to the consolidated financial statements. For each of the three reportable segments, the recognition of revenue regarding the nature of goods and services provided by the segments are similar and described below. The Company recognizes revenue product sales at a point in time following the transfer of control of such products to the customer, which generally occurs upon shipment, or delivery depending on the terms of the underlying contracts. For product sales contracts that contain multiple performance obligations, the Company allocates the transaction price to each performance obligation identified in the contract based on relative standalone selling prices, or estimates of such prices, and recognizes the related revenue as control of each individual product is transferred to the customer, in satisfaction of the corresponding performance obligations. The Company generally recognizes revenue for sales of services over time as the Company has satisfied the performance obligation. The payment terms and revenue recognized is based on time and materials. The Company also enters into arrangements to license its intellectual property. These arrangements typically permit the customer to use a specialized manufacturing process and in return the Company receives a royalty fee. If applicable, the Company recognizes revenue when the subsequent sale or usage occurs. If not applicable, the Company recognizes revenue at a point in time when transfer of control of the license has occurred. The Company offers certain customers cash discounts and volume rebates as sales incentives. The discounts and volume rebates are recorded as a reduction in sales at the time revenue is recognized in an amount estimated based on historical experience and contractual obligations. The Company periodically reviews the assumptions underlying its estimates of discounts and volume rebates and adjusts its revenues accordingly. In addition, the Company offers free product rebates to certain customers. The Company utilizes an adjusted market approach to estimate the stand-alone selling price of the loyalty program and allocates a portion of the consideration received to the free product offering. The free product offering is redeemable upon future purchases of the Company’s products. The amount associated with free product rebates is deferred in the balance sheet and is recognized as revenue when the free product is redeemed or when the likelihood of redemption is remote. The Company deems the amount immaterial for disclosure. The Company applies the practical expedient in ASU No. 2014-09 and does not disclose information about remaining performance obligations that have original expected durations of one year or less. The Company provides for the estimated costs of fulfilling our obligations under product warranties at the time the related revenue is recognized. The Company estimates the costs based on historical failure rates, projected repair costs, and knowledge of specific product failures (if any). The specific warranty terms and conditions vary depending upon the product sold and the country in which we do business, but generally include parts and labor over a period generally ranging from 90 days to one year. The Company regularly reevaluates its estimates to assess the adequacy of the recorded warranty liabilities and adjust the amounts as necessary. The Company’s contracts are generally short-term in nature. Most contracts do not exceed twelve months. Payment terms vary by the type and location of the Company’s customers and the products or services offered. The term between invoicing and when payment is due is not significant. For certain products or services and customer types, the Company requires payment before the products or services are delivered to the customer. Those customers that prepay are represented by the contract liabilities below until the performance obligations are satisfied. The following table provides information about contract liabilities from contracts with customers. The contract liabilities are included in other accrued liabilities balance in the consolidated balance sheet. (In thousands) December 31, 2018 December 31, 2017 Contract liabilities - current $ 15,364 $ 3,210 Significant changes in the contract liabilities balances during the period are as follows: (In thousands) 2018 Revenue recognized that was included in the contract liability balance at the beginning of the period $ (3,210 ) Increases due to cash received, excluding amounts recognized as revenue during the period 5,918 Business combination 9,446

Acquisition (Notes)

Acquisition (Notes)	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Business Combination Disclosure	ACQUISITION SAES Pure Gas On June 25, 2018 , the Company acquired the SAES Pure Gas business (SPG), from SAES Getters S.p.A. for approximately $352.7 million in cash, or $341.5 million net of cash acquired, subject to revision for customary working capital adjustments, funded from the Company’s existing cash on hand. The acquisition was accounted for under the acquisition method of accounting and the results of operations of SPG are included in the Company’s consolidated financial statements as of and since June 25, 2018 . Direct costs of $4.8 million associated with the acquisition of SPG, consisting mainly of professional and consulting fees, were expensed as incurred for the year ended December 31, 2018. These costs are included in selling, general and administrative expense in the Company’s consolidated statements of operations. Since the date of acquisition through December 31, 2018, SPG reported net sales and net loss of $62.2 million and $2.6 million , respectively, which are included in the Company’s consolidated income statement. SPG, based in San Luis Obispo, California, is a leading provider of high-capacity gas purification systems used in semiconductor manufacturing and adjacent markets, and reports into the Microcontamination Control division of the Company. This acquisition expands the gas purification solutions portfolio in our Microcontamination Control Division with high-capacity products suited for bulk chemical purification applications. The following table summarizes the provisional allocation of the purchase price to the fair values assigned to the assets acquired and liabilities assumed at the date of the SPG acquisition: (In thousands): As of June 30, 2018 As of December 31, 2018 Trade accounts and notes receivable, net $ 15,805 $ 19,173 Inventories, net 46,073 42,758 Other current assets 424 1,322 Property, plant and equipment, net 7,345 6,653 Identifiable intangible assets 178,220 150,430 Deferred tax asset — 831 Other noncurrent assets 398 12 Current liabilities (26,196 ) (26,473 ) Deferred tax liabilities (42,110 ) (35,533 ) Other noncurrent liabilities (1,006 ) (1,412 ) Net assets acquired 178,953 157,761 Goodwill 162,251 183,729 Total purchase price, net of cash acquired $ 341,204 $ 341,490 The fair value of acquired inventories of $42.8 million is valued at the estimated selling price less the cost of disposal and reasonable profit for the selling effort. The fair value write-up of acquired work-in-process and finished goods inventory was $8.9 million , the amount of which will be amortized over the expected turn of the acquired inventory. Accordingly, a $6.9 million incremental cost of sales charge associated with the fair value write-up of inventory acquired in the acquisition of SPG was recorded for the year ended December 31, 2018. The fair value of acquired property, plant and equipment of $6.7 million is valued at its value-in-use. The Company recognized the following finite-lived intangible assets as part of the acquisition of SPG: (In thousands) Amount Weighted average life in years Developed technology $ 20,070 8.0 Trademarks and trade names 6,670 12.0 Customer relationships 107,790 12.0 Other 15,900 0.9 $ 150,430 10.0 The acquired identifiable intangible assets are being amortized on a straight-line basis. The fair value of acquired identifiable intangible assets 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, discount rate 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. The fair value measurements of the assets acquired and liabilities assumed were based on valuations involving significant unobservable inputs, or Level 3 in the fair value hierarchy. The purchase price of SPG exceeded the net of the acquisition-date amounts of the identifiable assets acquired and the liabilities assumed by $183.7 million . Cash flows used to determine the purchase price included strategic and synergistic benefits (investment value) specific to the Company, which resulted in a purchase price in excess of the fair value of identifiable net assets. The purchase price also included the fair values of other assets that were not identifiable, not separately recognizable under accounting rules (e.g., assembled workforce) or of immaterial value in addition to a going-concern element that represents the Company’s ability to earn a higher rate of return on the group of assets than would be expected on the separate assets as determined during the valuation process. This additional investment value resulted in goodwill. No amount of goodwill is expected to be deductible for income tax purposes. The final valuation of assets acquired and liabilities assumed is expected to be completed as soon as possible, but no later than one year from the acquisition date. Given the size and complexity of the acquisition, the valuation of certain assets and liabilities, is still being completed, and is subject to final review. The Company's valuation of SPG's tax accounts is provisional pending the completion of and the Company's final review of SPG's tax accounts . To the extent that the Company's estimates require adjustment, the Company will modify the values. Pro Forma Results (Unaudited) The following unaudited pro forma financial information presents the combined results of operations of the Company as if the acquisition of SPG had occurred as of the beginning of the years presented. The unaudited pro forma financial information is not necessarily indicative of what the Company’s 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. (In thousands, except per share data) (Unaudited) Year ended December 31, 2018 Year ended December 31, 2017 Net sales $ 1,604,194 $ 1,437,357 Net income 273,625 67,009 Per share amounts: Net income per common share - basic $ 1.94 $ 0.47 Net income per common share - diluted $ 1.92 $ 0.47 The unaudited pro forma financial information above gives effect to the following: a. The elimination of transactions between Entegris and SPG, which upon completion of the acquisition would be considered intercompany. This reflects the elimination of intercompany sales and associated intercompany accounts. b. Incremental amortization and depreciation expense related to the estimated fair value of identifiable intangible assets and property, plant and equipment from the purchase price allocation. The unaudited pro forma financial information above for the year ended December 31, 2018 excludes the incremental charge of $8.9 million reported in cost of sales for the sale of acquired inventory that was written-up to fair value, respectively. The pro forma data does not include data for Particle Sizing Systems, LLC and Flex Concepts, Inc. for the period prior to their acquisitions due to the immaterial impact on the pro forma financial information for the year ended December 31, 2018. Particle Sizing Systems On January 22, 2018 , the Company acquired Particle Sizing Systems, LLC (PSS), which provides particle sizing instrumentation for liquid applications to the semiconductor and life science industries. The acquired assets and assumed liabilities became part of the Company’s Advanced Materials Handling (AMH) segment. The transaction was accounted for under the acquisition method of accounting and the results of operations of PSS are included in the Company’s consolidated financial statements since January 22, 2018. The acquisition does not constitute a material business combination. The purchase price for PSS was cash consideration of $37.3 million , funded from the Company’s existing cash on hand. Costs associated with the acquisition of the product line were not significant and were expensed as incurred. The purchase price of PSS exceeds the net of the acquisition-date amounts of the identifiable assets acquired and the liabilities assumed by $8.8 million . Cash flows used to determine the purchase price included strategic and synergistic benefits (investment value) specific to the Company, which resulted in a purchase price in excess of the fair value of identifiable net assets. This additional investment value resulted in goodwill, which is expected to be deductible for income tax purposes. The following table summarizes the final allocation of the purchase price to the fair values assigned to the assets acquired and liabilities assumed at the date of acquisition: (In thousands): As of March 31, 2018 As of December 31, 2018 Trade accounts and notes receivable, net $ 3,616 $ 3,898 Inventories, net 1,889 1,827 Other current assets 14 23 Property, plant and equipment, net — 103 Identifiable intangible assets 20,000 25,600 Other noncurrent assets 21 3 Accounts payables (438 ) (294 ) Other accrued liabilities (2,799 ) (2,667 ) Net assets acquired 22,303 28,493 Goodwill 15,353 8,804 Total purchase price $ 37,656 $ 37,297 As of December 31, 2018, the Company has finalized its fair value determinations of the assets acquired and liabilities assumed. The valuation of the assets acquired and liabilities assumed was 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. Intangible assets, consisting mostly of technology-related intellectual property, generally will be amortized on a straight-line basis over an expected useful life currently estimated at approximately 9.4 years. In performing the valuation of intangible assets, the Company used independent appraisals, discounted cash flows and other factors, as the best evidence of fair value. The key underlying assumptions of the discounted cash flows were projected revenues, gross margin expectations and operating cost estimates. There are inherent uncertainties and management judgment required in these determinations. No assurance can be given that the underlying assumptions will occur as projected. The fair value measurement of the assets acquired and liabilities assumed were based on valuation involving significant unobservable inputs, or Level 3 in the fair value hierarchy. Flex Concepts On June 26, 2018 , the Company acquired Flex Concepts, Inc. (Flex), a technology company focused on single-use fluid handling bags, tubing manifolds and hardware for the life sciences industry. The purchase price of Flex was for cash consideration of $1.9 million . The transaction was accounted for under the acquisition method of accounting and the results of operations of Flex are included in the Company’s consolidated financial statements since June 26, 2018. The acquisition does not constitute a material business combination. During the year ended December 31, 2018, the Company finalized its fair value determinations of the assets acquired and liabilities assumed. The valuation of the assets acquired and liabilities assumed was 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. Water and Chemical Filtration Product Line On April 24, 2017 , the Company acquired the microelectronic water and chemical filtration product line of W.L. Gore & Associates, Inc. (Gore). The acquired assets became part of the Company’s Microcontamination Control (MC) segment. The transaction was accounted for under the acquisition method of accounting and the results of operations of the product line are included in the Company’s consolidated financial statements as of and since April 24, 2017. The acquisition of the product line’s assets and liabilities does not constitute a material business combination. The purchase price for the product line was cash consideration of $20.0 million , funded from the Company’s existing cash on hand. Costs associated with the acquisition of the product line were not significant and were expensed as incurred. The purchase price of the product line exceeds the net of the acquisition-date amounts of the identifiable assets acquired and the liabilities assumed by $8.0 million . Cash flows used to determine the purchase price included strategic and synergistic benefits (investment value) specific to the Company, which resulted in a purchase price in excess of the fair value of identifiable net assets. This additional investment value resulted in goodwill, which was deductible for income tax purposes. The following table summarizes the final allocation of the purchase price to the fair values assigned to the assets and liabilities assumed at the date of acquisition: (In thousands) Amount Other current assets $ 726 Property, plant and equipment, net 2,447 Identifiable intangible assets 8,820 Net assets acquired 11,993 Goodwill 8,007 Total purchase price $ 20,000 Intangible assets, consisting mostly of technology-related intellectual property, generally will be amortized on a straight-line basis over an estimated useful life of approximately 7 years. As part of the accounting for this transaction, the Company allocated the purchase price of the acquired product line based on the fair value of all the assets acquired. The valuation of the assets acquired was 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. In performing these valuations, the Company used independent appraisals, discounted cash flows and other factors, as the best evidence of fair value. The key underlying assumptions of the discounted cash flows were projected revenues, gross margin expectations and operating cost estimates. There are inherent uncertainties and management judgment required in these determinations. No assurance can be given that the underlying assumptions will occur as projected. The fair value measurement of the assets acquired and liabilities assumed was based on valuation involving significant unobservable inputs, or Level 3 in the fair value hierarchy.

Trade Accounts and Notes Receiv

Trade Accounts and Notes Receivable	12 Months Ended
	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Trade Accounts and Notes Receivable	TRADE ACCOUNTS AND NOTES RECEIVABLE Trade accounts and notes receivable from customers at December 31, 2018 and 2017 consist of the following: (In thousands) 2018 2017 Accounts receivable $ 218,098 $ 179,194 Notes receivable 4,850 5,100 Total trade accounts and notes receivable 222,948 184,294 Less allowance for doubtful accounts 893 860 Trade accounts and notes receivable, net $ 222,055 $ 183,434

Inventories

Inventories	12 Months Ended
	Dec. 31, 2018
Inventory Disclosure [Abstract]
Inventories	INVENTORIES Inventories at December 31, 2018 and 2017 consist of the following: (In thousands) 2018 2017 Raw materials $ 100,770 $ 58,226 Work-in-process 31,412 16,193 Finished goods (a) 135,958 123,670 Inventories, net $ 268,140 $ 198,089 (a) Includes consignment inventories held by customers for $12.5 million and $15.6 million at December 31, 2018 and 2017 , respectively.

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	PROPERTY, PLANT AND EQUIPMENT Property, plant, and equipment at December 31, 2018 and 2017 consists of the following: (In thousands) 2018 2017 Estimated useful lives in years Land $ 21,913 $ 16,795 Buildings and improvements 185,175 174,615 5-35 Manufacturing equipment 298,529 274,723 5-10 Canisters and cylinders 90,790 77,325 3-12 Molds 72,089 80,198 3-5 Office furniture and equipment 142,818 121,345 3-8 Construction in progress 69,437 42,288 Total property, plant and equipment 880,751 787,289 Less accumulated depreciation 461,222 427,766 Property, plant and equipment, net $ 419,529 $ 359,523 The table below sets forth the depreciation expense for the years ended December 31, 2018 , 2017 and 2016 : (In thousands) 2018 2017 2016 Depreciation expense $ 65,116 $ 58,208 $ 55,623

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	GOODWILL AND INTANGIBLE ASSETS Goodwill activity for each of the Company’s reportable segments that carry goodwill, Specialty Chemicals and Engineered Materials (SCEM ), Microcontamination Control (MC) and Advanced Materials Handling (AMH), for the years ended December 31, 2018 and 2017 is shown below: (In thousands) SCEM MC AMH Total December 31, 2016 $ 297,858 $ — $ 47,411 $ 345,269 Purchase accounting adjustments — 8,007 — 8,007 Other, including foreign currency translation 6,412 — — 6,412 December 31, 2017 304,270 8,007 47,411 359,688 Addition due to acquisitions — 183,729 9,660 193,389 Other, including foreign currency translation (2,847 ) (28 ) — (2,875 ) December 31, 2018 $ 301,423 $ 191,708 $ 57,071 $ 550,202 As of December 31, 2018 , goodwill amounted to approximately $550.2 million , an increase of $190.5 million from the balance at December 31, 2017 . The increase in goodwill in 2018 reflects the acquisition of SPG, PSS and Flex described in note 3 offset by the decrease to foreign currency translation. The increase in goodwill in 2017 reflects the acquisition of the microelectronic water and chemical filtration product line of Gore described in note 3. In addition, goodwill increased due to foreign currency translation. Identifiable intangible assets at December 31, 2018 and 2017 consist of the following: 2018 (In thousands) Gross carrying Amount Accumulated amortization Net carrying value Weighted average life in years Developed technology 248,776 176,421 72,355 7.0 Trademarks and trade names 25,643 14,749 10,894 10.5 Customer relationships 328,050 133,068 194,982 10.8 Other 36,306 18,850 17,456 4.1 $ 638,775 $ 343,088 $ 295,687 8.9 2017 (In thousands) Gross carrying amount Accumulated amortization Net carrying value Weighted average life in years Developed technology 206,224 149,215 57,009 6.6 Trademarks and trade names 16,807 13,712 3,095 9.9 Customer relationships 220,806 110,281 110,525 10.3 Other 20,032 8,231 11,801 6.7 $ 463,869 $ 281,439 $ 182,430 8.5 The table below sets forth the amortization expense for the years ended December 31, 2018 , 2017 , and 2016 : (In thousands) 2018 2017 2016 Amortization expense $ 62,152 $ 44,023 $ 44,263 The amortization expense for each of the five succeeding years and thereafter relating to intangible assets currently recorded in the Company’s consolidated balance sheets is estimated to be the following at December 31, 2018 : (In thousands) 2019 2020 2021 2022 2023 Thereafter Total Future amortization expense $ 63,444 $ 42,229 $ 35,771 $ 35,189 $ 34,500 $ 84,554 $ 295,687

Debt

Debt	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Debt	DEBT Long-term debt at December 31, 2018 and 2017 consists of the following: (In thousands) December 31, 2018 December 31, 2017 Senior secured term loan facility due 2021 $ — $ 133,850 Senior secured term loan facility due 2025 400,000 — Senior unsecured notes due 2026 550,000 550,000 950,000 683,850 Unamortized discount and debt issuance costs 11,137 9,470 Total long-term debt 938,863 674,380 Less current maturities of long-term debt 4,000 100,000 Long-term debt less current maturities $ 934,863 $ 574,380 Annual maturities of long-term debt, excluding unamortized discount and issuance costs, due as of December 31, 2018 are as follows: (In thousands) 2019 2020 2021 2022 2023 Thereafter Total Contractual debt obligation maturities* $ 4,000 4,000 4,000 4,000 4,000 930,000 $ 950,000 *Subject to Excess Cash Flow payments to the lenders, see discussion below. In November 2018, the Company entered into the New Term Loan Facility and the New Revolving Facility described below. The Company used the net proceeds of the term loans under the New Term Loan Facility to repay and terminate the Previous Credit Facilities, described below, to pay fees and expenses related to the issuance and the redemption, and for general corporate purposes. Going forward, the Company will use the New Revolving Facility for its general corporate purposes. Debt issuance costs of $5.1 million paid to third parties are capitalized as debt issuance costs in connection with the New Credit Facilities. These debt issuance costs are being amortized as interest expense in the Company’s consolidated statements of operations over the term of the debt instrument using the straight-line method. The term loans under the Previous Term Loan Facility were repaid without premium or penalty at 100% of the outstanding principal amount, plus accrued and unpaid interest. 2026 Senior Unsecured Notes On November 10, 2017 , the Company issued $550 million aggregate principal amount of 4.625% senior unsecured notes due February 10, 2026 . The 2026 Notes were issued under an indenture dated as of November 10, 2017 (the “2026 Notes Indenture”) by and among the Company and Wells Fargo Bank, National Association, as trustee. Interest on the 2026 Notes is payable semi-annually in arrears on February 15 and August 15, which commenced on February 15, 2018. The 2026 Notes are guaranteed, jointly and severally, fully and unconditionally, on a senior unsecured basis, by, subject to certain exclusions, each of the Company’s domestic subsidiaries that guarantee indebtedness under the New Credit Facilities. As provided in the 2026 Notes Indenture, the Company may at its option on one or more occasions redeem all or a part of the 2026 Notes at a redemption price equal to (a) 100% of the principal amount of the 2026 Notes redeemed plus a make-whole premium if redeemed prior to November 10, 2020 , or (b) 100% of the principal amount of the 2026 Notes redeemed plus a percentage of principal amount between 100% and 103.469% of the aggregate principal amount of notes to be redeemed depending on the period of redemption, if redeemed on or after November 10, 2020 , plus, in each case, accrued and unpaid interest on the amount of 2026 Notes being redeemed. Upon a change in control accompanied by certain rating events, the Company is required to offer to repurchase all of the 2026 Notes at a price in cash equal to 101% of the aggregate principal amount thereof, plus accrued and unpaid interest, if any, to, but not including, the date of repurchase. The 2026 Notes Indenture contains covenants that, among other things and subject to certain exceptions, limit the Company’s ability and the ability of the Company’s restricted subsidiaries to create liens, enter into sale and leaseback transactions, engage in consolidations or mergers, or sell, transfer or otherwise dispose of all or substantially all of their assets. The 2026 Notes Indenture also, subject to certain exceptions, limits the ability of any subsidiary of the Company that is not a guarantor under the 2026 Notes to incur indebtedness. The Company is in compliance with all of the above covenants at December 31, 2018 . The 2026 Notes Indenture also provides for events of default which, if certain of them occur, would permit the trustee or the holders of at least 25% in aggregate principal amount of the then outstanding 2026 Notes to declare the principal, premium, if any, interest and any other monetary obligations on all the then-outstanding 2026 Notes to be due and payable immediately. Senior Secured Credit Facilities On November 6, 2018 , the Company entered into a credit and guaranty agreement (the “Credit Agreement”) with Goldman Sachs Bank USA, as administrative agent and collateral agent, and the lenders party thereto, that provides senior secured financing in an aggregate principal amount of $700 million , consisting initially of (a) term loans in an aggregate principal amount of $400 million (the “New Term Loan Facility”) and (b) revolving commitments in an aggregate amount of $300 million (the “New Revolving Facility”, and together with the New Term Loan Facility, the “New Credit Facilities”). Borrowings under the New Credit Facilities bear interest at a rate per annum equal to, at the Company’s option, a base rate (such as prime rate or LIBOR) plus, an applicable margin. The Company’s interest rate on the term loans under the New Term Loan Facility is 4.52% at December 31, 2018 . In addition to paying interest on the outstanding principal under the New Credit Facilities, the Company will pay (i) with respect to the New Term Loan Facility, customary agency fees, and (ii) with respect to the New Revolving Facility, a commitment fee in respect of the unutilized commitments thereunder and customary letter of credit fees and agency fees. The initial commitment fee is 0.20% per annum. The Company may voluntarily prepay outstanding term loans under the New Term Loan Facility at any time without premium or penalty other than customary “breakage’ costs with respect to LIBOR loans, provided, however, that if on or prior to May 6, 2019 the Company prepays any term loan in connection with a repricing transaction, the Company must pay a prepayment premium of 1.00% of the aggregate principle amount of the term loans so prepaid. The company may voluntarily reduce the unutilized portion of the New Revolving Facility and repay outstanding revolving loans under the New Revolving Facility at any time without premium or penalty other than customary “breakage” costs with respect to LIBOR loans. The Credit Agreement requires scheduled quarterly installment payments of 0.25% of the aggregate principal amount of the outstanding term loans commencing March 31, 2019 . The Credit Agreement does not require scheduled amortization under the New Revolving Facility. The Credit Agreement also requires the Company to prepay outstanding term loans, subject to certain exceptions, with (a) up to 50% of the Company’s annual Excess Cash Flow (as defined in the Credit Agreement) and (b) 100% of the net cash proceeds of (i) certain asset sales and casualty and condemnation events, subject to reinvestment rights and certain other exceptions; and (ii) any incurrence or issuance of certain debt, other than debt permitted under the New Credit Facilities. The New Term Loan Facility matures November 6, 2025 and the New Revolving Facility matures November 6, 2023 . At December 31, 2018 the only outstanding amounts under the New Revolving Facility were undrawn outstanding letters of credit of $0.2 million . All obligations under the New Credit Facilities are unconditionally guaranteed by certain of the Company’s wholly-owned domestic subsidiaries and are secured, subject to certain exceptions, by substantially all of the Company’s assets and the assets of the Company’s subsidiaries that have guaranteed the New Credit Facilities. The New Credit Facilities contain a number of negative covenants that, subject to certain exceptions, restrict the Company’s ability and each of the Company’s subsidiaries’ ability to incur additional indebtedness; pay dividends on its capital stock or redeem, repurchase or retire its capital stock or its other indebtedness; make investments, loans and acquisitions, create restrictions on the payment of dividends or other amounts to the Company from the Company’s restricted subsidiaries; engage in transactions with its affiliates; sell assets, including capital stock of its subsidiaries; materially alter the business it conducts; consolidate or merge, incur liens; and engage in sale-leaseback transactions. If at any time, commencing with the fiscal quarter ending March 31, 2019, the Company has revolving borrowings, unreimbursed letter of credit drawings and undrawn letters of credit outstanding in an amount in excess of 35.0% of the commitment amount under the New Revolving Facility, the Credit Agreement requires the Company to maintain a secured net leverage ratio of at least 3.25 to 1.0. The Company is in compliance with all of the above covenants at December 31, 2018 . Previous Senior Secured Loan Facilities On April 30, 2014 , the Company entered into (a) a term loan credit and guaranty agreement with Goldman Sachs Bank USA, as administrative agent, collateral agent, sole lead arranger, sole bookrunner and sole syndication agent, that provided senior secured financing of $460.0 million (the “Previous Term Loan Facility”) and (b) an asset based revolving credit and guaranty agreement with Goldman Sachs Bank USA, as administrative agent, collateral agent, sole lead arranger, sole bookrunner and sole syndication agent, that provided senior secured financing of $75.0 million , subject to a borrowing base (the “Previous ABL Loan Facility”). As stated above, the Previous Term Loan Facility and the Previous ABL Loan Facility were repaid in full in November 2018. The repayment of the Previous Term Loan Facility and the Previous ABL Loan Facility resulted in a loss of $2.3 million on extinguishment of debt, which is included in other expense (income), net in the Company’s consolidated statement of operations.

Lease Commitments

Lease Commitments	12 Months Ended
	Dec. 31, 2018
Leases [Abstract]
Lease Commitments	LEASE COMMITMENTS As of December 31, 2018 , the Company was obligated under noncancellable operating lease agreements for certain sales offices and manufacturing facilities, manufacturing equipment, vehicles, information technology equipment and warehouse space. Future minimum lease payments for noncancellable operating leases with initial or remaining terms in excess of one year as of December 31, 2018 , are as follows: (In thousands) 2019 2020 2021 2022 2023 Thereafter Total Future minimum lease payments $ 11,360 8,906 6,836 5,431 5,208 27,153 $ 64,894 Total rental expense for all equipment and building operating leases for the years ended December 31, 2018 , 2017 and 2016 , were $11.5 million , $10.6 million and $13.3 million , respectively.

Asset Retirement Obligations (N

Asset Retirement Obligations (Notes)	12 Months Ended
	Dec. 31, 2018
Asset Retirement Obligation [Abstract]
Asset Retirement Obligations	ASSET RETIREMENT OBLIGATIONS The Company has asset retirement obligations (AROs) related to environmental disposal obligations associated with cylinders used to supply customers with gas products, and certain restoration obligations associated with its leased facilities. Changes in the carrying amounts of the Company’s AROs for the years ended December 31, 2018 and 2017 are shown below: (In thousands) 2018 2017 Balance at beginning of year $ 12,167 $ 11,529 Liabilities settled (758 ) (577 ) Liabilities incurred 884 412 Accretion expense 510 215 Revision of estimate (260 ) 588 Balance at end of year $ 12,543 $ 12,167 ARO liabilities expected to be settled within twelve months are included in the consolidated balance sheets in other accrued liabilities, while all other ARO liabilities are included in pension benefit obligations and other liabilities in the consolidated balance sheets.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act. The Tax Cuts and Jobs Act made broad and complex changes to the U.S. tax code that affected 2017, most notably a reduction of the U.S. corporate income tax rate from 35 percent to 21 percent for tax years beginning after December 31, 2017. The Tax Cuts and Jobs Act also provided for a one-time transition tax on the mandatory deemed repatriation of cumulative foreign earnings as of December 31, 2017 and the acceleration of depreciation for certain assets placed into service after September 27, 2017 as well as prospective changes beginning in 2018, including the repeal of the domestic manufacturing deduction, additional limitations on executive compensation and limitations on the deductibility of interest. The Security and Exchange Commission (SEC) staff issued Staff Accounting Bulletin (SAB) 118, which provided guidance on accounting for the tax effects of the Tax Cuts and Jobs Act. SAB 118 provided a measurement period that should not extend beyond one year from the Tax Cuts and Jobs Act enactment date for entities to complete the accounting under ASC 740. In accordance with SAB 118, an entity must reflect the income tax effects of those aspects of the Tax Cuts and Jobs Act for which the accounting under Accounting Standards Codification (ASC) 740 is complete. To the extent that an entity’s accounting for certain income tax effects of the Tax Cuts and Jobs Act is incomplete but it is able to determine a reasonable estimate, it must record a provisional estimate in the financial statements. If an entity cannot determine a provisional estimate to be included in the financial statements, it should continue to apply ASC 740 on the basis of the provisions of the tax laws that were in effect immediately before the enactment of the Tax Cuts and Jobs Act. During the tax year ended December 31, 2018, the Company has finalized its accounting for the income tax effects of the Tax Cuts and Jobs Act in accordance with its understanding of the Tax Cuts and Jobs Act and the guidance available as of the date of this filing. The Company recognized the following measurement period adjustments to the provisional amount recorded in its 2017 Annual Report on Form 10-K in connection with the Tax Cuts and Jobs Act. Reduction of U.S. federal corporate tax rate The Company measures deferred tax assets and liabilities using enacted tax rates that will apply in the years in which the temporary differences are expected to be recovered or paid. Accordingly, the Company’s deferred tax assets and liabilities were remeasured to reflect the reduction in the U.S. corporate income tax rate from 35 percent to 21 percent, resulting in a $10.2 million decrease in income tax expense and a corresponding decrease in net deferred tax liabilities for the year ended December 31, 2017. Included in this benefit were provisional amounts related to certain deferred tax assets and liabilities where the necessary information was not available, prepared or analyzed. Examples of this include fixed assets and compensation. The tax return was completed during the reporting period and the Company determined the impact on the remeasurement of deferred tax assets and liabilities to be complete. The Company recognized a measurement period increase to income tax expense of $0.6 million related to the remeasurement of deferred tax assets and liabilities, with a corresponding adjustment to the deferred tax liabilities. Transition Tax on Foreign Earnings The Deemed Repatriation Transition Tax (“Transition Tax”) is a tax on previously untaxed accumulated and current earnings and profits (E&P) of certain of the Company’s foreign subsidiaries. To calculate the amount of the Transition Tax, the Company must determine, in addition to other factors, the amount of post-1986 E&P of the relevant subsidiaries, as well as the amount of non-U.S. income taxes paid on such earnings. The Company recognized provisional income tax expense of $73.0 million for the year ended December 31, 2017 related to the one-time Transition Tax on certain foreign earnings. On the basis of revised E&P computations that were completed during the reporting period, the Company has determined the Transition Tax calculation to be complete. The Company recognized an additional measurement-period adjustment of $0.1 million to the Transition Tax obligation, with a corresponding increase of $0.1 million to income tax expense. Acceleration of Depreciation The Company recorded a provisional benefit of $1.3 million attributable to the accelerated depreciation for certain assets placed into service after September 27, 2017. This resulted in a decrease of approximately $3.2 million to the current income tax payable and a corresponding increase in the deferred tax liabilities of approximately $1.9 million (after considering the effects of the reduction in income tax rates). The tax return was completed during the reporting period and the Company has determined the calculation attributable to accelerated depreciation to be complete. The Company recognized an additional measurement period adjustment decrease to income tax benefit, decrease to deferred tax liability and increase to income tax payable of $0.3 million , $0.4 million , and $0.7 million , respectively, during the measurement period. Executive Compensation under Sec. 162(m) The Tax Cuts and Jobs Act repeals the exceptions to the section 162(m) deduction limitation for commissions and performance-based compensation. The Tax Cuts and Jobs Act provides a transition rule which states that the expansion of section 162(m) does not apply to any remuneration paid under a written, binding contract in effect on November 2, 2017, which was not materially modified on or after this date. The Tax Cuts and Jobs Act did not specifically define the criteria for a binding contract and no further guidance was provided on this topic during the tax year ended December 31, 2017. Additional guidance in the form of IRS Notice 2018-68 was received during the year ended December 31, 2018. Based on analysis of IRS Notice 2018-68, the Company determined there would be an immaterial impact to the 162(m) calculation. The Company has determined the calculation to be complete and the change remains immaterial during the measurement period. Global Intangible Low Taxed Income (GILTI) The U.S. tax law changes created new rules that allow the Company to make an accounting policy election to treat taxes due on GILTI inclusions in taxable income as either a current period expense or reflect such inclusions related to temporary basis differences in the Company’s measurement of deferred taxes. The Company has elected to treat the GILTI inclusion as a current period expense. The Company recorded tax expense related to GILTI of $2.3 million for the tax year ended December 31, 2018. Undistributed Foreign Earnings At December 31, 2018, there were approximately $32.9 million of accumulated undistributed earnings of subsidiaries outside of the United States, all of which are considered to be indefinitely reinvested. Management estimates that no material withholding taxes would be incurred if these undistributed earnings were distributed. Income before income taxes for the years ended December 31, 2018 , 2017 and 2016 was derived from the following sources: (In thousands) 2018 2017 2016 Domestic $ 61,545 $ 13,363 $ (7,328 ) Foreign 192,887 171,368 127,327 Income before income tax expense $ 254,432 $ 184,731 $ 119,999 Income tax expense for the years ended December 31, 2018 , 2017 and 2016 is summarized as follows: (In thousands) 2018 2017 2016 Current: Federal $ (14,775 ) $ 60,529 $ 7,759 State 1,605 808 (10 ) Foreign 38,723 36,700 31,387 25,553 98,037 39,136 Deferred (net of valuation allowance): Federal (13,399 ) 249 (8,183 ) State (370 ) (891 ) 250 Foreign 1,893 2,270 (8,351 ) (11,876 ) 1,628 (16,284 ) Income tax expense $ 13,677 $ 99,665 $ 22,852 Income tax (benefit) expense differs from the expected amounts based upon the statutory federal tax rates for the years ended December 31, 2018 , 2017 and 2016 as follows: (In thousands) 2018 2017 2016 Expected federal income tax at statutory rate $ 53,431 $ 64,656 $ 42,000 State income taxes before valuation allowance, net of federal tax effect 605 (1,376 ) (769 ) Effect of foreign source income 2,359 (27,581 ) (22,242 ) Tax contingencies 468 2,816 1,103 Valuation allowance 527 3,195 1,713 U.S. federal research credit (2,263 ) (4,881 ) (1,676 ) Equity compensation (3,826 ) (2,321 ) 815 Transition tax 89 72,993 — Remeasurement of deferred taxes 619 (10,248 ) — Incremental taxes on unremitted foreign earnings release — 3,968 — Foreign derived intangible income (4,846 ) — — Legal entity restructuring foreign tax credit (25,080 ) — — Legal entity restructuring dividends received deduction (9,398 ) — — Other items, net 992 (1,556 ) 1,908 Income tax expense $ 13,677 $ 99,665 $ 22,852 In 2012, Entegris’ Korean subsidiary made commitments to produce a certain line of products in Korea. In return for this commitment, the Company has a tax holiday on income earned on sales of these products for five years and a partial holiday for two additional years. The income tax benefits attributable to this tax holiday are $4.0 million ( $0.03 per diluted share), $7.4 million ( $0.05 per diluted share) and $3.3 million ( $0.02 per diluted share) for the years ended December 31, 2018, 2017 and 2016, respectively. The 2017 and 2016 effective tax rates include additional benefits of $4.3 million and $1.9 million , respectively, because the corporate tax rate in Korea is lower than the U.S. rate. The 2018 effective tax rate no longer includes additional benefits as the U.S. corporate tax rate is lower that the Korean tax rate. The Company also has made employment and spending commitments to Singapore. In return for those commitments, the Company has been granted a partial tax holiday for eight years starting in 2013. During 2017, this agreement was extended to 2027 in exchange for revised employment and spending commitments. The income tax benefits attributable to the tax status are $6.3 million ( $0.04 per diluted share), $4.7 million ( $0.03 per diluted share) and $2.3 million ( $0.02 per diluted share) for the years ending December 31, 2018, 2017 and 2016, respectively. The 2018, 2017 and 2016 effective tax rates include additional benefits of $3.6 million , $12.4 million and $6.5 million , because the corporate tax rate in Singapore is lower than the U.S. rate. The significant components of the Company’s deferred tax assets and deferred tax liabilities at December 31, 2018 and 2017 are as follows: (In thousands) 2018 2017 Deferred tax assets attributable to: Accounts receivable $ 247 $ 32 Inventory 4,085 4,132 Accruals not currently deductible for tax purposes 8,694 8,641 Net operating loss and credit carryforwards 15,878 15,184 Capital loss carryforward 2,450 2,391 Equity compensation 3,054 3,658 Asset impairments 452 452 Other, net 3,488 2,549 Gross deferred tax assets 38,348 37,039 Valuation allowance (18,079 ) (17,494 ) Total deferred tax assets 20,269 19,545 Deferred tax liabilities attributable to: Purchased intangible assets (50,128 ) (28,956 ) Depreciation (3,874 ) (2,512 ) Total deferred tax liabilities (54,002 ) (31,468 ) Net deferred tax liabilities $ (33,733 ) $ (11,923 ) Deferred tax assets are generally required to be reduced by a valuation allowance if, based on the weight of available positive and negative evidence, it is more likely than not that some portion or all of the deferred tax assets will not be realized. As of December 31, 2018 and 2017 , the Company had a net U.S. deferred tax liability of $24.5 million and $5.1 million , respectively, which are composed of temporary differences and various tax credit carryforwards. Of the $24.5 million net U.S. deferred tax liability, $34.6 million relates to the acquisition of the SAES Pure Gas business during the year ended December 31, 2018. Management believes that it is more likely than not that the benefit from certain state net operating loss carryforwards, state credits, capital asset impairments, and a federal capital loss carryforward will not be realized. In recognition of this risk, management has provided a valuation allowance of $10.7 million and $10.6 million as of December 31, 2018 and 2017 , respectively, on the related deferred tax assets. If the assumptions change and management determines the assets will be realized, the tax benefits relating to any reversal of the valuation allowance on deferred tax assets at December 31, 2018 will be recognized as a reduction of income tax expense. At December 31, 2018 , the Company had state operating loss and credit carryforwards of approximately $8.0 million , which begin to expire in 2019 and foreign operating loss carryforwards of $26.6 million , which begin to expire in 2019 . As of December 31, 2018 and 2017 , the Company had a net non-U.S. deferred tax asset of $8.8 million and $10.7 million , respectively, for which management determined based upon the available evidence a valuation allowance of $7.3 million and $6.9 million as of December 31, 2018 and 2017, respectively, was required against the non-U.S. gross deferred tax assets. For other non-U.S. jurisdictions, management is relying upon projections of future taxable income to utilize deferred tax assets. Benefits from tax positions should be recognized in the financial statements only when it is more likely than not that the tax positions will be sustained upon examination by the appropriate taxing authority that would have full knowledge of all relevant information. A tax position that meets the more-likely-than-not recognition threshold is measured at the largest amount of benefit that is greater than fifty percent likely of being realized upon ultimate settlement. Tax positions that fail to meet the more-likely-than-not recognition threshold should be recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not recognition threshold should be derecognized in the first subsequent financial reporting period in which that threshold is no longer met. The provisions also provide guidance on the accounting for and disclosure of unrecognized tax benefits, interest and penalties. Reconciliations of the beginning and ending balances of the total amounts of gross unrecognized tax benefits for the years ended December 31, 2018 and 2017 are as follows: (In thousands) 2018 2017 Gross unrecognized tax benefits at beginning of year $ 12,561 $ 8,293 Increase in tax positions from prior years 61 298 Decrease in tax positions from prior years (234 ) — Increases in tax positions for current year 2,970 4,724 Settlement of tax positions for current year (2,577 ) — Lapse in statute of limitations (486 ) (754 ) Gross unrecognized tax benefits at end of year $ 12,295 $ 12,561 The total amount of net unrecognized tax benefits that, if recognized, would affect the effective tax rate was $9.3 million at December 31, 2018 . Penalties and interest paid or received are recorded in other income, net, in the consolidated statements of operations. For the years ended December 31, 2018 and 2017 , the Company has accrued interest and penalties related to unrecognized tax benefits of $1.7 million and $1.0 million , respectively. Expenses of $0.8 million , $0.3 million and $0.1 million were recognized as interest and penalties in the consolidated statements of operations for the years ended December 31, 2018 , 2017 and 2016 , respectively. The Company files income tax returns in the U.S. and in various state, local and foreign jurisdictions. The statutes of limitations related to both the consolidated Federal income tax return and state returns are closed for all years up to and including 2014 and 2014 , respectively. With respect to foreign jurisdictions, the statute of limitations varies from country to country, with the earliest open year for the Company’s major foreign subsidiaries being 2012 . Due to the expiration of various statutes of limitations and settlement of audits, it is reasonably possible that the Company’s gross unrecognized tax benefit balance may decrease within the next twelve months by approximately $1.2 million .

Equity

Equity	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Equity	EQUITY Dividend Holders of the Company’s common stock are entitled to receive dividends when and if they are declared by the Company’s Board of Directors. The Company’s Board of Directors declared a cash dividend of $0.07 per share during the first, second, third and fourth quarters of 2018, which totaled $39.7 million . During 2017, the Company’s Board of Directors declared a cash dividend of $0.07 per share during the fourth quarter, which totaled $9.9 million . On January 16, 2019, the Company’s Board of Directors declared a quarterly cash dividend of $0.07 per share to be paid on February 20, 2019 to shareholders of record as of January 30, 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. Furthermore, the credit agreements governing the New Credit Facilities contain restrictions that may limit our ability to pay dividends. Share Repurchase Program On February 13, 2018, the Company’s Board of Directors authorized a repurchase program covering up to an aggregate of $100.0 million of the Company’s common stock in open market transactions and in accordance with one or more pre-arranged stock trading plans established in accordance with Rule 10b5-1 under the Securities and Exchange Act of 1934, as amended, over a period twenty-four months. On November 19, 2018, the Company’s Board of Directors authorized the Company to repurchase an additional $250 million of its common stock under its repurchase program for a total repurchase amount of $350 million. The repurchase program represents a renewal and replacement of the repurchase program originally authorized on February 5, 2016, which had been subsequently renewed on February 15, 2017. The Company repurchased $179.3 million of shares and $28.0 million of shares for the years ended December 31, 2018 and December 31, 2017, respectively. 2010 Stock Plan In 2009, the Company’s Board of Directors approved the 2010 Stock Plan, subject to the approval by the Company’s stockholders in 2010. The 2010 Stock Plan replaced the predecessor plans for future stock awards and stock option grants. Subsequent to the acquisition of ATMI, Inc. in 2014, the Company’s Board of Directors approved the absorption of 5.7 million additional shares of the ATMI, Inc. 2010 Stock Plan (ATMI Plan) into the Company’s 2010 Stock Plan for the remaining term of the ATMI Plan. The 2010 Stock Plan has a term of ten years and provides for the issuance of stock options and other share-based awards to selected employees, directors, and other individuals or entities that provide services to the Company or its affiliates. Under the 2010 Stock Plan, the Board of Directors or a committee selected by the Board of Directors will determine for each award, the term, price, number of shares, rate at which each award is exercisable and whether restrictions are imposed on the shares subject to the awards. The exercise price for option awards generally may not be less than the fair market value per share of the underlying common stock on the date granted. The 2010 Stock Plan allows that after December 31, 2009 any stock awards that were awarded from the expired plans mentioned above that are forfeited, expired or otherwise terminated without issuance of such stock award again be available for issuance under the 2010 Stock Plan. Stock Options Stock option activity for the 2010 Stock Plan and predecessor plans for the years ended December 31, 2018 , 2017 and 2016 is summarized as follows: 2018 2017 2016 (Shares in thousands) Number of shares Weighted average exercise price Number of shares Weighted average exercise price Number of shares Weighted average exercise price Options outstanding, beginning of year 1,869 $ 13.46 1,907 $ 11.54 2,139 $ 10.57 Granted 296 31.10 335 21.60 549 12.20 Exercised (727 ) 10.89 (359 ) 10.89 (633 ) 8.66 Expired or forfeited (28 ) 26.41 (14 ) 12.78 (148 ) 12.32 Options outstanding, end of year 1,410 $ 18.22 1,869 $ 13.46 1,907 $ 11.54 Options exercisable, end of year 562 $ 13.68 872 $ 11.11 776 $ 10.65 Options outstanding for the Company’s stock plans at December 31, 2018 are summarized as follows: (Shares in thousands) Options outstanding Options exercisable Range of exercise prices Number outstanding Weighted average remaining life in years Weighted- average exercise price Number exercisable Weighted average exercise $9.88 to $11.71 107 1.8 years $ 11.09 107 $ 11.09 $12.20 to $12.20 438 4.1 years 12.20 190 12.20 $13.49 to $13.49 271 3.1 years 13.49 189 13.49 $21.60 to $21.60 313 5.1 years 21.60 76 21.60 $31.10 to $31.10 281 6.1 years 31.10 — — 1,410 4.4 years 18.22 562 13.68 The weighted average remaining contractual term for options outstanding and exercisable for all plans at December 31, 2018 was 4.4 years and 3.5 years, respectively. For all plans, the Company had shares available for future grants of 8.7 million shares, 8.8 million shares, and 9.4 million shares at December 31, 2018 , 2017 and 2016 , respectively. For all plans, the total pre-tax intrinsic value of stock options exercised during the years ended December 31, 2018 and 2017 was $16.7 million and $4.8 million , respectively. The aggregate intrinsic value, which represents the total pre-tax intrinsic value based on the Company’s closing stock price of $27.90 at December 31, 2018 , which theoretically could have been received by the option holders had all option holders exercised their options as of that date, was $14.6 million and $8.0 million for options outstanding and options exercisable, respectively. Share-based payment awards in the form of stock option awards for 0.3 million , 0.3 million and 0.5 million options were granted to employees during the years ended December 31, 2018 , 2017 and 2016 . Compensation expense is based on the grant date fair value. The awards vest annually over a three -year or four -year period and have a contractual term of 7 years. The Company estimates the fair value of stock options using the Black-Scholes valuation model. Key inputs and assumptions used to estimate the fair value of stock options include the grant price of the award, the expected option term, volatility of the Company’s stock, the risk-free rate and the Company’s dividend yield. Estimates of fair value are not intended to predict actual future events or the value ultimately realized by employees who receive equity awards, and subsequent events are not indicative of reasonableness of the original estimates of fair value made by the Company. The fair value of each stock option grant was estimated at the date of grant using a Black-Scholes option pricing model. The following table presents the weighted-average assumptions used in the valuation and the resulting weighted-average fair value per option granted for the years ended December 31, 2018 , 2017 and 2016 : Employee stock options: 2018 2017 2016 Volatility 28.7 % 26.9 % 27.6 % Risk-free interest rate 2.4 % 1.7 % 1.1 % Dividend yield 0.9 % — % — % Expected life (years) 3.9 4.1 4.0 Weighted average fair value per option $ 7.35 $ 5.25 $ 2.85 A historical daily measurement of volatility is determined based on the expected life of the option granted. The risk-free interest rate is determined by reference to the yield on an outstanding U.S. Treasury note with a term equal to the expected life of the option granted. Expected life is determined by reference to the Company’s historical experience. The Company determines the dividend yield by dividing the expected annual dividend on the Company’s stock by the option exercise price. Employee Stock Purchase Plan The Company maintains the Entegris, Inc. Amended and Restated Employee Stock Purchase Plan (ESPP). The ESPP allows employees to elect, at six-month intervals, to contribute up to 10% of their compensation, subject to certain limitations, to purchase shares of common stock at a discount of 15% from the fair market value on the first day or last day of each six-month period. The Company treats the ESPP as a compensatory plan. At December 31, 2018 , 1.9 million shares remained available for issuance under the ESPP. Employees purchased 0.2 million shares, 0.2 million shares, and 0.3 million shares, at a weighted-average price of $24.86 , $16.92 , and $11.56 during the years ended December 31, 2018 , 2017 and 2016 , respectively. Restricted Stock Units Restricted stock units are awards of common stock made under the 2010 Stock Plan that are subject to a risk of forfeiture if the awardee terminates employment with the Company prior to the lapse of the restrictions. The value of such restricted stock units is determined using the market price on the grant date. Compensation expense for restricted stock units is generally recognized using the straight-line single-option method. A summary of the Company’s restricted stock unit activity for the years ended December 31, 2018 , 2017 and 2016 is presented in the following table: 2018 2017 2016 (Shares in thousands) Number of shares Weighted average grant date fair value Number of shares Weighted average grant date fair value Number of shares Weighted average grant date fair value Unvested, beginning of year 1,857 $ 15.86 2,164 $ 12.49 1,882 $ 12.25 Granted 509 31.40 659 22.14 1,249 12.42 Vested (732 ) 15.07 (801 ) 12.22 (711 ) 11.74 Forfeited (115 ) 18.58 (165 ) 14.48 (256 ) 12.44 Unvested, end of year 1,519 21.24 1,857 15.86 2,164 12.49 The weighted average remaining contractual term for unvested restricted shares at December 31, 2018 and 2017 was 1.9 years and 2.1 years, respectively. During the years ended December 31, 2018 , 2017 and 2016 , the Company awarded performance stock for up to 0.2 million shares, 0.1 million shares and 0.2 million shares, respectively, to be issued upon the achievement of performance conditions under the Company’s 2010 Stock Plan to certain officers and other key employees. Compensation expense is based on the grant date fair value. The awards vest on the third anniversary of the award date. The Company estimates the fair value of the Performance shares using a Monte Carlo simulation process. As of December 31, 2018 , the total compensation cost related to unvested stock options, performance stock and restricted stock unit awards not yet recognized was $3.0 million , $2.2 million and $20.6 million , respectively, and is expected to be recognized over the next 2.4 years on a weighted-average basis. Valuation and Expense Information The Company recognizes compensation expense for all share-based payment awards made to employees and directors based on their estimated fair values on the date of grant. Compensation expense is recognized using the straight-line attribution method to recognize share-based compensation over the service period of the award, with adjustments recorded for forfeitures as they occur. The following table summarizes the allocation of share-based compensation expense related to employee stock options, restricted stock awards and grants under the employee stock purchase plan for the years ended December 31, 2018 , 2017 and 2016 : (In thousands) 2018 2017 2016 Cost of sales $ 1,009 $ 1,031 $ 1,579 Engineering, research and development expenses 1,689 1,457 1,124 Selling, general and administrative expenses 14,414 12,818 10,733 Share-based compensation expense 17,112 15,306 13,436 Tax benefit 3,421 4,978 4,153 Share-based compensation expense, net of tax $ 13,691 $ 10,328 $ 9,283

Benefit Plans

Benefit Plans	12 Months Ended
	Dec. 31, 2018
Defined Benefit Plan [Abstract]
Benefit Plans	BENEFIT PLANS 401(k) Plan The Company maintains the Entegris, Inc. 401(k) Savings and Profit Sharing Plan (the 401(k) Plan) that qualifies as a deferred salary arrangement under Section 401(k) of the Internal Revenue Code. Under the Plan, eligible employees may defer a portion of their pre-tax wages, up to the Internal Revenue Service annual contribution limit. Entegris matches employees’ contributions to a maximum match of 4% of the employee’s eligible wages. The employer matching contribution expense under the Plan was $6.1 million , $5.1 million and $4.9 million in the fiscal years ended December 31, 2018 , 2017 and 2016 , respectively. Defined Benefit Plans The employees of the Company’s subsidiaries in Japan, Taiwan and Germany are covered in defined benefit pension plans. The Company uses a December 31 measurement date for its pension plans. The tables below set forth the Company’s estimated funded status as of December 31, 2018 and 2017 : (In thousands) 2018 2017 Change in benefit obligation: Benefit obligation at beginning of year $ 7,682 $ 7,073 Service cost 50 38 Interest cost 62 46 Actuarial (gain) loss 75 302 Benefits paid (560 ) (222 ) Other 11 7 Foreign exchange impact (12 ) 438 Benefit obligation at end of year 7,308 7,682 Change in plan assets: Fair value of plan assets at beginning of year 908 743 Return on plan assets 31 5 Employer contributions 110 88 Benefits paid (185 ) — Foreign exchange impact (29 ) 72 Fair value of plan assets at end of year 835 908 Funded status: Plan assets less than benefit obligation - Net amount recognized $ (6,473 ) $ (6,774 ) Amounts recognized in the consolidated balance sheets consist of: (In thousands) 2018 2017 Noncurrent liability $ (6,473 ) $ (6,774 ) Accumulated other comprehensive loss, net of taxes 860 919 Amounts recognized in accumulated other comprehensive loss, net of tax consist of: (In thousands) 2018 2017 Net actuarial loss $ 514 $ 490 Prior service cost 616 705 Gross amount recognized 1,130 1,195 Deferred income taxes (270 ) (276 ) Net amount recognized $ 860 $ 919 Information for pension plans with an accumulated benefit obligation in excess of plan assets: (In thousands) 2018 2017 Projected benefit obligation $ 6,473 $ 6,774 Accumulated benefit obligation 6,235 6,497 Fair value of plan assets 835 908 The components of the net periodic benefit cost for the years ended December 31, 2018 , 2017 and 2016 were as follows: (In thousands) 2018 2017 2016 Pension benefits: Service cost $ 50 $ 38 $ 66 Interest cost 62 46 91 Expected return on plan assets (18 ) (11 ) (10 ) Amortization of prior service cost 69 69 65 Amortization of net transition obligation — 22 — Amortization of plan loss 20 — — Recognized actuarial net loss — — 17 Net periodic pension benefit cost $ 183 $ 164 $ 229 The estimated amount that will be amortized from accumulated other comprehensive income into net periodic benefit cost in 2019 is as follows: (In thousands) Prior service cost $ 68 Net actuarial loss 17 $ 85 Assumptions used in determining the benefit obligation and net periodic benefit cost for the Company’s pension plans for the years ended December 31, 2018 , 2017 and 2016 are presented in the following table as weighted-averages: 2018 2017 2016 Benefit obligations: Discount rate 0.76 % 0.82 % 0.63 % Rate of compensation increase 3.08 % 3.05 % 2.90 % Net periodic benefit cost: Discount rate 1.66 % 1.45 % 1.70 % Rate of compensation increase 3.18 % 3.00 % 3.43 % Expected return on plan assets 1.89 % 1.80 % 1.43 % The plans’ expected return on assets as shown above is based on management’s expectations of long-term average rates of return to be achieved by the underlying investment portfolios. In establishing this assumption, management considers historical and expected returns for the asset classes in which the plans are invested, as well as current economic and capital market conditions. The discount rate primarily used by the Company is based on market yields at the valuation date on government bonds as well as the estimated maturity of benefit payments. Plan Assets At December 31, 2018 , the majority of the Company’s pension plan assets are deposited in Bank of Taiwan in the form of money market funds, where the Bank of Taiwan is the assigned funding vehicle for the statutory retirement benefit. The remaining portion of the Company’s plan assets is deposited in a German insurance company’s investment fund. The fair value measurements of the Company’s pension plan assets at December 31, 2018 , by asset category are as follows: (In thousands) Quoted prices in active markets for identical assets Significant observable inputs Significant unobservable inputs Asset category Total (Level 1) (Level 2) (Level 3) Taiwan plan assets (a) $ 669 $ 669 — — Germany plan assets (b) $ 166 $ 166 — — $ 835 $ 835 — — (a) This category includes investments in the government of Taiwan’s pension fund. The government of Taiwan is responsible for the strategy and allocation of the investment contributions. (b) This category includes investments in an insurer’s balanced asset fund. The insurer is responsible for the strategy and allocation of the investment contributions. The Company selects a pre-packaged portfolio pooled investment fund that is conservative. The majority of the funs are invested broadly in German mortgage bonds, construction loans and government bonds with good credit rating. The fair value measurements of the Company’s pension plan assets at December 31, 2017 , by asset category are as follows: (In thousands) Quoted prices in active markets for identical assets Significant observable inputs Significant unobservable inputs Asset category Total (Level 1) (Level 2) (Level 3) Taiwan plan assets (a) $ 830 $ 830 — — Germany plan assets (b) $ 78 $ 78 — — $ 908 $ 908 — — (a) This category includes investments in the government of Taiwan’s pension fund. The government of Taiwan is responsible for the strategy and allocation of the investment contributions. (b) This category includes investments in an insurer’s balanced asset fund. The insurer is responsible for the strategy and allocation of the investment contributions. The Company selects a pre-packaged portfolio pooled investment fund that is conservative. The majority of the funs are invested broadly in German mortgage bonds, construction loans and government bonds with good credit rating. Cash Flows The Company expects to make the following contributions and benefit payments: (In thousands) Contributions Payments 2019 $ 93 $ 36 2020 — 33 2021 — 217 2022 — 201 2023 — 251 Years 2024-2028 — 2,197

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Disclosures	FAIR VALUE MEASUREMENTS Generally accepted accounting principles establish a fair value hierarchy that prioritizes the inputs used to measure fair value. The three levels of the fair value hierarchy are as follows: Level 1—Quoted prices in active markets accessible at the reporting date for identical assets and liabilities. Level 2—Quoted prices for similar assets or liabilities in active markets. Quoted prices for identical or similar assets and liabilities in markets that are not considered active or financial instruments for which all significant inputs are observable, either directly or indirectly. Level 3—Prices or valuations that require inputs that are significant to the valuation and are unobservable. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Financial Assets Measured at Fair Value on a Recurring Basis The following table presents the Company’s financial assets and liabilities that are measured at fair value on a recurring basis at December 31, 2018 and 2017 . December 31, 2018 December 31, 2017 (In thousands) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets: Other current assets Foreign currency contracts (a) $ — $ — $ — $ — $ — $ 36 $ — $ 36 Total assets measured and recorded at fair value $ — $ — $ — $ — $ — $ 36 $ — $ 36 Liabilities: Other accrued liabilities Foreign currency contracts (a) $ — $ 589 $ — $ 589 $ — $ — $ — $ — Total liabilities measured and recorded at fair value $ — $ 589 $ — $ 589 $ — $ — $ — $ — (a) Based on observable market transactions of spot currency rates and forward rates on equivalently-termed instruments. A reconciliation of the net fair value of foreign currency contract assets and liabilities subject to master netting arrangements that are recorded in the December 31, 2018 and 2017 consolidated balance sheets to the net fair value that could have been reported in the respective consolidated balance sheet is as follows: December 31, 2018 December 31, 2017 (In thousands) Gross Gross Net amount Gross Gross Net amount of assets in the Foreign exchange forward contracts $ 589 $ — $ 589 $ 36 $ — $ 36 Losses associated with derivatives are recorded in other expense (income), net, in the consolidated statements of operations. Losses associated with derivative instruments not designated as hedging instruments for the years ended December 31, 2018 , 2017 and 2016 were as follows: (In thousands) 2018 2017 2016 Losses on foreign currency forward contracts $ (1,287 ) $ (2,209 ) $ (1,647 )

Earning Per Share (EPS)

Earning Per Share (EPS)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Earning Per Share (EPS)	EARNINGS PER SHARE (EPS) Basic EPS is computed by dividing net income by the weighted average number of shares of common stock outstanding during each period. The following table presents a reconciliation of the share amounts used in the computation of basic and diluted earnings per share: (In thousands) 2018 2017 2016 Basic earnings per share—Weighted common shares outstanding 141,026 141,553 141,093 Weighted common shares assumed upon exercise of options and vesting of restricted stock units 1,584 1,965 957 Diluted earnings per share—Weighted common shares outstanding 142,610 143,518 142,050 The Company excluded the following shares underlying stock-based awards from the calculations of diluted EPS because their inclusion would have been anti-dilutive for the years ended December 31, 2018 , 2017 and 2016 : (In thousands) 2018 2017 2016 Shares excluded from calculations of diluted EPS 267 303 434

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION The Company’s financial segment reporting reflects an organizational alignment intended to leverage the Company’s unique portfolio of capabilities to create value for its customers by developing mission-critical solutions to maximize manufacturing yields and enable higher performance of devices. While these segments have separate products and technical know-how, they share a global generalist sales force, common business systems and processes, technology centers, and strategic and technology roadmaps. The Company leverages its expertise from these three segments to create new and increasingly integrated solutions for its customers. The Company’s business is reported in the following segments: • Specialty Chemicals and Engineered Materials (SCEM): SCEM provides high-performance and high-purity process chemistries, gases, and materials and safe and efficient delivery systems to support semiconductor and other advanced manufacturing processes. • Microcontamination Control (MC): MC solutions purify critical liquid chemistries and gases used in semiconductor manufacturing processes and other high-technology industries. • Advanced Materials Handling (AMH): AMH develops solutions to monitor, protect, transport, and deliver critical liquid chemistries and substrates for a broad set of applications in the semiconductor industry and other high-technology industries. Inter-segment sales are not significant. In the first quarter of 2018, the Company updated its definition of segment profit. Segment profit is now defined as net sales less direct segment operating expenses, including certain general and administrative costs for the Company’s human resources, finance and information technology functions previously unallocated by the Company. The remaining unallocated expenses consist mainly of the Company’s corporate functions as well as interest expense, amortization of intangible assets and income tax expense. Prior year information was recast to reflect the change in the Company’s definition of segment profit. Corporate assets consist primarily of cash and cash equivalents, deferred tax assets and deferred tax charges. Summarized financial information for the Company’s reportable segments is shown in the following tables. (In thousands) 2018 2017 2016 Net sales: SCEM $ 530,241 $ 485,470 $ 428,328 MC 552,844 436,225 362,658 AMH 467,412 420,837 384,284 Total net sales $ 1,550,497 $ 1,342,532 $ 1,175,270 ( In thousands ) 2018 2017 2016 Segment profit: SCEM $ 129,754 $ 111,802 $ 77,328 MC 173,964 141,413 93,911 AMH 82,541 59,838 56,282 Total segment profit $ 386,259 $ 313,053 $ 227,521 ( In thousands ) 2018 2017 2016 Total assets: SCEM $ 757,381 $ 749,379 $ 766,126 MC 680,080 251,216 200,399 AMH 359,991 278,079 267,085 Corporate 520,189 697,498 465,922 Total assets $ 2,317,641 $ 1,976,172 $ 1,699,532 (In thousands) 2018 2017 2016 Depreciation and amortization: SCEM $ 70,329 $ 66,514 $ 64,959 MC 33,590 13,744 9,995 AMH 22,805 21,003 23,697 Corporate 544 970 1,235 Total depreciation and amortization $ 127,268 $ 102,231 $ 99,886 (In thousands) 2018 2017 2016 Capital expenditures: SCEM $ 44,337 $ 44,350 $ 23,138 MC 38,331 27,178 9,880 AMH 26,545 18,378 31,634 Corporate 940 3,691 608 Total capital expenditures $ 110,153 $ 93,597 $ 65,260 The following table reconciles total segment profit to income before income taxes and equity in net loss of affiliate: (In thousands) 2018 2017 2016 Total segment profit $ 386,259 $ 313,053 $ 227,521 Less: Amortization of intangibles 62,152 44,023 44,263 Unallocated general and administrative expenses 31,418 27,213 27,722 Operating income 292,689 241,817 155,536 Interest expense 34,094 32,343 36,846 Interest income (3,839 ) (715 ) (318 ) Other expense (income), net 8,002 25,458 (991 ) Income before income tax expense $ 254,432 $ 184,731 $ 119,999 In the following tables, revenue is disaggregated by country or region based on the ship to location of the customer for the years ended December 31, 2018 , 2017 and 2016 : (In thousands) 2018 SCEM MC AMH Total Taiwan $ 104,707 $ 118,208 $ 66,948 $ 289,863 United States 133,834 94,427 118,771 347,032 South Korea 82,890 74,623 84,883 242,396 Japan 52,731 110,997 47,027 210,755 China 68,365 84,652 51,368 204,385 Europe 32,088 40,635 65,352 138,075 Southeast Asia 55,626 29,302 33,063 117,991 $ 530,241 $ 552,844 $ 467,412 $ 1,550,497 2017 (In thousands) SCEM MC AMH Total Taiwan $ 113,279 $ 109,815 $ 66,620 $ 289,714 United States 117,602 70,834 97,903 286,339 South Korea 74,773 65,677 76,418 216,868 Japan 41,164 89,638 38,678 169,480 China 64,796 45,382 38,712 148,890 Europe 30,472 30,479 59,530 120,481 Southeast Asia 43,384 24,400 42,976 110,760 $ 485,470 $ 436,225 $ 420,837 $ 1,342,532 (In thousands) 2016 SCEM MC AMH Total Taiwan $ 107,806 $ 109,509 $ 73,994 $ 291,309 United States 98,436 57,594 97,838 253,868 South Korea 57,538 36,477 51,646 145,661 Japan 31,232 86,927 37,862 156,021 China 58,282 27,544 32,609 118,435 Europe 29,890 24,866 51,023 105,779 Southeast Asia 45,144 19,741 39,312 104,197 $ 428,328 $ 362,658 $ 384,284 $ 1,175,270 The following table summarizes property, plant and equipment, net, attributed to significant countries for the years ended December 31, 2018 , 2017 and 2016 : (In thousands) 2018 2017 2016 Property, plant and equipment: United States $ 289,049 $ 257,584 $ 226,394 South Korea 41,698 39,562 33,441 Japan 34,276 23,648 25,248 Malaysia 31,138 19,212 19,180 Taiwan 18,804 16,073 14,151 Other 4,564 3,444 3,148 $ 419,529 $ 359,523 $ 321,562 In the years ended December 31, 2018 , 2017 and 2016 , Taiwan Semiconductor Manufacturing Company Limited, accounted for $153.9 million , $167.9 million and $161.9 million of net sales, respectively, all of which include sales from all of the Company’s segments. In addition, in the year ended December 31, 2018 and 2017 , Samsung Electronics Co. accounted for $164.3 million and $140.6 million of net sales, respectively, which include sales from all of the Company’s segments.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	COMMITMENTS AND CONTINGENT LIABILITIES The Company is subject to various claims, legal actions, and complaints arising in the ordinary course of business. The Company believes the final outcome of these matters will not have a material adverse effect on its consolidated financial statements. The Company expenses legal costs as incurred.

Quarterly Information-Unaudited

Quarterly Information-Unaudited	12 Months Ended
	Dec. 31, 2018
Selected Quarterly Financial Information [Abstract]
Quarterly Information-Unaudited	QUARTERLY INFORMATION-UNAUDITED Fiscal quarter ended (In thousands, except per share data) March 31, 2018 June 30, 2018 September 29, 2018 December 31, 2018 Net sales $ 367,199 $ 383,059 $ 398,597 $ 401,642 Gross profit 175,997 182,378 181,716 179,740 Net income 57,562 54,349 48,060 80,784 Basic net income per common share 0.41 0.38 0.34 0.58 Diluted net income per common share 0.40 0.38 0.34 0.57 Fiscal quarter ended (In thousands, except per share data) April 1, 2017 July 1, 2017 September 30, 2017 December 31, 2017 Net sales $ 317,377 $ 329,002 $ 345,591 $ 350,562 Gross profit 139,596 150,303 155,407 163,679 Net income (loss) 32,514 39,991 40,902 (28,341 ) Basic net income (loss) per common share 0.23 0.28 0.29 (0.20 ) Diluted net income (loss) per common share 0.23 0.28 0.28 (0.20 )

Subsequent Event Subsequent Eve

Subsequent Event Subsequent Event	12 Months Ended
	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events [Text Block]	SUBSEQUENT EVENTS On January 28, 2019 , the Company and Versum Materials, Inc., a leading specialty materials supplier to the semiconductor industry, announced that they had entered into an Agreement and Plan of Merger, dated as of January 27, 2019, pursuant to which they agreed to combine in a merger of equals. Under the terms of the agreement, Versum will merge with and into Entegris, with Entegris surviving and continuing as the surviving corporation, and Versum stockholders will receive 1.120 shares of Company common stock for each existing Versum share. In connection with the signing of the agreement, the Company entered into a First Amendment to the Credit Agreement, dated as of February 8, 2019, pursuant to which certain covenants were amended in order to permit the assumption of existing indebtedness of Versum upon closing of the merger. On February 8, 2019, the Company also terminated with no cost its $987 million incremental term loan commitment from Morgan Stanley Senior Funding, Inc., which was in place to backstop the credit agreement amendment.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Nature of Operations	Nature of Operations Entegris, Inc. (Entegris or the Company) is a leading global developer, manufacturer and supplier of microcontamination control products, specialty chemicals and advanced materials handling solutions for manufacturing processes in the semiconductor and other high-technology industries.
Principles of Consolidation	Principles of Consolidation The consolidated financial statements include the accounts of the Company and its majority-owned subsidiaries. Intercompany profits, transactions and balances have been eliminated in consolidation.
Use of Estimates	Use of Estimates and Basis of Presentation The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States requires management to make judgments, estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. On an ongoing basis, Entegris evaluates its estimates, including those related to receivables, inventories, property, plant and equipment, intangible assets, accrued liabilities, income taxes and share-based compensation, among others. Actual results could differ from those estimates.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents include cash on hand and highly liquid debt securities with original maturities of three months or less, which are valued at cost and approximates fair value.
Allowance For Doubtful Accounts	Allowance for Doubtful Accounts An allowance for uncollectible trade receivables is estimated based on a combination of write-off history, aging analysis and any specific, known troubled accounts. The Company maintains an allowance for doubtful accounts that management believes is adequate to cover expected losses on trade receivables.
Inventories	Inventories Inventories are stated at the lower of cost and net realizable value. Cost is determined by the first-in, first-out (FIFO) method.
Property, Plant, And Equipment	Property, Plant, and Equipment Property, plant and equipment are carried at cost and are depreciated on the straight-line method over the estimated useful lives of the assets. When assets are retired or disposed of, the cost and related accumulated depreciation are removed from the accounts, and gains or losses are recognized in the same period. Maintenance and repairs are expensed as incurred, while significant additions and improvements are capitalized. Long-lived assets, including property, plant and equipment, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or group of assets may not be recoverable based on estimated future undiscounted cash flows. The amount of impairment, if any, is measured as the difference between the net book value and the estimated fair value of the asset(s).
Fair Value of Financial Instruments	Fair Value of Financial Instruments The carrying value of cash equivalents, accounts receivable, accounts payable, accrued payroll and related benefits, and other accrued liabilities approximates fair value due to the short maturity of those instruments. The fair value of long-term debt, including current maturities, based upon models utilizing market observable (Level 2) inputs and credit risk, was $929 million at December 31, 2018 compared to the carrying amount of long-term debt, including current maturities, of $939 million .
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill represents the excess of acquisition costs over the fair value of the net assets of businesses acquired. Goodwill is not subject to amortization, but is tested for impairment annually at August 31, the Company’s annual testing date, and whenever events or changes in circumstances indicate that impairment may have occurred. The Company compares the carrying value of its reporting units, including goodwill, to their fair value. For reporting units in which the assessment indicates that it is more likely than not that the fair value is more than its carrying value, goodwill is not considered impaired. If the carrying value of the reporting unit exceeds fair value, goodwill is considered impaired. Based on its annual analysis, the Company determined there was no indication of impairment of goodwill and the estimated fair value of each reporting unit substantially exceeded its carrying value. Amortizable intangible assets include, among other items, patented, unpatented and other developed technology and customer-based intangibles, and are amortized using the straight-line method over their respective estimated useful lives. The Company reviews intangible assets, along with other long-lived assets - primarily property, plant and equipment - for impairment if changes in circumstances or the occurrence of events suggest the remaining value may not be recoverable.
Derivative Financial Instruments	Derivative Financial Instruments The Company records derivatives as assets or liabilities on the balance sheet and measures such instruments at fair value. Changes in fair value of derivatives are recorded each period in the Company’s consolidated statements of operations. The Company periodically enters into forward foreign currency contracts to reduce exposures relating to rate changes in certain foreign currencies. Certain exposures to credit losses related to counterparty nonperformance exist. However, the Company does not anticipate nonperformance by the counterparties since they are large, well-established financial institutions. None of these derivatives is accounted for as a hedge transaction. Accordingly, changes in the fair value of forward foreign currency contracts are recorded as other expense (income), net, in the Company’s consolidated statements of operations. The fair values of the Company’s derivative financial instruments are based on prices quoted by financial institutions for these instruments.
Foreign Currency Translation	Foreign Currency Translation Assets and liabilities of certain foreign subsidiaries are translated from foreign currencies into U.S. dollars at period-end exchange rates, and the resulting gains and losses arising from translation of net assets located outside the U.S. are recorded as a cumulative translation adjustment, a component of accumulated other comprehensive loss in the consolidated balance sheets. Income statement amounts are translated at the weighted average exchange rates for the year. Translation adjustments are not adjusted for income taxes, as substantially all translation adjustments relate to permanent investments in non-U.S. subsidiaries. Gains and losses resulting from foreign currency transactions are included in other expense (income), net, in the Company’s consolidated statements of operations.
Revenue Recognition	Revenue Recognition Revenue is measured based on consideration specified in a contract with a customer, and excludes any sales incentives and amounts collected on behalf of third parties. The Company recognizes revenue when it satisfies a performance obligation by transferring control over a product or service to a customer. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, that are collected by the Company from a customer, are excluded from revenue. Shipping and handling costs associated with outbound freight after control over a product has transferred to a customer are accounted for as a fulfillment cost and are included in cost of goods sold.
Shipping and Handling Costs	Shipping and Handling Costs Shipping and handling costs incurred are recorded in cost of sales in the Company’s consolidated statements of operations.
Engineering,Research and Development Expenses	Engineering, Research and Development Expenses Engineering, research and development costs are expensed as incurred.
Share-Based Compensation	Share-based Compensation The Company measures the cost of employee services received in exchange for the award of equity instruments based on the fair value of the award at the date of grant. Compensation expense is recognized using the straight-line attribution method to recognize share-based compensation over the service period of the award, with adjustments recorded for forfeitures as they occur.
Income Taxes	Income Taxes The Company accounts for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Under this method, deferred tax assets and liabilities are determined on the basis of the differences between the financial statements and tax basis of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income tax expense in the period that includes the enactment date. The Company recognizes deferred tax assets to the extent that it believes these assets are more likely than not to be realized. A valuation allowance is recorded to reduce deferred tax assets when it is more likely than not that the Company would not be able to realize all or part of its deferred tax assets. In making such a determination, the Company considers all available positive and negative evidence, including future reversals of existing temporary differences, projected future taxable income, tax-planning strategies, and results of recent operations. If the Company determines that it would be able to realize its deferred tax assets in the future in excess of their net recorded amount, the Company would make an adjustment to the deferred tax asset valuation allowance, which would reduce the provision for income taxes. The Company’s policy for recording interest and penalties associated with audits and unrecognized tax benefits is to record such items as a component of income before taxes. Penalties and interest to be paid or received are recorded in other expense (income), net, in the statement of operations.
Comprehensive Income (Loss)	Comprehensive Income (Loss) Comprehensive income (loss) represents the change in equity resulting from items other than shareholder investments and distributions. The Company’s foreign currency translation adjustments, unrealized gains and losses on available-for-sale investments, and minimum pension liability adjustments are included in accumulated other comprehensive loss. Comprehensive income (loss) and the components of accumulated other comprehensive loss are presented in the accompanying consolidated statements of comprehensive income (loss) and consolidated statements of equity.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Adopted in 2018 In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (AS) No. 2014-09, Revenue from Contracts with Customers. ASU No. 2014-09 supersedes previous revenue recognition requirements and requires entities to recognize revenue when control of the promised goods or services is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The Company adopted the provisions of ASU No. 2014-09 as of January 1, 2018 using the modified retrospective transition method. See note 2 to the Consolidated financial statements for further details. Recent Accounting Pronouncements Yet to be Adopted In February 2016, the FASB established Topic 842, Leases , by issuing Accounting Standards Update (ASU) No. 2016-02, which requires lessees to recognize leases on-balance sheet and disclose key information about leasing arrangements. Topic 842 was subsequently amended by ASU No. 2018-01, Land Easement Practical Expedient for Transition to Topic 842; ASU No. 2018-10, Codification Improvements to Topic 842, Leases; and ASU No. 2018-11, Targeted Improvements. The new standard establishes a right-of-use model (ROU) that requires a lessee to recognize a ROU asset and lease liability on the balance sheet for all leases with a term longer than 12 months. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement. The new standard is effective for the Company on January 1, 2019, with early adoption permitted. A modified retrospective transition approach is required, applying the new standard to all leases existing at the date of initial application. We expect to adopt the new standard on January 1, 2019 and use the effective date as the date of initial application. Consequently, the Company will not recast its comparative period financial statements or provide the disclosures required by the new standard for the comparative periods. The new standard provides a number of optional practical expedients in transition. The Company expects to elect the ‘package of practical expedients’, which permits the Company not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. The Company also expects to elect the practical expedient pertaining to land easements, which allows the Company not to evaluate all existing land easements in connection with the adoption of the new lease requirements to assess whether they meet the definition of a lease. The Company does not expect to elect the use-of-hindsight practical expedient and therefore will not reassess the lease terms for purposes of calculation of the lease liabilities and right-of-use assets at the initial adoption. The Company expects that this standard will have a material effect on the Company’s consolidated balance sheets. On adoption, the Company currently expects to recognize additional operating liabilities and right-of-use assets of approximately $40 to $60 million. The Company does not expect this standard to have a material impact on our annual consolidated statement of operations and/or cash flows. While the Company continues to assess all of the effects of adoption, the Company currently believes the most significant effects relate to the recognition of new right-of-use assets and lease liabilities on the balance sheet for real estate operating leases and the Company expects to provide significant new disclosures about the leasing activities. The new standard also provides practical expedients for an entity’s ongoing accounting. The Company currently expects to elect the short-term lease recognition exemption for all leases that qualify. This means, for those leases that qualify, the Company will not recognize right-of-use assets or lease liabilities, and this includes not recognizing right-of-use assets or lease liabilities for existing short-term leases of those assets in transition. The Company also currently expects to elect the practical expedient to not separate lease and non-lease components for all leases other than leases of real estate, and this includes not separating lease and non-lease components for all leases other than leases of real estate in transition.

Revenues Revenues (Tables)

Revenues Revenues (Tables)	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue, Initial Application Period Cumulative Effect Transition	The Company adopted ASU No. 2014-09 using the modified retrospective method, recognizing the cumulative effect of application as an adjustment to the opening balance of equity at January 1, 2018. Therefore, prior year information has not been adjusted and continues to be reported under previous applicable guidance. The details of the impact of the changes made to the Company’s balance sheet date as of January 1, 2018 are reflected in the following table. ( In thousands ) Increase (decrease) Trade accounts and note receivable $ 765 Inventory (223 ) Other accrued liabilities 1,276 Deferred tax liabilities and other noncurrent tax liabilities (144 ) Retained earnings (590 )
Contract with Customer, Asset and Liability	The following table provides information about contract liabilities from contracts with customers. The contract liabilities are included in other accrued liabilities balance in the consolidated balance sheet. (In thousands) December 31, 2018 December 31, 2017 Contract liabilities - current $ 15,364 $ 3,210
Significant changes for contract balances	Significant changes in the contract liabilities balances during the period are as follows: (In thousands) 2018 Revenue recognized that was included in the contract liability balance at the beginning of the period $ (3,210 ) Increases due to cash received, excluding amounts recognized as revenue during the period 5,918 Business combination 9,446

Acquisition (Tables)

Acquisition (Tables)	12 Months Ended
	Dec. 31, 2018
SPG acquisition member
Business Acquisition
Schedule of Business Acquisitions, by Acquisition	The following table summarizes the provisional allocation of the purchase price to the fair values assigned to the assets acquired and liabilities assumed at the date of the SPG acquisition: (In thousands): As of June 30, 2018 As of December 31, 2018 Trade accounts and notes receivable, net $ 15,805 $ 19,173 Inventories, net 46,073 42,758 Other current assets 424 1,322 Property, plant and equipment, net 7,345 6,653 Identifiable intangible assets 178,220 150,430 Deferred tax asset — 831 Other noncurrent assets 398 12 Current liabilities (26,196 ) (26,473 ) Deferred tax liabilities (42,110 ) (35,533 ) Other noncurrent liabilities (1,006 ) (1,412 ) Net assets acquired 178,953 157,761 Goodwill 162,251 183,729 Total purchase price, net of cash acquired $ 341,204 $ 341,490
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]	The Company recognized the following finite-lived intangible assets as part of the acquisition of SPG: (In thousands) Amount Weighted average life in years Developed technology $ 20,070 8.0 Trademarks and trade names 6,670 12.0 Customer relationships 107,790 12.0 Other 15,900 0.9 $ 150,430 10.0
Business Acquisition, Pro Forma Information	The following unaudited pro forma financial information presents the combined results of operations of the Company as if the acquisition of SPG had occurred as of the beginning of the years presented. The unaudited pro forma financial information is not necessarily indicative of what the Company’s 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. (In thousands, except per share data) (Unaudited) Year ended December 31, 2018 Year ended December 31, 2017 Net sales $ 1,604,194 $ 1,437,357 Net income 273,625 67,009 Per share amounts: Net income per common share - basic $ 1.94 $ 0.47 Net income per common share - diluted $ 1.92 $ 0.47
PSS acquisition
Business Acquisition
Schedule of Business Acquisitions, by Acquisition	The following table summarizes the final allocation of the purchase price to the fair values assigned to the assets acquired and liabilities assumed at the date of acquisition: (In thousands): As of March 31, 2018 As of December 31, 2018 Trade accounts and notes receivable, net $ 3,616 $ 3,898 Inventories, net 1,889 1,827 Other current assets 14 23 Property, plant and equipment, net — 103 Identifiable intangible assets 20,000 25,600 Other noncurrent assets 21 3 Accounts payables (438 ) (294 ) Other accrued liabilities (2,799 ) (2,667 ) Net assets acquired 22,303 28,493 Goodwill 15,353 8,804 Total purchase price $ 37,656 $ 37,297
W.L. Gore
Business Acquisition
Schedule of Business Acquisitions, by Acquisition	The following table summarizes the final allocation of the purchase price to the fair values assigned to the assets and liabilities assumed at the date of acquisition: (In thousands) Amount Other current assets $ 726 Property, plant and equipment, net 2,447 Identifiable intangible assets 8,820 Net assets acquired 11,993 Goodwill 8,007 Total purchase price $ 20,000

Trade Accounts and Notes Rece_2

Trade Accounts and Notes Receivable (Tables)	12 Months Ended
	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Trade Accounts and Notes Receivable	Trade accounts and notes receivable from customers at December 31, 2018 and 2017 consist of the following: (In thousands) 2018 2017 Accounts receivable $ 218,098 $ 179,194 Notes receivable 4,850 5,100 Total trade accounts and notes receivable 222,948 184,294 Less allowance for doubtful accounts 893 860 Trade accounts and notes receivable, net $ 222,055 $ 183,434

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2018
Inventory Disclosure [Abstract]
Inventories	Inventories at December 31, 2018 and 2017 consist of the following: (In thousands) 2018 2017 Raw materials $ 100,770 $ 58,226 Work-in-process 31,412 16,193 Finished goods (a) 135,958 123,670 Inventories, net $ 268,140 $ 198,089 (a) Includes consignment inventories held by customers for $12.5 million and $15.6 million at December 31, 2018 and 2017 , respectively.

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, plant, and equipment at December 31, 2018 and 2017 consists of the following: (In thousands) 2018 2017 Estimated useful lives in years Land $ 21,913 $ 16,795 Buildings and improvements 185,175 174,615 5-35 Manufacturing equipment 298,529 274,723 5-10 Canisters and cylinders 90,790 77,325 3-12 Molds 72,089 80,198 3-5 Office furniture and equipment 142,818 121,345 3-8 Construction in progress 69,437 42,288 Total property, plant and equipment 880,751 787,289 Less accumulated depreciation 461,222 427,766 Property, plant and equipment, net $ 419,529 $ 359,523
Depreciation Expense	The table below sets forth the depreciation expense for the years ended December 31, 2018 , 2017 and 2016 : (In thousands) 2018 2017 2016 Depreciation expense $ 65,116 $ 58,208 $ 55,623

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	Goodwill activity for each of the Company’s reportable segments that carry goodwill, Specialty Chemicals and Engineered Materials (SCEM ), Microcontamination Control (MC) and Advanced Materials Handling (AMH), for the years ended December 31, 2018 and 2017 is shown below: (In thousands) SCEM MC AMH Total December 31, 2016 $ 297,858 $ — $ 47,411 $ 345,269 Purchase accounting adjustments — 8,007 — 8,007 Other, including foreign currency translation 6,412 — — 6,412 December 31, 2017 304,270 8,007 47,411 359,688 Addition due to acquisitions — 183,729 9,660 193,389 Other, including foreign currency translation (2,847 ) (28 ) — (2,875 ) December 31, 2018 $ 301,423 $ 191,708 $ 57,071 $ 550,202
Schedule of Acquired Finite-Lived Intangible Assets by Major Class	Identifiable intangible assets at December 31, 2018 and 2017 consist of the following: 2018 (In thousands) Gross carrying Amount Accumulated amortization Net carrying value Weighted average life in years Developed technology 248,776 176,421 72,355 7.0 Trademarks and trade names 25,643 14,749 10,894 10.5 Customer relationships 328,050 133,068 194,982 10.8 Other 36,306 18,850 17,456 4.1 $ 638,775 $ 343,088 $ 295,687 8.9 2017 (In thousands) Gross carrying amount Accumulated amortization Net carrying value Weighted average life in years Developed technology 206,224 149,215 57,009 6.6 Trademarks and trade names 16,807 13,712 3,095 9.9 Customer relationships 220,806 110,281 110,525 10.3 Other 20,032 8,231 11,801 6.7 $ 463,869 $ 281,439 $ 182,430 8.5
Amortization of Intangibles	The table below sets forth the amortization expense for the years ended December 31, 2018 , 2017 , and 2016 : (In thousands) 2018 2017 2016 Amortization expense $ 62,152 $ 44,023 $ 44,263
Estimated Future Amortization Expense	(In thousands) 2019 2020 2021 2022 2023 Thereafter Total Future amortization expense $ 63,444 $ 42,229 $ 35,771 $ 35,189 $ 34,500 $ 84,554 $ 295,687

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Schedule of Debt	Long-term debt at December 31, 2018 and 2017 consists of the following: (In thousands) December 31, 2018 December 31, 2017 Senior secured term loan facility due 2021 $ — $ 133,850 Senior secured term loan facility due 2025 400,000 — Senior unsecured notes due 2026 550,000 550,000 950,000 683,850 Unamortized discount and debt issuance costs 11,137 9,470 Total long-term debt 938,863 674,380 Less current maturities of long-term debt 4,000 100,000 Long-term debt less current maturities $ 934,863 $ 574,380
Schedule of Maturities of Long-term Debt	Annual maturities of long-term debt, excluding unamortized discount and issuance costs, due as of December 31, 2018 are as follows: (In thousands) 2019 2020 2021 2022 2023 Thereafter Total Contractual debt obligation maturities* $ 4,000 4,000 4,000 4,000 4,000 930,000 $ 950,000

Lease Commitments (Tables)

Lease Commitments (Tables)	12 Months Ended
	Dec. 31, 2018
Leases [Abstract]
Future Minimum Lease Payments	As of December 31, 2018 , the Company was obligated under noncancellable operating lease agreements for certain sales offices and manufacturing facilities, manufacturing equipment, vehicles, information technology equipment and warehouse space. Future minimum lease payments for noncancellable operating leases with initial or remaining terms in excess of one year as of December 31, 2018 , are as follows: (In thousands) 2019 2020 2021 2022 2023 Thereafter Total Future minimum lease payments $ 11,360 8,906 6,836 5,431 5,208 27,153 $ 64,894

Asset Retirement Obligations (T

Asset Retirement Obligations (Tables)	12 Months Ended
	Dec. 31, 2018
Asset Retirement Obligation [Abstract]
Schedule of Asset Retirement Obligations	Changes in the carrying amounts of the Company’s AROs for the years ended December 31, 2018 and 2017 are shown below: (In thousands) 2018 2017 Balance at beginning of year $ 12,167 $ 11,529 Liabilities settled (758 ) (577 ) Liabilities incurred 884 412 Accretion expense 510 215 Revision of estimate (260 ) 588 Balance at end of year $ 12,543 $ 12,167

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income (Loss) Before Income Taxes	Income before income taxes for the years ended December 31, 2018 , 2017 and 2016 was derived from the following sources: (In thousands) 2018 2017 2016 Domestic $ 61,545 $ 13,363 $ (7,328 ) Foreign 192,887 171,368 127,327 Income before income tax expense $ 254,432 $ 184,731 $ 119,999
Components of Income Tax Expense	Income tax expense for the years ended December 31, 2018 , 2017 and 2016 is summarized as follows: (In thousands) 2018 2017 2016 Current: Federal $ (14,775 ) $ 60,529 $ 7,759 State 1,605 808 (10 ) Foreign 38,723 36,700 31,387 25,553 98,037 39,136 Deferred (net of valuation allowance): Federal (13,399 ) 249 (8,183 ) State (370 ) (891 ) 250 Foreign 1,893 2,270 (8,351 ) (11,876 ) 1,628 (16,284 ) Income tax expense $ 13,677 $ 99,665 $ 22,852
Reconciliation of Income Tax Expense With Expected Amounts Based Upon Statutory Federal Tax Rates	Income tax (benefit) expense differs from the expected amounts based upon the statutory federal tax rates for the years ended December 31, 2018 , 2017 and 2016 as follows: (In thousands) 2018 2017 2016 Expected federal income tax at statutory rate $ 53,431 $ 64,656 $ 42,000 State income taxes before valuation allowance, net of federal tax effect 605 (1,376 ) (769 ) Effect of foreign source income 2,359 (27,581 ) (22,242 ) Tax contingencies 468 2,816 1,103 Valuation allowance 527 3,195 1,713 U.S. federal research credit (2,263 ) (4,881 ) (1,676 ) Equity compensation (3,826 ) (2,321 ) 815 Transition tax 89 72,993 — Remeasurement of deferred taxes 619 (10,248 ) — Incremental taxes on unremitted foreign earnings release — 3,968 — Foreign derived intangible income (4,846 ) — — Legal entity restructuring foreign tax credit (25,080 ) — — Legal entity restructuring dividends received deduction (9,398 ) — — Other items, net 992 (1,556 ) 1,908 Income tax expense $ 13,677 $ 99,665 $ 22,852
Deferred Tax Assets And Deferred Tax Liabilities	The significant components of the Company’s deferred tax assets and deferred tax liabilities at December 31, 2018 and 2017 are as follows: (In thousands) 2018 2017 Deferred tax assets attributable to: Accounts receivable $ 247 $ 32 Inventory 4,085 4,132 Accruals not currently deductible for tax purposes 8,694 8,641 Net operating loss and credit carryforwards 15,878 15,184 Capital loss carryforward 2,450 2,391 Equity compensation 3,054 3,658 Asset impairments 452 452 Other, net 3,488 2,549 Gross deferred tax assets 38,348 37,039 Valuation allowance (18,079 ) (17,494 ) Total deferred tax assets 20,269 19,545 Deferred tax liabilities attributable to: Purchased intangible assets (50,128 ) (28,956 ) Depreciation (3,874 ) (2,512 ) Total deferred tax liabilities (54,002 ) (31,468 ) Net deferred tax liabilities $ (33,733 ) $ (11,923 )
Reconciliations of Total Amount of Gross Unrecognized Tax Benefits	Reconciliations of the beginning and ending balances of the total amounts of gross unrecognized tax benefits for the years ended December 31, 2018 and 2017 are as follows: (In thousands) 2018 2017 Gross unrecognized tax benefits at beginning of year $ 12,561 $ 8,293 Increase in tax positions from prior years 61 298 Decrease in tax positions from prior years (234 ) — Increases in tax positions for current year 2,970 4,724 Settlement of tax positions for current year (2,577 ) — Lapse in statute of limitations (486 ) (754 ) Gross unrecognized tax benefits at end of year $ 12,295 $ 12,561

Equity (Tables)

Equity (Tables)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Summary of Option Activity	Stock option activity for the 2010 Stock Plan and predecessor plans for the years ended December 31, 2018 , 2017 and 2016 is summarized as follows: 2018 2017 2016 (Shares in thousands) Number of shares Weighted average exercise price Number of shares Weighted average exercise price Number of shares Weighted average exercise price Options outstanding, beginning of year 1,869 $ 13.46 1,907 $ 11.54 2,139 $ 10.57 Granted 296 31.10 335 21.60 549 12.20 Exercised (727 ) 10.89 (359 ) 10.89 (633 ) 8.66 Expired or forfeited (28 ) 26.41 (14 ) 12.78 (148 ) 12.32 Options outstanding, end of year 1,410 $ 18.22 1,869 $ 13.46 1,907 $ 11.54 Options exercisable, end of year 562 $ 13.68 872 $ 11.11 776 $ 10.65
Summary of Options Outstanding	Options outstanding for the Company’s stock plans at December 31, 2018 are summarized as follows: (Shares in thousands) Options outstanding Options exercisable Range of exercise prices Number outstanding Weighted average remaining life in years Weighted- average exercise price Number exercisable Weighted average exercise $9.88 to $11.71 107 1.8 years $ 11.09 107 $ 11.09 $12.20 to $12.20 438 4.1 years 12.20 190 12.20 $13.49 to $13.49 271 3.1 years 13.49 189 13.49 $21.60 to $21.60 313 5.1 years 21.60 76 21.60 $31.10 to $31.10 281 6.1 years 31.10 — — 1,410 4.4 years 18.22 562 13.68
Weighted Average Assumptions Used In Valuation And Resulting Weighted Average Fair Value Per Option Granted	The fair value of each stock option grant was estimated at the date of grant using a Black-Scholes option pricing model. The following table presents the weighted-average assumptions used in the valuation and the resulting weighted-average fair value per option granted for the years ended December 31, 2018 , 2017 and 2016 : Employee stock options: 2018 2017 2016 Volatility 28.7 % 26.9 % 27.6 % Risk-free interest rate 2.4 % 1.7 % 1.1 % Dividend yield 0.9 % — % — % Expected life (years) 3.9 4.1 4.0 Weighted average fair value per option $ 7.35 $ 5.25 $ 2.85
Summary of Restricted Stock Activity	Restricted stock units are awards of common stock made under the 2010 Stock Plan that are subject to a risk of forfeiture if the awardee terminates employment with the Company prior to the lapse of the restrictions. The value of such restricted stock units is determined using the market price on the grant date. Compensation expense for restricted stock units is generally recognized using the straight-line single-option method. A summary of the Company’s restricted stock unit activity for the years ended December 31, 2018 , 2017 and 2016 is presented in the following table: 2018 2017 2016 (Shares in thousands) Number of shares Weighted average grant date fair value Number of shares Weighted average grant date fair value Number of shares Weighted average grant date fair value Unvested, beginning of year 1,857 $ 15.86 2,164 $ 12.49 1,882 $ 12.25 Granted 509 31.40 659 22.14 1,249 12.42 Vested (732 ) 15.07 (801 ) 12.22 (711 ) 11.74 Forfeited (115 ) 18.58 (165 ) 14.48 (256 ) 12.44 Unvested, end of year 1,519 21.24 1,857 15.86 2,164 12.49
Summary of Allocation of Share Based Compensation Expense	The following table summarizes the allocation of share-based compensation expense related to employee stock options, restricted stock awards and grants under the employee stock purchase plan for the years ended December 31, 2018 , 2017 and 2016 : (In thousands) 2018 2017 2016 Cost of sales $ 1,009 $ 1,031 $ 1,579 Engineering, research and development expenses 1,689 1,457 1,124 Selling, general and administrative expenses 14,414 12,818 10,733 Share-based compensation expense 17,112 15,306 13,436 Tax benefit 3,421 4,978 4,153 Share-based compensation expense, net of tax $ 13,691 $ 10,328 $ 9,283

Benefit Plans (Tables)

Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2018
Defined Benefit Plan [Abstract]
Estimated Funded Status	The tables below set forth the Company’s estimated funded status as of December 31, 2018 and 2017 : (In thousands) 2018 2017 Change in benefit obligation: Benefit obligation at beginning of year $ 7,682 $ 7,073 Service cost 50 38 Interest cost 62 46 Actuarial (gain) loss 75 302 Benefits paid (560 ) (222 ) Other 11 7 Foreign exchange impact (12 ) 438 Benefit obligation at end of year 7,308 7,682 Change in plan assets: Fair value of plan assets at beginning of year 908 743 Return on plan assets 31 5 Employer contributions 110 88 Benefits paid (185 ) — Foreign exchange impact (29 ) 72 Fair value of plan assets at end of year 835 908 Funded status: Plan assets less than benefit obligation - Net amount recognized $ (6,473 ) $ (6,774 )
Amounts Recognized in Consolidated Balance Sheet	Amounts recognized in the consolidated balance sheets consist of: (In thousands) 2018 2017 Noncurrent liability $ (6,473 ) $ (6,774 ) Accumulated other comprehensive loss, net of taxes 860 919
Amounts Recognized in Accumulated Other Comprehensive Loss Net of Tax	Amounts recognized in accumulated other comprehensive loss, net of tax consist of: (In thousands) 2018 2017 Net actuarial loss $ 514 $ 490 Prior service cost 616 705 Gross amount recognized 1,130 1,195 Deferred income taxes (270 ) (276 ) Net amount recognized $ 860 $ 919
Pension Plans Accumulated Benefit Obligation in Excess of Plan Assets	Information for pension plans with an accumulated benefit obligation in excess of plan assets: (In thousands) 2018 2017 Projected benefit obligation $ 6,473 $ 6,774 Accumulated benefit obligation 6,235 6,497 Fair value of plan assets 835 908
Components of Net Periodic Benefit Cost	The components of the net periodic benefit cost for the years ended December 31, 2018 , 2017 and 2016 were as follows: (In thousands) 2018 2017 2016 Pension benefits: Service cost $ 50 $ 38 $ 66 Interest cost 62 46 91 Expected return on plan assets (18 ) (11 ) (10 ) Amortization of prior service cost 69 69 65 Amortization of net transition obligation — 22 — Amortization of plan loss 20 — — Recognized actuarial net loss — — 17 Net periodic pension benefit cost $ 183 $ 164 $ 229
Estimated Amount Amortized from Accumulated Other Comprehensive Income Into Net Periodic Benefit Cost	The estimated amount that will be amortized from accumulated other comprehensive income into net periodic benefit cost in 2019 is as follows: (In thousands) Prior service cost $ 68 Net actuarial loss 17 $ 85
Assumptions Used in Determining Benefit Obligation and Net Periodic Benefit Cost for Pension Plans	Assumptions used in determining the benefit obligation and net periodic benefit cost for the Company’s pension plans for the years ended December 31, 2018 , 2017 and 2016 are presented in the following table as weighted-averages: 2018 2017 2016 Benefit obligations: Discount rate 0.76 % 0.82 % 0.63 % Rate of compensation increase 3.08 % 3.05 % 2.90 % Net periodic benefit cost: Discount rate 1.66 % 1.45 % 1.70 % Rate of compensation increase 3.18 % 3.00 % 3.43 % Expected return on plan assets 1.89 % 1.80 % 1.43 %
Fair Value Measurements of Pension Plan Assets	The fair value measurements of the Company’s pension plan assets at December 31, 2018 , by asset category are as follows: (In thousands) Quoted prices in active markets for identical assets Significant observable inputs Significant unobservable inputs Asset category Total (Level 1) (Level 2) (Level 3) Taiwan plan assets (a) $ 669 $ 669 — — Germany plan assets (b) $ 166 $ 166 — — $ 835 $ 835 — — (a) This category includes investments in the government of Taiwan’s pension fund. The government of Taiwan is responsible for the strategy and allocation of the investment contributions. (b) This category includes investments in an insurer’s balanced asset fund. The insurer is responsible for the strategy and allocation of the investment contributions. The Company selects a pre-packaged portfolio pooled investment fund that is conservative. The majority of the funs are invested broadly in German mortgage bonds, construction loans and government bonds with good credit rating. The fair value measurements of the Company’s pension plan assets at December 31, 2017 , by asset category are as follows: (In thousands) Quoted prices in active markets for identical assets Significant observable inputs Significant unobservable inputs Asset category Total (Level 1) (Level 2) (Level 3) Taiwan plan assets (a) $ 830 $ 830 — — Germany plan assets (b) $ 78 $ 78 — — $ 908 $ 908 — —
Expected Contribution And Benefit Payments	The Company expects to make the following contributions and benefit payments: (In thousands) Contributions Payments 2019 $ 93 $ 36 2020 — 33 2021 — 217 2022 — 201 2023 — 251 Years 2024-2028 — 2,197

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Financial Assets Measured At Fair Value On Recurring Basis	The following table presents the Company’s financial assets and liabilities that are measured at fair value on a recurring basis at December 31, 2018 and 2017 . December 31, 2018 December 31, 2017 (In thousands) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets: Other current assets Foreign currency contracts (a) $ — $ — $ — $ — $ — $ 36 $ — $ 36 Total assets measured and recorded at fair value $ — $ — $ — $ — $ — $ 36 $ — $ 36 Liabilities: Other accrued liabilities Foreign currency contracts (a) $ — $ 589 $ — $ 589 $ — $ — $ — $ — Total liabilities measured and recorded at fair value $ — $ 589 $ — $ 589 $ — $ — $ — $ —
Schedule of Derivative Instruments	December 31, 2018 and 2017 consolidated balance sheets to the net fair value that could have been reported in the respective consolidated balance sheet is as follows: December 31, 2018 December 31, 2017 (In thousands) Gross Gross Net amount Gross Gross Net amount of assets in the Foreign exchange forward contracts $ 589 $ — $ 589 $ 36 $ — $ 36
Derivative Instruments, Gain (Loss)	Losses associated with derivatives are recorded in other expense (income), net, in the consolidated statements of operations. Losses associated with derivative instruments not designated as hedging instruments for the years ended December 31, 2018 , 2017 and 2016 were as follows: (In thousands) 2018 2017 2016 Losses on foreign currency forward contracts $ (1,287 ) $ (2,209 ) $ (1,647 )

Earning Per Share (EPS) (Tables

Earning Per Share (EPS) (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Reconcilation of Share Amount Used in Computaion of Basic and Diluted Earnings Per Share	Basic EPS is computed by dividing net income by the weighted average number of shares of common stock outstanding during each period. The following table presents a reconciliation of the share amounts used in the computation of basic and diluted earnings per share: (In thousands) 2018 2017 2016 Basic earnings per share—Weighted common shares outstanding 141,026 141,553 141,093 Weighted common shares assumed upon exercise of options and vesting of restricted stock units 1,584 1,965 957 Diluted earnings per share—Weighted common shares outstanding 142,610 143,518 142,050
Shares Excluded Underlying Stock Based Awards from Calculations of Diluted EPS	The Company excluded the following shares underlying stock-based awards from the calculations of diluted EPS because their inclusion would have been anti-dilutive for the years ended December 31, 2018 , 2017 and 2016 : (In thousands) 2018 2017 2016 Shares excluded from calculations of diluted EPS 267 303 434

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Summary of Financial Information for Reportable Segments	Summarized financial information for the Company’s reportable segments is shown in the following tables. (In thousands) 2018 2017 2016 Net sales: SCEM $ 530,241 $ 485,470 $ 428,328 MC 552,844 436,225 362,658 AMH 467,412 420,837 384,284 Total net sales $ 1,550,497 $ 1,342,532 $ 1,175,270 ( In thousands ) 2018 2017 2016 Segment profit: SCEM $ 129,754 $ 111,802 $ 77,328 MC 173,964 141,413 93,911 AMH 82,541 59,838 56,282 Total segment profit $ 386,259 $ 313,053 $ 227,521 ( In thousands ) 2018 2017 2016 Total assets: SCEM $ 757,381 $ 749,379 $ 766,126 MC 680,080 251,216 200,399 AMH 359,991 278,079 267,085 Corporate 520,189 697,498 465,922 Total assets $ 2,317,641 $ 1,976,172 $ 1,699,532 (In thousands) 2018 2017 2016 Depreciation and amortization: SCEM $ 70,329 $ 66,514 $ 64,959 MC 33,590 13,744 9,995 AMH 22,805 21,003 23,697 Corporate 544 970 1,235 Total depreciation and amortization $ 127,268 $ 102,231 $ 99,886 (In thousands) 2018 2017 2016 Capital expenditures: SCEM $ 44,337 $ 44,350 $ 23,138 MC 38,331 27,178 9,880 AMH 26,545 18,378 31,634 Corporate 940 3,691 608 Total capital expenditures $ 110,153 $ 93,597 $ 65,260
Reconciliation of Total Segment Profit to Operating Income	The following table reconciles total segment profit to income before income taxes and equity in net loss of affiliate: (In thousands) 2018 2017 2016 Total segment profit $ 386,259 $ 313,053 $ 227,521 Less: Amortization of intangibles 62,152 44,023 44,263 Unallocated general and administrative expenses 31,418 27,213 27,722 Operating income 292,689 241,817 155,536 Interest expense 34,094 32,343 36,846 Interest income (3,839 ) (715 ) (318 ) Other expense (income), net 8,002 25,458 (991 ) Income before income tax expense $ 254,432 $ 184,731 $ 119,999
Summary of Total Net Sales to External Customers	based on the ship to location of the customer for the years ended December 31, 2018 , 2017 and 2016 : (In thousands) 2018 SCEM MC AMH Total Taiwan $ 104,707 $ 118,208 $ 66,948 $ 289,863 United States 133,834 94,427 118,771 347,032 South Korea 82,890 74,623 84,883 242,396 Japan 52,731 110,997 47,027 210,755 China 68,365 84,652 51,368 204,385 Europe 32,088 40,635 65,352 138,075 Southeast Asia 55,626 29,302 33,063 117,991 $ 530,241 $ 552,844 $ 467,412 $ 1,550,497 2017 (In thousands) SCEM MC AMH Total Taiwan $ 113,279 $ 109,815 $ 66,620 $ 289,714 United States 117,602 70,834 97,903 286,339 South Korea 74,773 65,677 76,418 216,868 Japan 41,164 89,638 38,678 169,480 China 64,796 45,382 38,712 148,890 Europe 30,472 30,479 59,530 120,481 Southeast Asia 43,384 24,400 42,976 110,760 $ 485,470 $ 436,225 $ 420,837 $ 1,342,532 (In thousands) 2016 SCEM MC AMH Total Taiwan $ 107,806 $ 109,509 $ 73,994 $ 291,309 United States 98,436 57,594 97,838 253,868 South Korea 57,538 36,477 51,646 145,661 Japan 31,232 86,927 37,862 156,021 China 58,282 27,544 32,609 118,435 Europe 29,890 24,866 51,023 105,779 Southeast Asia 45,144 19,741 39,312 104,197 $ 428,328 $ 362,658 $ 384,284 $ 1,175,270
Summary of Property, Plant and Equipment Attributed to Significant Countries	The following table summarizes property, plant and equipment, net, attributed to significant countries for the years ended December 31, 2018 , 2017 and 2016 : (In thousands) 2018 2017 2016 Property, plant and equipment: United States $ 289,049 $ 257,584 $ 226,394 South Korea 41,698 39,562 33,441 Japan 34,276 23,648 25,248 Malaysia 31,138 19,212 19,180 Taiwan 18,804 16,073 14,151 Other 4,564 3,444 3,148 $ 419,529 $ 359,523 $ 321,562

Quarterly Information-Unaudit_2

Quarterly Information-Unaudited (Tables)	12 Months Ended
	Dec. 31, 2018
Selected Quarterly Financial Information [Abstract]
Quartely Information	Fiscal quarter ended (In thousands, except per share data) March 31, 2018 June 30, 2018 September 29, 2018 December 31, 2018 Net sales $ 367,199 $ 383,059 $ 398,597 $ 401,642 Gross profit 175,997 182,378 181,716 179,740 Net income 57,562 54,349 48,060 80,784 Basic net income per common share 0.41 0.38 0.34 0.58 Diluted net income per common share 0.40 0.38 0.34 0.57 Fiscal quarter ended (In thousands, except per share data) April 1, 2017 July 1, 2017 September 30, 2017 December 31, 2017 Net sales $ 317,377 $ 329,002 $ 345,591 $ 350,562 Gross profit 139,596 150,303 155,407 163,679 Net income (loss) 32,514 39,991 40,902 (28,341 ) Basic net income (loss) per common share 0.23 0.28 0.29 (0.20 ) Diluted net income (loss) per common share 0.23 0.28 0.28 (0.20 )

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Long-term Debt, Fair Value	$ 929,000
Total long-term debt	$ 938,863	$ 674,380

Summary of Significant Accoun_4

Summary of Significant Accounting Policies Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)
Minimum
New Accounting Pronouncements or Change in Accounting Principle
Approximate ROU Asset and Liability for ASU 2016-02	$ 40,000
Maximum
New Accounting Pronouncements or Change in Accounting Principle
Approximate ROU Asset and Liability for ASU 2016-02	$ 60,000

Revenues Revenues - ASU 2014-09

Revenues Revenues - ASU 2014-09 Inititial Adoption (Details) $ in Thousands	Jan. 01, 2018USD ($)
Trade accounts and notes receivable
New Accounting Pronouncements or Change in Accounting Principle
New accounting pronouncement, effect of adoption ASU 2014-09	$ 765
Inventory
New Accounting Pronouncements or Change in Accounting Principle
New accounting pronouncement, effect of adoption ASU 2014-09	(223)
Other accrued liabilities
New Accounting Pronouncements or Change in Accounting Principle
New accounting pronouncement, effect of adoption ASU 2014-09	1,276
Deferred tax liabilities and other noncurrent tax liabilities
New Accounting Pronouncements or Change in Accounting Principle
New accounting pronouncement, effect of adoption ASU 2014-09	(144)
Retained earnings
New Accounting Pronouncements or Change in Accounting Principle
New accounting pronouncement, effect of adoption ASU 2014-09	$ (590)

Revenues Revenues - Contract Li

Revenues Revenues - Contract Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Revenue from Contract with Customer [Abstract]
Contract liabilities - current	$ 15,364	$ 3,210

Revenues Revenues - Revenue rec

Revenues Revenues - Revenue recognized (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)
Revenue from Contract with Customer [Abstract]
Revenue recognized that was included in the contract liability balance at the beginning of the period	$ (3,210)
Increases due to cash received, excluding amounts recognized as revenue during the period	5,918
Business combination	$ 9,446

Acquisition Acquisition - SPG P

Acquisition Acquisition - SPG Purchase Additional Information (Details) - USD ($) $ in Thousands	Jun. 25, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2018
Business Acquisition
Goodwill		$ 550,202	$ 359,688	$ 345,269
Payments to Acquire Businesses, Net of Cash Acquired		380,694	$ 20,000	$ 0
SPG acquisition member
Business Acquisition
Goodwill	$ 183,729	183,729			$ 162,251
Inventories, net	$ 42,758	42,758			46,073
Business Acquisition, Date of Acquisition Agreement	Jun. 25, 2018
Payments to Acquire Businesses, Gross	$ 352,700
Payments to Acquire Businesses, Net of Cash Acquired	341,500
Business Acquisition Transaction Costs		4,800
Inventory fair value step-up	8,900
Amortization of Inventory Step-up		6,900
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual		62,200
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual		(2,600)
Property, plant and equipment, net	6,653	$ 6,653			$ 7,345
Business Acquisition, Goodwill, Expected Tax Deductible Amount	$ 0

Acquisition - SPG Purchase Pric

Acquisition - SPG Purchase Price Allocation (Details) - USD ($) $ in Thousands	Jun. 25, 2018	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition
Goodwill		$ 550,202		$ 359,688	$ 345,269
SPG acquisition member
Business Acquisition
Trade accounts and notes receivable, net		19,173	$ 15,805
Inventories, net	$ 42,758	42,758	46,073
Other current assets		1,322	424
Property, plant and equipment, net	6,653	6,653	7,345
Identifiable intangible assets	150,430	150,430	178,220
Deferred tax asset		831	0
Other noncurrent assets		12	398
Current liabilities		(26,473)	(26,196)
Deferred tax liabilities		(35,533)	(42,110)
Other noncurrent liabilities		(1,412)	(1,006)
Net Assets Acquired		157,761	178,953
Goodwill	$ 183,729	183,729	162,251
Total Purchase Price		$ 341,490	$ 341,204
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years
Developed Technology | SPG acquisition member
Business Acquisition
Identifiable intangible assets	$ 20,070
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	8 years
Trademarks and Trade names | SPG acquisition member
Business Acquisition
Identifiable intangible assets	$ 6,670
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	12 years
Customer Relationships | SPG acquisition member
Business Acquisition
Identifiable intangible assets	$ 107,790
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	12 years
Other | SPG acquisition member
Business Acquisition
Identifiable intangible assets	$ 15,900
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	11 months

Acquisition Acquisition - SPG_2

Acquisition Acquisition - SPG Pro Forma (Details) - SPG acquisition member - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition
Business Acquisition, Pro Forma Revenue	$ 1,604,194	$ 1,437,357
Business Acquisition, Pro Forma Net Income (Loss)	$ 273,625	$ 67,009
Business Acquisition, Pro Forma Earnings Per Share, Basic	$ 1.94	$ 0.47
Business Acquisition, Pro Forma Earnings Per Share, Diluted	$ 1.92	$ 0.47

Acquisition Acquisition - PSS P

Acquisition Acquisition - PSS Purchase Price Allocation (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition
Goodwill	$ 550,202		$ 359,688	$ 345,269
PSS acquisition
Business Acquisition
Trade accounts and notes receivable, net	3,898	$ 3,616
Inventories, net	1,827	1,889
Other current assets	23	14
Property, plant and equipment, net	103	0
Identifiable intangible assets	25,600	20,000
Other noncurrent assets	3	21
Accounts payables	294	438
Current liabilities	(2,667)	(2,799)
Net Assets Acquired	28,493	22,303
Goodwill	8,804	15,353
Total Purchase Price	$ 37,297	$ 37,656

Acquisition Acquisitons - PSS P

Acquisition Acquisitons - PSS Purchase Additional Information (Details) - USD ($) $ in Thousands	Jan. 22, 2018	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition
Goodwill		$ 550,202		$ 359,688	$ 345,269
PSS acquisition
Business Acquisition
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	9 years 5 months
Business Acquisition, Date of Acquisition Agreement	Jan. 22, 2018
Payments to Acquire Businesses, Gross	$ 37,300
Goodwill		$ 8,804	$ 15,353

Acquisition Acquisitions - Flex

Acquisition Acquisitions - Flex Concepts (Details) - Flex acquisition $ in Millions	Jun. 26, 2018USD ($)
Business Acquisition
Business Acquisition, Date of Acquisition Agreement	Jun. 26, 2018
Payments to Acquire Businesses, Gross	$ 1.9

Acquisition - W.L. Gore Purchas

Acquisition - W.L. Gore Purchase Price Allocation & Additional Information (Details) - USD ($) $ in Thousands	Apr. 24, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition
Goodwill		$ 550,202	$ 359,688	$ 345,269
W.L. Gore
Business Acquisition
Business Acquisition, Date of Acquisition Agreement	Apr. 24, 2017
Payments to Acquire Businesses, Gross	$ 20,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	7 years
Other current assets	$ 726
Property, plant and equipment, net	2,447
Net Assets Acquired	11,993
Identifiable intangible assets	8,820
Goodwill	8,007
Total Purchase Price	$ 20,000

Trade Accounts and Notes Rece_3

Trade Accounts and Notes Receivable (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Accounts receivable	$ 218,098	$ 179,194
Notes receivable	4,850	5,100
Total trade accounts and notes receivable	222,948	184,294
Less allowance for doubtful accounts	893	860
Trade accounts and notes receivable, net	$ 222,055	$ 183,434

Inventories (Detail)

Inventories (Detail) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Inventory Net
Raw materials		$ 100,770	$ 58,226
Work-in-process		31,412	16,193
Finished goods	[1]	135,958	123,670
Total inventories		$ 268,140	$ 198,089
[1]	(a) Includes consignment inventories held by customers for $12.5 million and $15.6 million at December 31, 2018 and 2017, respectively.

Inventories Inventories - Addit

Inventories Inventories - Additional Detail (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Consignment inventory held by customers	$ 12.5	$ 15.6

Property, Plant and Equipment_2

Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment
Land	$ 21,913	$ 16,795
Buildings and improvements	185,175	174,615
Manufacturing equipment	298,529	274,723
Canisters and cylinders	90,790	77,325
Molds	72,089	80,198
Office furniture and equipment	142,818	121,345
Construction in progress	69,437	42,288
Total property, plant and equipment	880,751	787,289
Less accumulated depreciation	461,222	427,766
Property, plant and equipment, net	$ 419,529	$ 359,523	$ 321,562
Minimum | Building and Building Improvements
Property, Plant and Equipment
Estimated useful lives in years	5 years	5 years
Minimum | Manufacturing Equipment
Property, Plant and Equipment
Estimated useful lives in years	5 years	5 years
Minimum | Canisters and cylinders
Property, Plant and Equipment
Estimated useful lives in years	3 years	3 years
Minimum | Molds
Property, Plant and Equipment
Estimated useful lives in years	3 years	3 years
Minimum | Office Furniture and Equipment
Property, Plant and Equipment
Estimated useful lives in years	3 years	3 years
Maximum | Building and Building Improvements
Property, Plant and Equipment
Estimated useful lives in years	35 years	35 years
Maximum | Manufacturing Equipment
Property, Plant and Equipment
Estimated useful lives in years	10 years	10 years
Maximum | Canisters and cylinders
Property, Plant and Equipment
Estimated useful lives in years	12 years	12 years
Maximum | Molds
Property, Plant and Equipment
Estimated useful lives in years	5 years	5 years
Maximum | Office Furniture and Equipment
Property, Plant and Equipment
Estimated useful lives in years	8 years	8 years

Property, Plant and Equipment P

Property, Plant and Equipment Property, Plant and Equipment - Depreciation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Depreciation	$ 65,116	$ 58,208	$ 55,623

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets Goodwill Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill
Goodwill	$ 550,202	$ 359,688	$ 345,269
Purchase accounting adjustments		8,007
Addition due to acquisition	193,389
Other, including foreign currency translation	(2,875)	6,412
SCEM
Goodwill
Goodwill	301,423	304,270	297,858
Purchase accounting adjustments		0
Addition due to acquisition	0
Other, including foreign currency translation	(2,847)	6,412
MC
Goodwill
Goodwill	191,708	8,007	0
Purchase accounting adjustments		8,007
Addition due to acquisition	183,729
Other, including foreign currency translation	(28)	0
AMH
Goodwill
Goodwill	57,071	47,411	$ 47,411
Purchase accounting adjustments		0
Addition due to acquisition	9,660
Other, including foreign currency translation	$ 0	$ 0

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets Goodwill additional (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 550,202	$ 359,688	$ 345,269
Goodwill, Period Increase	$ 190,500

Intangible Assets (Detail)

Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets
Gross carrying Amount	$ 638,775	$ 463,869
Accumulated amortization	343,088	281,439
Net carrying value	$ 295,687	$ 182,430
Weighted average life in years	8 years 11 months	8 years 6 months
Developed Technology
Finite-Lived Intangible Assets
Gross carrying Amount	$ 248,776	$ 206,224
Accumulated amortization	176,421	149,215
Net carrying value	$ 72,355	$ 57,009
Weighted average life in years	7 years	6 years 7 months
Trademarks and Trade names
Finite-Lived Intangible Assets
Gross carrying Amount	$ 25,643	$ 16,807
Accumulated amortization	14,749	13,712
Net carrying value	$ 10,894	$ 3,095
Weighted average life in years	10 years 6 months	9 years 11 months
Customer Relationships
Finite-Lived Intangible Assets
Gross carrying Amount	$ 328,050	$ 220,806
Accumulated amortization	133,068	110,281
Net carrying value	$ 194,982	$ 110,525
Weighted average life in years	10 years 9 months	10 years 4 months
Other
Finite-Lived Intangible Assets
Gross carrying Amount	$ 36,306	$ 20,032
Accumulated amortization	18,850	8,231
Net carrying value	$ 17,456	$ 11,801
Weighted average life in years	4 years 1 month	6 years 8 months

Amortization Expense (Detail)

Amortization Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 62,152	$ 44,023	$ 44,263

Estimated Future Amortization E

Estimated Future Amortization Expense (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
2,019	$ 63,444
2,020	42,229
2,021	35,771
2,022	35,189
2,023	34,500
Thereafter	84,554
Intangible assets, net	$ 295,687	$ 182,430

Debt - Long-term debt schedule

Debt - Long-term debt schedule (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Nov. 10, 2017	Apr. 30, 2014
Debt Instrument
Long-term Debt, Gross	$ 950,000	$ 683,850
Unamortized discount and debt issuance costs	11,137	9,470
Total long-term debt	938,863	674,380
Less current maturities of long-term debt	4,000	100,000
Long-term debt less current maturities	934,863	574,380
Senior secured term loan facility due 2021
Debt Instrument
Long-term Debt, Gross	0	133,850		$ 460,000
Senior secured term loan facility due 2025
Debt Instrument
Long-term Debt, Gross	400,000	0
Unamortized discount and debt issuance costs	5,100
Senior unsecured notes due 2026
Debt Instrument
Long-term Debt, Gross	$ 550,000	$ 550,000	$ 550,000

Debt - Maturity Schedule (Detai

Debt - Maturity Schedule (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
2,019	$ 4,000
2,020	4,000
2,021	4,000
2,022	4,000
2,023	4,000
Thereafter	930,000
Long-term Debt, Gross	$ 950,000	$ 683,850

Debt - 2026 Senior Unsecured No

Debt - 2026 Senior Unsecured Notes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Nov. 10, 2017
Debt Instrument
Long-term Debt, Gross	$ 683,850	$ 950,000
Senior unsecured notes due 2026
Debt Instrument
Long-term Debt, Gross	$ 550,000	$ 550,000	$ 550,000
Debt Instrument, Interest Rate, Stated Percentage			4.625%
Debt Instrument, Redemption Price, Percentage	100.00%
Minimum redemption price on or after November 10, 2020	100.00%
Maximum redemption price on or after November 10, 2020	103.469%
Redemption price, change of control	101.00%
Event of default percentage	25.00%

Debt Debt - Senior Secured Cred

Debt Debt - Senior Secured Credit Facilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument
Secured Debt	$ 700,000
Unamortized discount and debt issuance costs	11,137	$ 9,470
Long-term Debt, Gross	950,000	683,850
Line of Credit Facility, Maximum Borrowing Capacity	$ 300,000
Line of Credit Facility, Commitment Fee Percentage	0.20%
Prepayment Premium Rate on Term Loans	1.00%
Prepayment % of annual excess cash flow	50.00%
Prepayment % for asset sales and casualty events	100.00%
Line of Credit Facility, Expiration Date	Nov. 6, 2023
Letters of Credit Outstanding, Amount	$ 200
Debt Instrument, Covenant Description	If at any time, commencing with the fiscal quarter ending March 31, 2019, the Company has revolving borrowings, unreimbursed letter of credit drawings and undrawn letters of credit outstanding in an amount in excess of 35.0% of the commitment amount under the New Revolving Facility, the Credit Agreement requires the Company to maintain a secured net leverage ratio of at least 3.25 to 1.0.
Debt Instrument, Covenant Compliance	The Company is in compliance with all of the above covenants
Senior secured term loan facility due 2025
Debt Instrument
Unamortized discount and debt issuance costs	$ 5,100
Long-term Debt, Gross	$ 400,000	$ 0
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	4.52%
Debt Instrument, Frequency of Periodic Payment	quarterly
Quarterly payment percentage	0.25%
Debt Instrument, Maturity Date	Nov. 6, 2025

Debt Debt - Previous Senior Sec

Debt Debt - Previous Senior Secured Loan Facilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Nov. 10, 2017	Apr. 30, 2014
Debt Instrument
Long-term Debt, Gross	$ 950,000	$ 683,850
Line of Credit Facility, Maximum Borrowing Capacity	300,000
Gain (Loss) on Extinguishment of Debt	$ (2,429)	(20,687)	$ 0
Senior unsecured notes due 2026
Debt Instrument
Percentage payment of Principle amount	100.00%
Long-term Debt, Gross	$ 550,000	550,000		$ 550,000
Senior secured term loan facility due 2021
Debt Instrument
Long-term Debt, Gross	0	133,850			$ 460,000
Revolving Credit Facility
Debt Instrument
Line of Credit Facility, Maximum Borrowing Capacity		$ 75,000
Previous Senior Secured Loan Facilities
Debt Instrument
Gain (Loss) on Extinguishment of Debt	$ (2,300)

Future Minimum Lease Payments (

Future Minimum Lease Payments (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
2,019	$ 11,360
2,020	8,906
2,021	6,836
2,022	5,431
2,023	5,208
Thereafter	27,153
Total minimum lease payments	$ 64,894

Lease Commitments - Additional

Lease Commitments - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Leases [Abstract]
Total rental expense for all equipment and building operating leases	$ 11.5	$ 10.6	$ 13.3

Asset Retirement Obligations (D

Asset Retirement Obligations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Asset Retirement Obligation [Abstract]
Asset Retirement Obligation, Beginning	$ 12,167	$ 11,529
Liabilities Settled	(758)	(577)
Liabilities Incurred	884	412
Accretion Expense	510	215
Revision of Estimate	(260)	588
Asset Retirement Obligation, Ending	$ 12,543	$ 12,167

Income Taxes Income Taxes - Red

Income Taxes Income Taxes - Reduction of U.S. federal corporate tax rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Transition Tax Due To 2017 Tax Act	$ 89	$ 72,993	$ 0
Remeasurement of Deferred Tax Assets Due To 2017 Tax Act	619	$ (10,248)	$ 0
Global Intangible Low Tax Income	2,300
Undistributed Earnings of Foreign Subsidiaries	$ 32,900
Overview [Member]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	35.00%
Reduction of US Federal Corporate Tax Rate [Member]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount		35.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount		$ 10,200
Remeasurement of Deferred Tax Assets Due To 2017 Tax Act	$ 600
Transition Tax on Foreign Earnings [Member]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount		73,000
Acceleration of Depreciation [Member]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount		1,300
Change in Other Current Liabilities due to 2017 Tax Act		3,200
Change in Deferred Tax Assets due to 2017 Tax Act		$ 1,900
Additional measurement period adjustment to income tax benefit	300
Additional measurement period adjustment decrease to deferred tax liability	400
Additional measurement period adjustment increase to income tax payable	$ 700
Tax Act New Rate [Member] | Overview [Member]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount		21.00%
Tax Act New Rate [Member] | Reduction of US Federal Corporate Tax Rate [Member]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount		21.00%

Income Taxes - Income Before In

Income Taxes - Income Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Domestic	$ 61,545	$ 13,363	$ (7,328)
Foreign	192,887	171,368	127,327
Income before income tax expense	$ 254,432	$ 184,731	$ 119,999

Income Taxes - Components of In

Income Taxes - Components of Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Current, Federal	$ (14,775)	$ 60,529	$ 7,759
Current, State	1,605	808	(10)
Current, Foreign	38,723	36,700	31,387
Current, Total	25,553	98,037	39,136
Deferred (net of valuation allowance), Federal	(13,399)	249	(8,183)
Deferred (net of valuation allowance), State	(370)	(891)	250
Deferred (net of valuation allowance), Foreign	1,893	2,270	(8,351)
Deferred Income Tax Expense (Benefit)	(11,876)	1,628	(16,284)
Income tax expense	$ 13,677	$ 99,665	$ 22,852

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Income Tax Expense With Expected Amounts Based Upon Statutory Federal Tax Rates (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Expected federal income tax at statutory rate	$ 53,431	$ 64,656	$ 42,000
State income taxes before valuation allowance, net of federal tax effect	605	(1,376)	(769)
Effect of foreign source income	2,359	(27,581)	(22,242)
Tax contingencies	468	2,816	1,103
Valuation allowance	527	3,195	1,713
U.S. federal research credit	(2,263)	(4,881)	(1,676)
Equity compensation	(3,826)	(2,321)	815
Transition Tax Due To 2017 Tax Act	89	72,993	0
Remeasurement of Deferred Tax Assets Due To 2017 Tax Act	619	(10,248)	0
Incremental Taxes on Unremitted Foreign Earnings Release Due To 2017 Tax Act	0	3,968	0
Foreign derived intangible income	(4,846)	0	0
Legal entity restructuring foreign tax credit	(25,080)	0	0
Legal entity restructuring dividends received deduction	(9,398)	0	0
Other items, net	992	(1,556)	1,908
Income tax expense	$ 13,677	$ 99,665	$ 22,852

Income Taxes - Korean and Singa

Income Taxes - Korean and Singapore subsidiary commitments (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Korea Tax Authority [Member]
Income Tax [Line Items]
Income tax benefit estimate attributable to the tax status of subsidiary	$ 4	$ 7.4	$ 3.3
Income tax expense benefit per diluted share	$ 0.03	$ 0.05	$ 0.02
additional effective tax rate benefit		$ 4.3	$ 1.9
Inland Revenue, Singapore (IRAS) [Member]
Income Tax [Line Items]
Income tax benefit estimate attributable to the tax status of subsidiary	$ 6.3	$ 4.7	$ 2.3
Income tax expense benefit per diluted share	$ 0.04	$ 0.03	$ 0.02
additional effective tax rate benefit	$ 3.6	$ 12.4	$ 6.5

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Accounts receivable	$ 247	$ 32
Inventory	4,085	4,132
Accruals not currently deductible for tax purposes	8,694	8,641
Net operating loss and credit carryforwards	15,878	15,184
Capital loss carryforward	2,450	2,391
Equity compensation	3,054	3,658
Asset impairments	452	452
Other, net	3,488	2,549
Gross deferred tax assets	38,348	37,039
Valuation allowance	(18,079)	(17,494)
Total deferred tax assets	20,269	19,545
Purchased intangible assets	(50,128)	(28,956)
Depreciation	(3,874)	(2,512)
Gross deferred tax liabilities	(54,002)	(31,468)
Total deferred tax liabilities	$ (33,733)	$ (11,923)

Income Taxes Income Taxes - Def

Income Taxes Income Taxes - Deferred tax additional information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Deferred Tax Liabilities, Net	$ (33,733)	$ (11,923)
Deferred Tax Assets, Valuation Allowance	18,079	17,494
Domestic Tax Authority
Income Taxes [Line Items]
Deferred Tax Liabilities, Net	(24,500)	(5,100)
Deferred Tax Assets, Valuation Allowance	10,700	10,600
State and Local Jurisdiction
Income Taxes [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	$ 8,000
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2019
Foreign Tax Authority
Income Taxes [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 7,300	6,900
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2019
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	$ 26,600
Deferred Tax Assets, Net	8,800	$ 10,700
SPG acquisition member | Domestic Tax Authority
Income Taxes [Line Items]
Deferred Tax Liabilities, Net	$ (34,600)

Income Taxes - Reconciliations

Income Taxes - Reconciliations of Total Amount of Gross Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Gross unrecognized tax benefits at beginning of year	$ 12,561	$ 8,293
Increase in tax positions for prior years	61	298
Increase in tax positions from prior years	(234)	0
Increases in tax positions for current year	2,970	4,724
Increases in tax positions for current year	(2,577)	0
Lapse in statute of limitations	(486)	(754)
Gross unrecognized tax benefits at end of year	$ 12,295	$ 12,561

Income Taxes Income Tax - Unrec

Income Taxes Income Tax - Unrecognized tax benefits additional information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes [Line Items]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 9.3
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	1.7	$ 1
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	0.8	$ 0.3	$ 0.1
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ 1.2
Domestic Tax Authority
Income Taxes [Line Items]
Year Which Prior Year's Tax Returns Are No Longer Subject to Tax Examination	Dec. 31, 2014
State and Local Jurisdiction
Income Taxes [Line Items]
Year Which Prior Year's Tax Returns Are No Longer Subject to Tax Examination	Dec. 31, 2014
Foreign Tax Authority
Income Taxes [Line Items]
Year Which Prior Year's Tax Returns Are No Longer Subject to Tax Examination	Dec. 31, 2012

Equity - Summary of Option Acti

Equity - Summary of Option Activity (Detail) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Number of shares
Number of shares, Options outstanding, beginning of year	1,869	1,907	2,139
Number of shares, Granted	296	335	549
Number of shares, Exercised	(727)	(359)	(633)
Number of shares, Expired or Forfeited	(28)	(14)	(148)
Number of shares, Options outstanding, end of year	1,410	1,869	1,907
Number of shares, Options exercisable, end of year	562	872	776
Weighted average exercise price
Weighted average exercise price, Options outstanding, beginning of year	$ 13.46	$ 11.54	$ 10.57
Weighted average exercise price, Granted	31.10	21.60	12.20
Weighted average exercise price, Exercised	10.89	10.89	8.66
Weighted average exercise price, Expired or Forfeited	26.41	12.78	12.32
Weighted average exercise price, Options outstanding, end of year	18.22	13.46	11.54
Weighted average exercise price, Options exercisable, end of year	$ 13.68	$ 11.11	$ 10.65

Equity - Summary of Options Out

Equity - Summary of Options Outstanding (Detail) - $ / shares shares in Thousands	3 Months Ended					12 Months Ended
	Dec. 31, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Number of Options outstanding	1,410					1,410
Options outstanding, Weighted average remaining life in years						4 years 5 months
Options outstanding, Weighted-average exercise price	$ 18.22					$ 18.22
Number of Options exercisable	562					562
Options exercisable, Weighted average exercise price	$ 13.68					$ 13.68
Dividends declared per share	$ 0.07	$ 0.07	$ 0.07	$ 0.07	$ 0.07
Range One
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Range of exercise prices, minimum							$ 9.88
Range of exercise prices, maximum							11.71
Number of Options outstanding	107					107
Options outstanding, Weighted average remaining life in years						1 year 9 months
Options outstanding, Weighted-average exercise price	$ 11.09					$ 11.09
Number of Options exercisable	107					107
Options exercisable, Weighted average exercise price	$ 11.09					$ 11.09
Range Two
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Range of exercise prices, minimum							12.20
Range of exercise prices, maximum							12.20
Number of Options outstanding	438					438
Options outstanding, Weighted average remaining life in years						4 years 1 month
Options outstanding, Weighted-average exercise price	$ 12.20					$ 12.20
Number of Options exercisable	190					190
Options exercisable, Weighted average exercise price	$ 12.20					$ 12.20
Range Three
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Range of exercise prices, minimum							13.49
Range of exercise prices, maximum							13.49
Number of Options outstanding	271					271
Options outstanding, Weighted average remaining life in years						3 years 1 month
Options outstanding, Weighted-average exercise price	$ 13.49					$ 13.49
Number of Options exercisable	189					189
Options exercisable, Weighted average exercise price	$ 13.49					$ 13.49
Range Four
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Range of exercise prices, minimum							21.60
Range of exercise prices, maximum							21.60
Number of Options outstanding	313					313
Options outstanding, Weighted average remaining life in years						5 years 1 month
Options outstanding, Weighted-average exercise price	$ 21.60					$ 21.60
Number of Options exercisable	76					76
Options exercisable, Weighted average exercise price	$ 21.60					$ 21.60
Range Five
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Range of exercise prices, minimum							31.10
Range of exercise prices, maximum							$ 31.10
Number of Options outstanding	281					281
Options outstanding, Weighted average remaining life in years						6 years 1 month
Options outstanding, Weighted-average exercise price	$ 31.10					$ 31.10
Number of Options exercisable	0					0
Options exercisable, Weighted average exercise price	$ 0					$ 0

Equity - Weighted Average Assum

Equity - Weighted Average Assumptions Used in Valuation (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Equity [Abstract]
Volatility	28.70%	26.90%	27.60%
Risk-free interest rate	2.40%	1.70%	1.10%
Dividend yield	0.90%	0.00%	0.00%
Expected life (years)	3 years 11 months	4 years 1 month	4 years
Weighted average fair value per option	$ 7.35	$ 5.25	$ 2.85

Summary of Restricted Stock Act

Summary of Restricted Stock Activity (Detail) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Number of shares
Number of shares, Unvested, beginning of year	1,857	2,164	1,882
Number of shares, Granted	509	659	1,249
Number of shares, Vested	(732)	(801)	(711)
Number of shares, Forfeited	(115)	(165)	(256)
Number of shares, Unvested, end of year	1,519	1,857	2,164
Weighted average grant date fair value, Unvested
Weighted average grant date fair value, Unvested, beginning of year	$ 15.86	$ 12.49	$ 12.25
Weighted average grant date fair value, Granted	31.40	22.14	12.42
Weighted average grant date fair value, Vested	15.07	12.22	11.74
Weighted average grant date fair value, Forfeited	18.58	14.48	12.44
Weighted average grant date fair value, Unvested, end of year	$ 21.24	$ 15.86	$ 12.49

Summary of Allocation of Share

Summary of Allocation of Share Based Compensation Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 17,112	$ 15,306	$ 13,436
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	3,421	4,978	4,153
Share-based compensation expense, net of tax	13,691	10,328	9,283
Cost of Sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	1,009	1,031	1,579
Engineering, Research and Development Expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	1,689	1,457	1,124
Selling, General And Administrative Expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 14,414	$ 12,818	$ 10,733

Equity - Additional Information

Equity - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						12 Months Ended
	Mar. 30, 2019	Dec. 31, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Feb. 15, 2017
Equity [Line Items]
Dividends declared per share		$ 0.07	$ 0.07	$ 0.07	$ 0.07	$ 0.07
Dividends, Common Stock, Cash							$ 39,722	$ 9,896
Common Stock, Dividends, Per Share, Declared							$ 0.28	$ 0.07	$ 0
Stock Repurchase Program, Authorized Amount		$ 350,000					$ 350,000				$ 100,000
Additional stock repurchase authorization		$ 250,000					250,000
Stock Repurchased and Retired During Period, Value							179,315	$ 28,000	$ 7,573
Payments for Repurchase of Common Stock							$ 173,781	28,000	$ 7,573
Shares absorbed into plan										5,700
Term of plan, in years							10 years
Weighted average remaining contractual term option outstanding							4 years 5 months
Weighted average remaining contractual term option exercisable							3 years 6 months
Total pre-tax intrinsic value of stock options exercised							$ 16,700	$ 4,800
Total pre-tax intrinsic value based on the closing stock price		$ 27.90					$ 27.90
Intrinsic value of stock options outstanding		$ 14,600					$ 14,600
Intrinsic value of stock options exercisable		$ 8,000					$ 8,000
Share-based payment awards in the form of stock option awards							296	335	549
Contractual term of stock options (in years)							7 years
Shares available for future grants		8,700				8,800	8,700	8,800	9,400
Weighted average remaining contractual term for unvested restricted shares, in years							1 year 11 months	2 years 1 month
performance shares granted							200	100	200
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition							2 years 5 months
Minimum
Equity [Line Items]
Vesting period, in years							3 years
Maximum
Equity [Line Items]
Vesting period, in years							4 years
Unvested Stock Options
Equity [Line Items]
Total compensation cost not yet recognized		$ 3,000					$ 3,000
Performance Stock
Equity [Line Items]
Total compensation cost not yet recognized		2,200					2,200
Restricted Stock
Equity [Line Items]
Total compensation cost not yet recognized		$ 20,600					$ 20,600
Employee Stock Purchase Plan
Equity [Line Items]
Percentage of employee contribution from compensation							10.00%
Rate of discount from the fair market value							15.00%
Shares available for future grants		1,900					1,900
Shares purchase by employees							200	200	300
Weighted-average price per share paid by the employees		$ 24.86				$ 16.92	$ 24.86	$ 16.92	$ 11.56
Subsequent Event [Member]
Equity [Line Items]
Common Stock, Dividends, Per Share, Declared	$ 0.07

Benefit Plans - Additional Info

Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan [Abstract]
Maximum matching contribution	4.00%
Employer profit sharing and matching contribution expense	$ 6.1	$ 5.1	$ 4.9

Estimated Funded Status (Detail

Estimated Funded Status (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	$ 7,682	$ 7,073
Service cost	50	38	$ 66
Interest cost	62	46	91
Actuarial (gain) loss	75	302
Benefits paid	(560)	(222)
Other	11	7
Foreign exchange impact	(12)	438
Benefit obligation at end of year	7,308	7,682	7,073
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	908	743
Return on plan assets	31	5
Employer contributions	110	88
Benefits paid	(185)	0
Foreign exchange impact	(29)	72
Fair value of plan assets at end of year	835	908	$ 743
Plan assets less than benefit obligation - Net amount recognized	$ (6,473)	$ (6,774)

Amounts Recognized in Consolida

Amounts Recognized in Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan [Abstract]
Noncurrent liability	$ (6,473)	$ (6,774)
Accumulated Other Comprehensive loss, net of taxes	$ 860	$ 919

Amounts Recognized in Accumulat

Amounts Recognized in Accumulated Other Comprehensive Loss Net of Tax (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan [Abstract]
Net actuarial loss	$ 514	$ 490
Prior service cost	616	705
Gross amount recognized	1,130	1,195
Deferred income taxes	(270)	(276)
Net amount recognized	$ 860	$ 919

Pension Plans Accumulated Benef

Pension Plans Accumulated Benefit Obligation in Excess of Plan Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan [Abstract]
Projected benefit obligation	$ 6,473	$ 6,774
Accumulated benefit obligation	6,235	6,497
Fair value of plan assets	$ 835	$ 908

Components of Net Periodic Bene

Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan [Abstract]
Service cost	$ 50	$ 38	$ 66
Interest cost	62	46	91
Expected return on plan assets	(18)	(11)	(10)
Amortization of prior service cost	69	69	65
Amortization of net transition obligation	0	22	0
Amortization of plan loss	20	0	0
Recognized actuarial net loss	0	0	17
Net periodic pension benefit cost	$ 183	$ 164	$ 229

Estimated Amount Amortized from

Estimated Amount Amortized from Accumulated Other Comprehensive Income Into Net Periodic Benefit Cost (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Defined Benefit Plan [Abstract]
Prior service cost	$ 68
Net actuarial loss	17
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year, Total	$ 85

Assumptions Used in Determining

Assumptions Used in Determining Benefit Obligation and Net Periodic Benefit Cost for Pension Plans (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan [Abstract]
Benefit obligations, Discount rate	0.76%	0.82%	0.63%
Benefit obligations, Rate of compensation increase	3.08%	3.05%	2.90%
Net periodic benefit cost, Discount rate	1.66%	1.45%	1.70%
Net periodic benefit cost, Rate of compensation increase	3.18%	3.00%	3.43%
Net periodic benefit cost, Expected return on plan assets	1.89%	1.80%	1.43%

Fair Value Measurements of Pens

Fair Value Measurements of Pension Plan Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 835	$ 908	$ 743
Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	835	908
TAIWAN, PROVINCE OF CHINA
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	669	830
TAIWAN, PROVINCE OF CHINA | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	669	830
GERMANY
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	166	78
GERMANY | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 166	$ 78

Expected Contribution and Benef

Expected Contribution and Benefit Payments (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Defined Benefit Plan [Abstract]
Contribution in year 2019	$ 93
Payments in year 2019	36
Payments in year 2020	33
Payments in year 2021	217
Payments in year 2022	201
Payments in year 2023	251
Payments in years 2024-2028	$ 2,197

Financial Assets Measured at Fa

Financial Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts(a)		$ 0	$ 36
Total assets measured and recorded at fair value		0	36
Foreign currency contracts(a)	[1]	589	0
Total liabilities measured and recorded at fair value		589	0
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts(a)		0	0
Total assets measured and recorded at fair value		0	0
Foreign currency contracts(a)	[1]	0	0
Total liabilities measured and recorded at fair value		0	0
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts(a)		0	36
Total assets measured and recorded at fair value		0	36
Foreign currency contracts(a)	[1]	589	0
Total liabilities measured and recorded at fair value		589	0
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts(a)		0	0
Total assets measured and recorded at fair value		0	0
Foreign currency contracts(a)	[1]	0	0
Total liabilities measured and recorded at fair value		$ 0	$ 0
[1]	(a)Based on observable market transactions of spot currency rates and forward rates on equivalently-termed instruments.

Fair Value Measurements Informa

Fair Value Measurements Information about derivative positions (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Gross Derivative Asset	$ 589	$ 36
Gross Derivative Liability	0	0
Foreign exchange forward contracts asset, net	$ 589	$ 36

Fair Value Measurements (Losses

Fair Value Measurements (Losses) gains on forward currency contracts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Losses on foreign exchange forward contracts	$ (1,287)	$ (2,209)	$ (1,647)

Earnings Per Share (EPS) - Reco

Earnings Per Share (EPS) - Reconciliation of Share Amount Used in Computation of Basic and Diluted Earnings Per Share (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Basic earnings per share-Weighted common shares outstanding	141,026	141,553	141,093
Weighted common shares assumed upon exercise of options and vesting of restricted stock units	1,584	1,965	957
Diluted earnings per share-Weighted common shares outstanding	142,610	143,518	142,050

Earnings Per Share (EPS) - Shar

Earnings Per Share (EPS) - Shares Excluded Underlying Stock Based Awards from Calculations of Diluted EPS (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Shares excluded from calculations of diluted EPS	267	303	434

Segment information - Summary o

Segment information - Summary of Financial Information for Reportable Segments (Detail) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018USD ($)	Sep. 29, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Sep. 30, 2017USD ($)	Jul. 01, 2017USD ($)	Apr. 01, 2017USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Segment Reporting Information
Number of Reportable Segments									3
Total net sales	$ 401,642	$ 398,597	$ 383,059	$ 367,199	$ 350,562	$ 345,591	$ 329,002	$ 317,377	$ 1,550,497	$ 1,342,532	$ 1,175,270
Total segment profit									386,259	313,053	227,521
Total assets	2,317,641				1,976,172				2,317,641	1,976,172	1,699,532
Total depreciation and amortization									127,268	102,231	99,886
Total capital expenditures									110,153	93,597	65,260
SCEM
Segment Reporting Information
Total net sales									530,241	485,470	428,328
Total segment profit									129,754	111,802	77,328
Total assets	757,381				749,379				757,381	749,379	766,126
Total depreciation and amortization									70,329	66,514	64,959
Total capital expenditures									44,337	44,350	23,138
MC
Segment Reporting Information
Total net sales									552,844	436,225	362,658
Total segment profit									173,964	141,413	93,911
Total assets	680,080				251,216				680,080	251,216	200,399
Total depreciation and amortization									33,590	13,744	9,995
Total capital expenditures									38,331	27,178	9,880
AMH
Segment Reporting Information
Total net sales									467,412	420,837	384,284
Total segment profit									82,541	59,838	56,282
Total assets	359,991				278,079				359,991	278,079	267,085
Total depreciation and amortization									22,805	21,003	23,697
Total capital expenditures									26,545	18,378	31,634
Corporate
Segment Reporting Information
Total assets	$ 520,189				$ 697,498				520,189	697,498	465,922
Total depreciation and amortization									544	970	1,235
Total capital expenditures									$ 940	$ 3,691	$ 608

Segment Information - Reconcili

Segment Information - Reconciliation of Total Segment Profit to Operating Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting [Abstract]
Total segment profit	$ 386,259	$ 313,053	$ 227,521
Amortization of intangibles	62,152	44,023	44,263
Unallocated general and administrative expenses	31,418	27,213	27,722
Operating income	292,689	241,817	155,536
Interest expense	34,094	32,343	36,846
Interest income	3,839	715	318
Other expense (income), net	8,002	25,458	(991)
Income before income tax expense	$ 254,432	$ 184,731	$ 119,999

Segment Information - Summary_2

Segment Information - Summary of Total Net Sales to External Customers (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information
Net sales	$ 401,642	$ 398,597	$ 383,059	$ 367,199	$ 350,562	$ 345,591	$ 329,002	$ 317,377	$ 1,550,497	$ 1,342,532	$ 1,175,270
TAIWAN, PROVINCE OF CHINA
Segment Reporting Information
Net sales									289,863	289,714	291,309
UNITED STATES
Segment Reporting Information
Net sales									347,032	286,339	253,868
KOREA, REPUBLIC OF
Segment Reporting Information
Net sales									242,396	216,868	145,661
JAPAN
Segment Reporting Information
Net sales									210,755	169,480	156,021
CHINA
Segment Reporting Information
Net sales									204,385	148,890	118,435
EUROPE
Segment Reporting Information
Net sales									138,075	120,481	105,779
SOUTHEAST ASIA
Segment Reporting Information
Net sales									117,991	110,760	104,197
SCEM
Segment Reporting Information
Net sales									530,241	485,470	428,328
SCEM | TAIWAN, PROVINCE OF CHINA
Segment Reporting Information
Net sales									104,707	113,279	107,806
SCEM | UNITED STATES
Segment Reporting Information
Net sales									133,834	117,602	98,436
SCEM | KOREA, REPUBLIC OF
Segment Reporting Information
Net sales									82,890	74,773	57,538
SCEM | JAPAN
Segment Reporting Information
Net sales									52,731	41,164	31,232
SCEM | CHINA
Segment Reporting Information
Net sales									68,365	64,796	58,282
SCEM | EUROPE
Segment Reporting Information
Net sales									32,088	30,472	29,890
SCEM | SOUTHEAST ASIA
Segment Reporting Information
Net sales									55,626	43,384	45,144
MC
Segment Reporting Information
Net sales									552,844	436,225	362,658
MC | TAIWAN, PROVINCE OF CHINA
Segment Reporting Information
Net sales									118,208	109,815	109,509
MC | UNITED STATES
Segment Reporting Information
Net sales									94,427	70,834	57,594
MC | KOREA, REPUBLIC OF
Segment Reporting Information
Net sales									74,623	65,677	36,477
MC | JAPAN
Segment Reporting Information
Net sales									110,997	89,638	86,927
MC | CHINA
Segment Reporting Information
Net sales									84,652	45,382	27,544
MC | EUROPE
Segment Reporting Information
Net sales									40,635	30,479	24,866
MC | SOUTHEAST ASIA
Segment Reporting Information
Net sales									29,302	24,400	19,741
AMH
Segment Reporting Information
Net sales									467,412	420,837	384,284
AMH | TAIWAN, PROVINCE OF CHINA
Segment Reporting Information
Net sales									66,948	66,620	73,994
AMH | UNITED STATES
Segment Reporting Information
Net sales									118,771	97,903	97,838
AMH | KOREA, REPUBLIC OF
Segment Reporting Information
Net sales									84,883	76,418	51,646
AMH | JAPAN
Segment Reporting Information
Net sales									47,027	38,678	37,862
AMH | CHINA
Segment Reporting Information
Net sales									51,368	38,712	32,609
AMH | EUROPE
Segment Reporting Information
Net sales									65,352	59,530	51,023
AMH | SOUTHEAST ASIA
Segment Reporting Information
Net sales									$ 33,063	$ 42,976	$ 39,312

Segment Information - Summary_3

Segment Information - Summary of Property, Plant and Equipment Attributed to Significant Countries (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information
Property, plant and equipment	$ 419,529	$ 359,523	$ 321,562
UNITED STATES
Segment Reporting Information
Property, plant and equipment	289,049	257,584	226,394
KOREA, REPUBLIC OF
Segment Reporting Information
Property, plant and equipment	41,698	39,562	33,441
JAPAN
Segment Reporting Information
Property, plant and equipment	34,276	23,648	25,248
Malaysia
Segment Reporting Information
Property, plant and equipment	31,138	19,212	19,180
TAIWAN, PROVINCE OF CHINA
Segment Reporting Information
Property, plant and equipment	18,804	16,073	14,151
All Other Segments
Segment Reporting Information
Property, plant and equipment	$ 4,564	$ 3,444	$ 3,148

Segment Information - Sales fro

Segment Information - Sales from Largest Customer (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net sales	$ 401,642	$ 398,597	$ 383,059	$ 367,199	$ 350,562	$ 345,591	$ 329,002	$ 317,377	$ 1,550,497	$ 1,342,532	$ 1,175,270
TSMC
Net sales									153,900	167,900	$ 161,900
Samsung
Net sales									$ 164,300	$ 140,600

Quarterly Information (Detail)

Quarterly Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Selected Quarterly Financial Information [Abstract]
Net sales	$ 401,642	$ 398,597	$ 383,059	$ 367,199	$ 350,562	$ 345,591	$ 329,002	$ 317,377	$ 1,550,497	$ 1,342,532	$ 1,175,270
Gross profit	179,740	181,716	182,378	175,997	163,679	155,407	150,303	139,596	719,831	608,985	508,691
Net income	$ 80,784	$ 48,060	$ 54,349	$ 57,562	$ (28,341)	$ 40,902	$ 39,991	$ 32,514	$ 240,755	$ 85,066	$ 97,147
Basic net income (loss) per common share	$ 0.58	$ 0.34	$ 0.38	$ 0.41	$ (0.20)	$ 0.29	$ 0.28	$ 0.23	$ 1.71	$ 0.60	$ 0.69
Diluted net income (loss) per common share	$ 0.57	$ 0.34	$ 0.38	$ 0.40	$ (0.20)	$ 0.28	$ 0.28	$ 0.23	$ 1.69	$ 0.59	$ 0.68

Subsequent Event Subsequent E_2

Subsequent Event Subsequent Event (Details) - Versum Materials, Inc. [Member] - Subsequent Event [Member] $ in Millions	Jan. 27, 2019USD ($)
Subsequent Event [Line Items]
Subsequent Event, Date	Jan. 28, 2019
Exchange ratio	1.120
Incremental term loan	$ 987