Entegris (ENTG) 10-Q 26 Jul 18 2018 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Jul. 23, 2018
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Trading Symbol	ENTG
Entity Registrant Name	ENTEGRIS INC
Entity Central Index Key	1,101,302
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		141,631,382

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 257,106	$ 625,408
Trade accounts and notes receivable, net of allowance for doubtful accounts of $803 and $860	200,395	183,434
Inventories	265,358	198,089
Deferred tax charges and refundable income taxes	21,647	18,012
Other current assets	29,720	32,665
Total current assets	774,226	1,057,608
Property, plant and equipment, net of accumulated depreciation of $456,669 and $427,766	380,259	359,523
Other assets:
Goodwill	529,933	359,688
Intangible assets, net of accumulated amortization of $304,416 and $281,439	361,429	182,430
Deferred tax assets and other noncurrent tax assets	10,980	9,103
Other	9,281	7,820
Total assets	2,066,108	1,976,172
Current liabilities:
Long-term debt, current maturities	0	100,000
Accounts payable	71,895	68,762
Accrued payroll and related benefits	56,831	64,860
Other accrued liabilities	56,828	34,514
Income taxes payable	18,708	22,835
Total current liabilities	204,262	290,971
Long-term debt, excluding current maturities, net of unamortized discount and debt issuance costs of $8,627 and $9,470	650,223	574,380
Pension benefit obligations and other liabilities	30,977	32,130
Deferred tax liabilities and other noncurrent tax liabilities	127,741	85,673
Commitments and contingent liabilities	0	0
Equity:
Preferred stock, par value $.01; 5,000,000 shares authorized; none issued and outstanding as of June 30, 2018 and December 31, 2017	0	0
Common stock, par value $.01; 400,000,000 shares authorized; issued and outstanding shares as of June 30, 2018 and December 31, 2017: 141,691,182 and 141,282,539	1,417	1,413
Additional paid-in capital	861,357	867,699
Retained earnings	222,381	147,418
Accumulated other comprehensive loss	(32,250)	(23,512)
Total equity	1,052,905	993,018
Total liabilities and equity	$ 2,066,108	$ 1,976,172

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Trade accounts and notes receivable, allowance for doubtful accounts	$ 803	$ 860
Property, plant and equipment, accumulated depreciation	456,669	427,766
Intangible assets, Accumulated amortization	304,416	281,439
Unamortized discount and debt issuance costs	$ 8,627	$ 9,470
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	141,691,182	141,282,539
Common stock, shares outstanding	141,691,182	141,282,539

Condensed Consolidated Statemen

Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Net Sales	$ 383,059	$ 329,002	$ 750,258	$ 646,379
Cost of sales	200,681	178,699	391,883	356,480
Gross profit	182,378	150,303	358,375	289,899
Selling, general and administrative expenses	65,200	52,985	123,469	103,477
Engineering, research and development expenses	30,231	27,221	57,817	54,460
Amortization of intangible assets	12,014	11,007	23,683	21,952
Operating income	74,933	59,090	153,406	110,010
Interest expense	8,296	8,196	16,455	16,669
Interest income	(1,371)	(93)	(2,304)	(173)
Other expense (income), net	3,877	(46)	4,016	856
Income before income tax expense	64,131	51,033	135,239	92,658
Income tax expense	9,782	11,042	23,328	20,153
Net income	$ 54,349	$ 39,991	$ 111,911	$ 72,505
Basic net income per common share	$ 0.38	$ 0.28	$ 0.79	$ 0.51
Diluted net income per common share	$ 0.38	$ 0.28	$ 0.78	$ 0.51
Weighted shares outstanding:
Basic	141,701	141,696	141,641	141,599
Diluted	143,238	143,508	143,445	143,411

Condensed Consolidated Stateme5

Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Net income	$ 54,349	$ 39,991	$ 111,911	$ 72,505
Other comprehensive income, net of tax
Foreign currency translation adjustments	(12,626)	(4,039)	(8,791)	12,084
Pension liability adjustments	49	18	53	6
Other comprehensive (loss) income	(12,577)	(4,021)	(8,738)	12,090
Comprehensive income	$ 41,772	$ 35,970	$ 103,173	$ 84,595

Condensed Consolidated Stateme6

Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017
Operating activities:
Net income	$ 111,911	$ 72,505
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	31,699	28,388
Amortization	23,683	21,952
Share-based compensation expense	8,557	7,909
Provision for deferred income taxes	(1,757)	3,207
Other	4,640	10,130
Changes in operating assets and liabilities:
Trade accounts and notes receivable	2,687	(3,032)
Inventories	(22,472)	(13,837)
Accounts payable and accrued liabilities	(14,966)	(13,313)
Other current assets	1,976	4,014
Income taxes payable and refundable income taxes	(7,515)	2,957
Other	(1,337)	(2,289)
Net cash provided by operating activities	137,106	118,591
Investing activities:
Acquisition of property, plant and equipment	(47,437)	(42,492)
Acquisition of businesses, net of cash acquired	(380,225)	(20,000)
Other	1,905	211
Net cash used in investing activities	(425,757)	(62,281)
Financing activities:
Payments of long-term debt	(27,000)	(50,000)
Payments for dividends	(19,802)	0
Issuance of common stock	3,027	2,905
Repurchase and retirement of common stock	(20,000)	(8,000)
Taxes paid related to net share settlement of equity awards	(14,413)	(5,239)
Other	1,504	(1,270)
Net cash used in financing activities	(76,684)	(61,604)
Effect of exchange rate changes on cash and cash equivalents	(2,967)	4,540
Decrease in cash and cash equivalents	(368,302)	(754)
Cash and cash equivalents at beginning of period	625,408	406,389
Cash and cash equivalents at end of period	257,106	405,635
Supplemental Cash Flow Information [Abstract]
Capital Expenditures Incurred but Not yet Paid	8,090	4,930
Capital Lease Obligations Incurred	0	4,768
Schedule of interest and taxes paid
Interest paid	9,159	14,548
Income taxes paid, net of refunds received	$ 31,881	$ 14,605

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of Operations Entegris, Inc. (“Entegris”, “the Company”, “us”, “we”, or “our”) 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 condensed 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 The preparation of condensed consolidated financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, particularly receivables, inventories, property, plant and equipment, goodwill, intangibles, accrued expenses, and income taxes and related accounts, and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Basis of Presentation The condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States and contain all adjustments considered necessary, and are of a normal recurring nature, to present fairly the financial position as of June 30, 2018 and December 31, 2017 , and the results of operations and comprehensive income for the three and six months ended June 30, 2018 and July 1, 2017 , and cash flows for the six months ended June 30, 2018 and July 1, 2017 . The condensed consolidated financial statements and accompanying notes are presented as permitted by Form 10-Q and do not contain certain information included in the Company’s annual consolidated financial statements and notes. The information included in this Form 10-Q should be read in conjunction with Management’s Discussion and Analysis and consolidated financial statements and notes thereto included in the Company’s Form 10-K for the year ended December 31, 2017 . The results of operations for the three and six months ended June 30, 2018 are not necessarily indicative of the results to be expected for the full year. 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 items. The fair value of long-term debt, including current maturities, was $622.8 million at June 30, 2018 , compared to the carrying amount of long-term debt, including current maturities, of $650.2 million . 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. Recent Accounting Pronouncements Adopted in 2018 In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 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 condensed consolidated financial statements for further details. Recent Accounting Pronouncements Yet to be Adopted In February 2016, the FASB issued ASU No. 2016-02, Leases . ASU No. 2016-02 requires the identification of arrangements that should be accounted for as leases by lessees. In general, for lease arrangements exceeding a twelve-month term, these arrangements must now be recognized as assets and liabilities on the balance sheet of the lessee. Under ASU No. 2016-02, a right-of-use asset and lease obligation will be recorded for all leases, whether operating or financing, while the income statement will reflect lease expense for operating leases, and amortization and interest expense for financing leases. The balance sheet amount recorded for existing leases at the date of adoption of ASU No. 2016-02 must be calculated using the applicable incremental borrowing rate at the date of adoption. In addition, ASU No. 2016-02 requires the use of the modified retrospective method, which will require adjustment to all comparative periods presented in the consolidated financial statements. ASU No. 2016-02 is effective beginning January 1, 2019. The Company is currently assessing the impact that adopting this new accounting standard will have on its consolidated financial statements and disclosures, and the timing of adoption.

Revenues (Notes)

Revenues (Notes)	6 Months Ended
	Jun. 30, 2018
Revenues [Abstract]
Revenue from Contract with Customer [Text Block]	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 the quarter ended June 30, 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 quarter ended June 30, 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 does not disclose information about 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 condensed 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 at which the Company has satisfied the performance obligation. 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. 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.

Acquisition (Notes)

Acquisition (Notes)	6 Months Ended
	Jun. 30, 2018
Business Acquisition [Line Items]
Business Combination Disclosure [Text Block]	ACQUISITIONS SAES Pure Gas On June 25, 2018 , the Company acquired the SAES Pure Gas business (SPG), from SAES Getters S.p.A. for approximately $352.5 million in cash, or $341.2 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 condensed consolidated financial statements as of and since June 25, 2018 . Direct costs of $4.8 million and $4.8 million associated with the acquisition of SPG, consisting mainly of professional and consulting fees, were expensed as incurred in the three and six months ended June 30, 2018, respectively. These costs are included in selling, general and administrative expense in the Company's condensed consolidated statements of operations. 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 will report into the Microcontamination Control division of the Company. This acquisition will expand 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): Accounts receivable $ 15,805 Inventory 46,073 Other current assets 424 Property, plant and equipment 7,345 Identifiable intangible assets 178,220 Other noncurrent assets 398 Current liabilities (26,196 ) Deferred tax liabilities (42,110 ) Other noncurrent liabilities (1,006 ) Net assets acquired 178,953 Goodwill 162,251 Total purchase price, net of cash acquired $ 341,204 The fair value of acquired inventories of $46.1 million is provisional pending the Company's review of the calculations underlying the valuation for those assets and 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 $10.2 million , the amount of which will be amortized over the expected turn of the acquired inventory. Accordingly, a $0.2 million and $0.2 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 three and six months ended June 30, 2018. The fair value of acquired property, plant and equipment of $7.3 million is valued at its value-in-use and is provisional pending the Company's completion of its valuation of certain assets, and its final review thereof. The fair value of the acquired intangible assets is $178.2 million and is provisional pending the Company’s review of the calculations underlying the valuation of those assets. The acquired intangible assets, all of which are finite-lived, have a weighted average useful life of approximately 13.8 years and are being amortized on a straight-line basis. The intangible assets that comprise the amount include customer relationships of $148.2 million ( 15.0 -year weighted average useful life), developed technology of $17.9 million ( 9.0 -year weighted average useful life), trade names of $6.7 million ( 10.0 -year weighted average useful life), and other intangible assets of $5.5 million ( 1.0 -year weighted average useful life). The fair value of acquired identifiable intangible assets was determined using the “income approach” on an individual project basis. In performing these valuations, the key underlying probability-adjusted assumptions of the discounted cash flows were projected revenues, gross margin expectations and operating cost estimates. The valuations were based on the information that was available as of the acquisition date and the expectations and assumptions that have been deemed reasonable by the Company’s management. There are inherent uncertainties and management judgment required in these determinations. 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 $162.3 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. 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. Three months ended Six months ended (In thousands, except per share data) (Unaudited) June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Net sales $ 405,404 $ 352,430 $ 803,955 $ 693,295 Net income 67,699 43,336 130,625 60,865 Per share amounts: Net income per common share - basic $ 0.48 $ 0.31 $ 0.92 $ 0.43 Net income per common share - diluted 0.47 0.30 0.91 0.42 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 merger 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 three and six months ended June 30, 2018 excludes the incremental charge of $0.2 million and $0.2 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 six months ended June 30, 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 , subject to revision for customary working capital adjustments, 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 preliminary allocation of the purchase price to the fair values assigned to the assets acquired and liabilities assumed at the date of acquisition: (In thousands): Amount Accounts receivable $ 3,898 Inventory 1,827 Other current assets 23 Property, plant and equipment 103 Other noncurrent assets 3 Identifiable intangible assets 25,600 Accounts payables (310 ) Accrued expenses (2,667 ) Net assets acquired 28,477 Goodwill 8,820 Total purchase price $ 37,297 As of June 30, 2018, the Company has not finalized its fair value determinations of the assets acquired and liabilities assumed. The preliminary 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. The valuation of the acquired assets and liabilities assumed is currently being reviewed, with the expectation of completion in the third quarter. 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. As of June 30, 2018, the Company has not finalized its fair value determinations of the assets acquired and liabilities assumed. The preliminary 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. The valuation of the acquired assets and liabilities assumed is currently being reviewed, with the expectation of completion in the third quarter.

Inventories

Inventories	6 Months Ended
	Jun. 30, 2018
Inventory Disclosure [Abstract]
Inventories	INVENTORIES Inventories consist of the following: (In thousands) June 30, 2018 December 31, 2017 Raw materials $ 87,086 $ 58,226 Work-in process 38,677 16,193 Finished goods 139,595 123,670 Total inventories $ 265,358 $ 198,089

Goodwill and Intangible Assets

Goodwill and Intangible Assets	6 Months Ended
	Jun. 30, 2018
Intangible Assets	GOODWILL AND INTANGIBLE ASSETS Goodwill activity for each period was as follows: (In thousands) Specialty Chemicals and Engineered Materials Micro-contamination Control Advanced Materials Handling Total December 31, 2017 $ 304,270 8,007 $ 47,411 $ 359,688 Addition due to acquisitions — 162,251 10,381 172,632 Foreign currency translation (2,387 ) — — (2,387 ) June 30, 2018 $ 301,883 $ 170,258 $ 57,792 $ 529,933 Identifiable intangible assets at June 30, 2018 and December 31, 2017 consist of the following: June 30, 2018 (In thousands) Gross carrying Amount Accumulated amortization Net carrying value Developed technology $ 246,610 $ 162,432 $ 84,178 Trademarks and trade names 25,655 14,059 11,596 Customer relationships 367,723 119,049 248,674 Other 25,857 8,876 16,981 $ 665,845 $ 304,416 $ 361,429 December 31, 2017 (In thousands) Gross carrying amount Accumulated amortization Net carrying value Developed technology $ 206,224 $ 149,215 $ 57,009 Trademarks and trade names 16,807 13,712 3,095 Customer relationships 220,806 110,281 110,525 Other 20,032 8,231 11,801 $ 463,869 $ 281,439 $ 182,430 Future 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 at June 30, 2018 to be the following: Fiscal year ending December 31 (In thousands) 2018 $ 35,112 2019 57,590 2020 42,732 2021 36,042 2022 35,266 Thereafter 154,687 $ 361,429

Income Tax (Notes)

Income Tax (Notes)	6 Months Ended
	Jun. 30, 2018
Income Tax [Abstract]
Income Tax Disclosure [Text Block]	INCOME TAX Income tax expense differs from the expected amounts based on the statutory federal tax rates for the three and six months ended June 30, 2018 and July 1, 2017 as follows: Three months ended Six months ended (In thousands) June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Expected federal income tax expense at statutory rate $ 13,467 $ 17,861 $ 28,400 $ 32,430 State income taxes before valuation allowance, net of federal tax effect 203 159 698 209 Effect of foreign source income (4,142 ) (7,273 ) (2,346 ) (10,645 ) Tax contingencies 45 406 813 535 Valuation allowance (188 ) 756 453 1,237 U.S. federal research credit (674 ) (549 ) (1,574 ) (1,148 ) Equity compensation (228 ) (497 ) (5,792 ) (2,792 ) Global intangible low tax income 835 — 1,949 — Other items, net 464 179 727 327 Income tax expense $ 9,782 $ 11,042 $ 23,328 $ 20,153 The Company’s year-to-date effective tax rate was 17.2% in 2018, compared to an effective tax rate of 21.7% during the same period in 2017. This variance reflects the benefit from the reduction in the corporate tax rate from 35% to 21% which was offset by the global intangible low tax income inclusion and various discrete items. The effective tax rate in 2017 reflects a greater concentration in the Company's geographic composition of income toward jurisdictions with lower tax rates. On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act of 2017 (the "Tax Cuts and Jobs Act") which makes broad and complex changes to the U.S. tax code. The Company calculated its best estimate of the impact of the Tax Cuts and Jobs Act in its 2017 year-end income tax provision in accordance with its understanding of the Tax Cuts and Jobs Act and guidance available as of the date of the filing. During the fourth quarter of fiscal 2017, the Company recorded a provisional net charge using reasonable estimates based on analysis and information available to date for the tax effects related to the remeasurement of deferred taxes, the deemed repatriation transition tax, accelerated depreciation, and the deductibility of certain executive compensation. This provisional net charge is subject to revisions as the Company completes its analysis of the Tax Cuts and Jobs Act, collects and prepares necessary data, and interprets any additional guidance issued by the U.S. Treasury Department, Internal Revenue Service, Financial Accounting Standards Board, and other standard setting and regulatory bodies. Adjustments may materially impact the provision for income taxes and effective tax rate in the period in which the adjustments are made. As of June 30, 2018, the Company has not finalized its accounting for the tax effects of these items. The Company expects to complete its analysis of these provisional items when the necessary information becomes available to accurately analyze and compute in reasonable detail under ASC Topic 740. The Company estimates such analysis will be completed in the second half of 2018. The Tax Cuts and Jobs Act also has provisions that impact the Company’s 2018 results, most notably a reduction in the corporate income tax rate from 35% to 21% for tax years beginning after December 31, 2017. The U.S. tax law changes also (1) repeals the deduction for domestic production activities , (2) establishes a global intangible low tax income (GILTI) regime, (3) creates a base erosion anti-avoidance tax (BEAT), (4) establishes new limitations on deductible interest expense and certain executive compensation, (5) eliminates the corporate alternative minimum tax, (6) generally eliminates U.S. federal income taxes on dividends from foreign subsidiaries and (7) changes the rules related to uses and limitations of net operating loss carryforwards created in tax years beginning after December 31, 2017. Global Intangible Low Taxed Income 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 $0.8 million and $1.9 million in the three and six months ended June 30, 2018, respectively.

Earnings Per Common Share

Earnings Per Common Share	6 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Earnings Per Common Share	EARNINGS PER COMMON SHARE The following table presents a reconciliation of the denominators used in the computation of basic and diluted earnings per common share (EPS): Three months ended Six months ended (In thousands) June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Basic—weighted common shares outstanding 141,701 141,696 141,641 141,599 Weighted common shares assumed upon exercise of stock options and vesting of restricted common stock 1,537 1,812 1,804 1,812 Diluted—weighted common shares and common shares equivalent outstanding 143,238 143,508 143,445 143,411 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 three and six months ended June 30, 2018 and July 1, 2017 : Three months ended Six months ended (In thousands) June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Shares excluded from calculations of diluted EPS 298 338 231 269

Fair Value

Fair Value	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value	FAIR VALUE Financial Assets Measured at Fair Value on a Recurring Basis The following table presents the Company’s financial assets that are measured at fair value on a recurring basis at June 30, 2018 and December 31, 2017 . Level 1 inputs are based on quoted prices in active markets accessible at the reporting date for identical assets and liabilities. Level 2 inputs are based on quoted prices for similar instruments in active markets and quoted prices for identical or similar instruments in markets that are not active, or model-based valuation techniques for which all significant assumptions are observable in a market. Level 3 inputs are based on prices or valuations that require inputs that are significant to the valuation and are unobservable. June 30, 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) $ — $ 631 $ — $ 631 $ — $ 36 $ — $ 36 Total assets measured and recorded at fair value $ — $ 631 $ — $ 631 $ — $ 36 $ — $ 36 (a) Based on observable market transactions of spot currency rates and forward currency 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 June 30, 2018 and December 31, 2017 condensed consolidated balance sheets to the net fair value that could have been reported in the respective condensed consolidated balance sheets is as follows: June 30, 2018 December 31, 2017 (In thousands) Gross Gross Net amount of Gross amounts of recognized assets Gross amounts offset in the condensed consolidated balance sheet Net amount of assets in the condensed consolidated balance sheet Foreign currency contracts $ 631 $ — $ 631 $ 36 $ — $ 36 Gain (losses) associated with derivatives are recorded in other expense, net, in the condensed consolidated statements of operations. Gain (losses) associated with derivative instruments not designated as hedging instruments were as follows: Three months ended Six months ended (In thousands) June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Gain (losses) on foreign currency contracts $ 631 $ 183 $ (1,283 ) $ (2,114 )

Segment Reporting

Segment Reporting	6 Months Ended
	Jun. 30, 2018
Segment Reporting [Abstract]
Segment Reporting	SEGMENT REPORTING 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 has changed its definition of segment profit. Segment profit is now defined as net sales less direct and indirect 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 the Company's corporate functions as well as interest expense, amortization of intangible assets and income tax expense. Prior quarter information was recast to reflect the change in the Company's definition of segment profit. Summarized financial information for the Company’s reportable segments is shown in the following tables. Three months ended Six months ended (In thousands) June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Net sales SCEM $ 134,336 $ 121,174 $ 265,079 $ 235,609 MC 124,681 104,407 243,318 204,462 AMH 124,042 103,421 241,861 206,308 Total net sales $ 383,059 $ 329,002 $ 750,258 $ 646,379 Three months ended Six months ended (In thousands) June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Segment profit SCEM $ 37,316 $ 29,060 $ 68,878 $ 52,188 MC 39,054 31,796 81,045 62,783 AMH 23,114 15,169 46,256 29,129 Total segment profit $ 99,484 $ 76,025 $ 196,179 $ 144,100 The following table reconciles total segment profit to income before income taxes: Three months ended Six months ended (In thousands) June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Total segment profit $ 99,484 $ 76,025 $ 196,179 $ 144,100 Less: Amortization of intangible assets 12,014 11,007 23,683 21,952 Unallocated general and administrative expenses 12,537 5,928 19,090 12,138 Operating income 74,933 59,090 153,406 110,010 Interest expense 8,296 8,196 16,455 16,669 Interest income (1,371 ) (93 ) (2,304 ) (173 ) Other expense (income), net 3,877 (46 ) 4,016 856 Income before income tax expense $ 64,131 $ 51,033 $ 135,239 $ 92,658 In the following tables, revenue is disaggregated by country or region for the three and six months ended June 30, 2018 and July 1, 2017. (In thousands) Three months ended June 30, 2018 Six months ended June 30, 2018 SCEM MC AMH Total SCEM MC AMH Total Taiwan $ 26,575 $ 23,572 $ 17,280 $ 67,427 $ 54,217 $ 46,104 $ 32,197 $ 132,518 United States 34,128 20,272 29,466 83,866 66,529 41,047 62,555 170,131 South Korea 20,791 19,982 23,961 64,734 41,118 39,805 46,549 127,472 Japan 14,060 28,545 12,079 54,684 28,566 54,537 23,111 106,214 China 16,726 15,753 14,319 46,798 31,706 29,057 26,530 87,293 Europe 7,970 10,406 17,553 35,929 15,766 20,090 32,960 68,816 Southeast Asia 14,086 6,151 9,384 29,621 27,177 12,678 17,959 57,814 $ 134,336 $ 124,681 $ 124,042 $ 383,059 $ 265,079 $ 243,318 $ 241,861 $ 750,258 (In thousands) Three months ended July 1, 2017 Six months ended July 1, 2017 SCEM MC AMH Total SCEM MC AMH Total Taiwan $ 28,018 $ 28,912 $ 19,446 $ 76,376 $ 55,465 $ 61,106 $ 37,937 $ 154,508 United States 28,766 17,216 24,965 70,947 57,384 32,486 46,866 136,736 South Korea 18,507 15,043 18,448 51,998 36,288 28,387 34,646 99,321 Japan 10,602 21,132 8,958 40,692 18,594 39,264 18,278 76,136 China 17,735 9,786 6,983 34,504 31,154 17,955 14,580 63,689 Europe 7,316 6,391 15,075 28,782 15,328 13,764 30,637 59,729 Southeast Asia 10,230 5,927 9,546 25,703 21,396 11,500 23,364 56,260 $ 121,174 $ 104,407 $ 103,421 $ 329,002 $ 235,609 $ 204,462 $ 206,308 $ 646,379

Summary of Significant Accoun16

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2018
Nature of Operations	Nature of Operations Entegris, Inc. (“Entegris”, “the Company”, “us”, “we”, or “our”)
Principles of Consolidation	Principles of Consolidation The condensed 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 The preparation of condensed consolidated financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, particularly receivables, inventories, property, plant and equipment, goodwill, intangibles, accrued expenses, and income taxes and related accounts, and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Basis of Presentation	Basis of Presentation The condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States and contain all adjustments considered necessary, and are of a normal recurring nature, to present fairly the financial position as of June 30, 2018 and December 31, 2017 , and the results of operations and comprehensive income for the three and six months ended June 30, 2018 and July 1, 2017 , and cash flows for the six months ended June 30, 2018 and July 1, 2017 . The condensed consolidated financial statements and accompanying notes are presented as permitted by Form 10-Q and do not contain certain information included in the Company’s annual consolidated financial statements and notes. The information included in this Form 10-Q should be read in conjunction with Management’s Discussion and Analysis and consolidated financial statements and notes thereto included in the Company’s Form 10-K for the year ended December 31, 2017 . The results of operations for the three and six months ended June 30, 2018 are not necessarily indicative of the results to be expected for the full year.
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 items. The fair value of long-term debt, including current maturities, was $622.8 million at June 30, 2018 , compared to the carrying amount of long-term debt, including current maturities, of $650.2 million .
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.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Adopted in 2018 In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 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 condensed consolidated financial statements for further details. Recent Accounting Pronouncements Yet to be Adopted In February 2016, the FASB issued ASU No. 2016-02, Leases . ASU No. 2016-02 requires the identification of arrangements that should be accounted for as leases by lessees. In general, for lease arrangements exceeding a twelve-month term, these arrangements must now be recognized as assets and liabilities on the balance sheet of the lessee. Under ASU No. 2016-02, a right-of-use asset and lease obligation will be recorded for all leases, whether operating or financing, while the income statement will reflect lease expense for operating leases, and amortization and interest expense for financing leases. The balance sheet amount recorded for existing leases at the date of adoption of ASU No. 2016-02 must be calculated using the applicable incremental borrowing rate at the date of adoption. In addition, ASU No. 2016-02 requires the use of the modified retrospective method, which will require adjustment to all comparative periods presented in the consolidated financial statements. ASU No. 2016-02 is effective beginning January 1, 2019. The Company is currently assessing the impact that adopting this new accounting standard will have on its consolidated financial statements and disclosures, and the timing of adoption.

Revenues (Tables)

Revenues (Tables)	6 Months Ended
	Jun. 30, 2018
Revenues [Abstract]
Revenue, Initial Application Period Cumulative Effect Transition [Table Text Block]	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)

Acquisition Acquisition (Tables

Acquisition Acquisition (Tables)	6 Months Ended
	Jun. 30, 2018
SPG
Business Acquisition [Line Items]
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	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): Accounts receivable $ 15,805 Inventory 46,073 Other current assets 424 Property, plant and equipment 7,345 Identifiable intangible assets 178,220 Other noncurrent assets 398 Current liabilities (26,196 ) Deferred tax liabilities (42,110 ) Other noncurrent liabilities (1,006 ) Net assets acquired 178,953 Goodwill 162,251 Total purchase price, net of cash acquired $ 341,204
Business Acquisition, Pro Forma Information [Table Text Block]	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. Three months ended Six months ended (In thousands, except per share data) (Unaudited) June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Net sales $ 405,404 $ 352,430 $ 803,955 $ 693,295 Net income 67,699 43,336 130,625 60,865 Per share amounts: Net income per common share - basic $ 0.48 $ 0.31 $ 0.92 $ 0.43 Net income per common share - diluted 0.47 0.30 0.91 0.42
PSS
Business Acquisition [Line Items]
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	The following table summarizes the preliminary allocation of the purchase price to the fair values assigned to the assets acquired and liabilities assumed at the date of acquisition: (In thousands): Amount Accounts receivable $ 3,898 Inventory 1,827 Other current assets 23 Property, plant and equipment 103 Other noncurrent assets 3 Identifiable intangible assets 25,600 Accounts payables (310 ) Accrued expenses (2,667 ) Net assets acquired 28,477 Goodwill 8,820 Total purchase price $ 37,297

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Jun. 30, 2018
Inventory Disclosure [Abstract]
Inventories	Inventories consist of the following: (In thousands) June 30, 2018 December 31, 2017 Raw materials $ 87,086 $ 58,226 Work-in process 38,677 16,193 Finished goods 139,595 123,670 Total inventories $ 265,358 $ 198,089

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2018
Schedule of Goodwill	Goodwill activity for each period was as follows: (In thousands) Specialty Chemicals and Engineered Materials Micro-contamination Control Advanced Materials Handling Total December 31, 2017 $ 304,270 8,007 $ 47,411 $ 359,688 Addition due to acquisitions — 162,251 10,381 172,632 Foreign currency translation (2,387 ) — — (2,387 ) June 30, 2018 $ 301,883 $ 170,258 $ 57,792 $ 529,933
Schedule of Acquired Finite-Lived Intangible Assets by Major Class	Identifiable intangible assets at June 30, 2018 and December 31, 2017 consist of the following: June 30, 2018 (In thousands) Gross carrying Amount Accumulated amortization Net carrying value Developed technology $ 246,610 $ 162,432 $ 84,178 Trademarks and trade names 25,655 14,059 11,596 Customer relationships 367,723 119,049 248,674 Other 25,857 8,876 16,981 $ 665,845 $ 304,416 $ 361,429 December 31, 2017 (In thousands) Gross carrying amount Accumulated amortization Net carrying value Developed technology $ 206,224 $ 149,215 $ 57,009 Trademarks and trade names 16,807 13,712 3,095 Customer relationships 220,806 110,281 110,525 Other 20,032 8,231 11,801 $ 463,869 $ 281,439 $ 182,430
Estimated Future Amortization Expense	Future 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 at June 30, 2018 to be the following: Fiscal year ending December 31 (In thousands) 2018 $ 35,112 2019 57,590 2020 42,732 2021 36,042 2022 35,266 Thereafter 154,687 $ 361,429

Income Tax (Tables)

Income Tax (Tables)	6 Months Ended
	Jun. 30, 2018
Income Tax [Abstract]
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	Income tax expense differs from the expected amounts based on the statutory federal tax rates for the three and six months ended June 30, 2018 and July 1, 2017 as follows: Three months ended Six months ended (In thousands) June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Expected federal income tax expense at statutory rate $ 13,467 $ 17,861 $ 28,400 $ 32,430 State income taxes before valuation allowance, net of federal tax effect 203 159 698 209 Effect of foreign source income (4,142 ) (7,273 ) (2,346 ) (10,645 ) Tax contingencies 45 406 813 535 Valuation allowance (188 ) 756 453 1,237 U.S. federal research credit (674 ) (549 ) (1,574 ) (1,148 ) Equity compensation (228 ) (497 ) (5,792 ) (2,792 ) Global intangible low tax income 835 — 1,949 — Other items, net 464 179 727 327 Income tax expense $ 9,782 $ 11,042 $ 23,328 $ 20,153

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	6 Months Ended
	Jun. 30, 2018
Reconcilation of Share Amount Used in Computaion of Basic and Diluted Earnings Per Share (EPS)	The following table presents a reconciliation of the denominators used in the computation of basic and diluted earnings per common share (EPS): Three months ended Six months ended (In thousands) June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Basic—weighted common shares outstanding 141,701 141,696 141,641 141,599 Weighted common shares assumed upon exercise of stock options and vesting of restricted common stock 1,537 1,812 1,804 1,812 Diluted—weighted common shares and common shares equivalent outstanding 143,238 143,508 143,445 143,411
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 three and six months ended June 30, 2018 and July 1, 2017 : Three months ended Six months ended (In thousands) June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Shares excluded from calculations of diluted EPS 298 338 231 269

Fair Value (Tables)

Fair Value (Tables)	6 Months Ended
	Jun. 30, 2018
Financial Assets Measured At Fair Value On Recurring Basis	The following table presents the Company’s financial assets that are measured at fair value on a recurring basis at June 30, 2018 and December 31, 2017 . Level 1 inputs are based on quoted prices in active markets accessible at the reporting date for identical assets and liabilities. Level 2 inputs are based on quoted prices for similar instruments in active markets and quoted prices for identical or similar instruments in markets that are not active, or model-based valuation techniques for which all significant assumptions are observable in a market. Level 3 inputs are based on prices or valuations that require inputs that are significant to the valuation and are unobservable. June 30, 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) $ — $ 631 $ — $ 631 $ — $ 36 $ — $ 36 Total assets measured and recorded at fair value $ — $ 631 $ — $ 631 $ — $ 36 $ — $ 36 (a) Based on observable market transactions of spot currency rates and forward currency rates on equivalently-termed instruments.
Information about Derivative Positions	A reconciliation of the net fair value of foreign currency contract assets and liabilities subject to master netting arrangements that are recorded in the June 30, 2018 and December 31, 2017 condensed consolidated balance sheets to the net fair value that could have been reported in the respective condensed consolidated balance sheets is as follows: June 30, 2018 December 31, 2017 (In thousands) Gross Gross Net amount of Gross amounts of recognized assets Gross amounts offset in the condensed consolidated balance sheet Net amount of assets in the condensed consolidated balance sheet Foreign currency contracts $ 631 $ — $ 631 $ 36 $ — $ 36
Gains and (losses) associated with derivatives	osses) associated with derivatives are recorded in other expense, net, in the condensed consolidated statements of operations. Gain (losses) associated with derivative instruments not designated as hedging instruments were as follows: Three months ended Six months ended (In thousands) June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Gain (losses) on foreign currency contracts $ 631 $ 183 $ (1,283 ) $ (2,114 )

Segment Reporting (Tables)

Segment Reporting (Tables)	6 Months Ended
	Jun. 30, 2018
Summary of Financial Information for Reportable Segments	Summarized financial information for the Company’s reportable segments is shown in the following tables. Three months ended Six months ended (In thousands) June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Net sales SCEM $ 134,336 $ 121,174 $ 265,079 $ 235,609 MC 124,681 104,407 243,318 204,462 AMH 124,042 103,421 241,861 206,308 Total net sales $ 383,059 $ 329,002 $ 750,258 $ 646,379 Three months ended Six months ended (In thousands) June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Segment profit SCEM $ 37,316 $ 29,060 $ 68,878 $ 52,188 MC 39,054 31,796 81,045 62,783 AMH 23,114 15,169 46,256 29,129 Total segment profit $ 99,484 $ 76,025 $ 196,179 $ 144,100
Reconciliation of Total Segment Profit to Operating Income	The following table reconciles total segment profit to income before income taxes: Three months ended Six months ended (In thousands) June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Total segment profit $ 99,484 $ 76,025 $ 196,179 $ 144,100 Less: Amortization of intangible assets 12,014 11,007 23,683 21,952 Unallocated general and administrative expenses 12,537 5,928 19,090 12,138 Operating income 74,933 59,090 153,406 110,010 Interest expense 8,296 8,196 16,455 16,669 Interest income (1,371 ) (93 ) (2,304 ) (173 ) Other expense (income), net 3,877 (46 ) 4,016 856 Income before income tax expense $ 64,131 $ 51,033 $ 135,239 $ 92,658
Schedule of Revenue from External Customers, by Geographical Areas [Table Text Block]	In the following tables, revenue is disaggregated by country or region for the three and six months ended June 30, 2018 and July 1, 2017. (In thousands) Three months ended June 30, 2018 Six months ended June 30, 2018 SCEM MC AMH Total SCEM MC AMH Total Taiwan $ 26,575 $ 23,572 $ 17,280 $ 67,427 $ 54,217 $ 46,104 $ 32,197 $ 132,518 United States 34,128 20,272 29,466 83,866 66,529 41,047 62,555 170,131 South Korea 20,791 19,982 23,961 64,734 41,118 39,805 46,549 127,472 Japan 14,060 28,545 12,079 54,684 28,566 54,537 23,111 106,214 China 16,726 15,753 14,319 46,798 31,706 29,057 26,530 87,293 Europe 7,970 10,406 17,553 35,929 15,766 20,090 32,960 68,816 Southeast Asia 14,086 6,151 9,384 29,621 27,177 12,678 17,959 57,814 $ 134,336 $ 124,681 $ 124,042 $ 383,059 $ 265,079 $ 243,318 $ 241,861 $ 750,258 (In thousands) Three months ended July 1, 2017 Six months ended July 1, 2017 SCEM MC AMH Total SCEM MC AMH Total Taiwan $ 28,018 $ 28,912 $ 19,446 $ 76,376 $ 55,465 $ 61,106 $ 37,937 $ 154,508 United States 28,766 17,216 24,965 70,947 57,384 32,486 46,866 136,736 South Korea 18,507 15,043 18,448 51,998 36,288 28,387 34,646 99,321 Japan 10,602 21,132 8,958 40,692 18,594 39,264 18,278 76,136 China 17,735 9,786 6,983 34,504 31,154 17,955 14,580 63,689 Europe 7,316 6,391 15,075 28,782 15,328 13,764 30,637 59,729 Southeast Asia 10,230 5,927 9,546 25,703 21,396 11,500 23,364 56,260 $ 121,174 $ 104,407 $ 103,421 $ 329,002 $ 235,609 $ 204,462 $ 206,308 $ 646,379

Summary of Significant Accoun25

Summary of Significant Accounting Policies Additional details (Details) $ in Thousands	Jun. 30, 2018USD ($)
Accounting Policies [Abstract]
Long-term Debt, Fair Value	$ 622,756
Long-term Debt	$ 650,223

Revenues (Details)

Revenues (Details) $ in Thousands	Jan. 01, 2018USD ($)
Accounts Receivable [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 765
Inventories [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	(223)
Accrued Liabilities [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	1,276
Deferred tax liability [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	(144)
Retained Earnings [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ (590)

Acquisition Purchase Price Allo

Acquisition Purchase Price Allocation (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 25, 2018	Jan. 22, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Goodwill	$ 529,933			$ 359,688
SPG
Business Acquisition [Line Items]
Accounts Receivables		$ 15,805
Inventory		46,073
Other current assets		424
Property, Plant, and Equipment		7,345
Other noncurrent assets		398
Identifiable Intangible Assets		178,220
Current liabilities		(26,196)
Deferred tax liabilities		(42,110)
Other noncurrent liabilities		(1,006)
Net Assets Acquired		178,953
Goodwill		162,251
Total Purchase Price		$ 341,204
PSS
Business Acquisition [Line Items]
Accounts Receivables			$ 3,898
Inventory			1,827
Other current assets			23
Property, Plant, and Equipment			103
Other noncurrent assets			3
Identifiable Intangible Assets			25,600
Accounts Payable			310
Current liabilities			(2,667)
Net Assets Acquired			28,477
Goodwill			8,820
Total Purchase Price			$ 37,297

Acquisition Proforma Informatio

Acquisition Proforma Information (Details) - SPG - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Business Acquisition [Line Items]
Net sales	$ 405,404	$ 352,430	$ 803,955	$ 693,295
Net income	$ 67,699	$ 43,336	$ 130,625	$ 60,865
Net income per common share - basic	$ 0.48	$ 0.31	$ 0.92	$ 0.43
Net income per common share - diluted	$ 0.47	$ 0.30	$ 0.91	$ 0.42

Acquisition Additional Acquisit

Acquisition Additional Acquisition (Details) - USD ($) $ in Thousands	Jun. 26, 2018	Jun. 25, 2018	Jan. 22, 2018	Jun. 30, 2018	Jun. 30, 2018	Jul. 01, 2017	Dec. 31, 2017
Business Acquisition [Line Items]
Total Purchase Price					$ 380,225	$ 20,000
Goodwill				$ 529,933	529,933		$ 359,688
SPG
Business Acquisition [Line Items]
Inventory		$ 46,073
Inventory fair value step-up		$ 10,200
Amortization of Inventory Step-up				200	200
Business Acquisition, Date of Acquisition Agreement		Jun. 25, 2018
Total Purchase Price		$ 352,500
Goodwill		$ 162,251
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		13 years 10 months
Identifiable Intangible Assets		$ 178,220
Payments to Acquire Businesses, Net of Cash Acquired		$ 341,200
Business Acquisition, Transaction Costs				$ 4,800	$ 4,800
PSS
Business Acquisition [Line Items]
Inventory			$ 1,827
Business Acquisition, Date of Acquisition Agreement			Jan. 22, 2018
Total Purchase Price			$ 37,297
Goodwill			$ 8,820
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			9 years 5 months
Identifiable Intangible Assets			$ 25,600
Flex
Business Acquisition [Line Items]
Business Acquisition, Date of Acquisition Agreement	Jun. 26, 2018
Total Purchase Price	$ 1,900
Customer Relationships [Member] | SPG
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		15 years
Identifiable Intangible Assets		$ 148,200
Technology-Based Intangible Assets [Member] | SPG
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		9 years
Identifiable Intangible Assets		$ 17,900
Trade Names [Member] | SPG
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		10 years
Identifiable Intangible Assets		$ 6,700
Other Intangible Assets [Member] | SPG
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		1 year
Identifiable Intangible Assets		$ 5,500

Inventories (Detail)

Inventories (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Raw materials	$ 87,086	$ 58,226
Work-in process	38,677	16,193
Finished goods	139,595	123,670
Total inventories	$ 265,358	$ 198,089

Goodwill Rollforward (Details)

Goodwill Rollforward (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018USD ($)
Goodwill [Line Items]
Goodwill - Beginning	$ 359,688
Addition due to acquisition	172,632
Foreign currency translation	(2,387)
Goodwill - End	529,933
Specialty Chemicals and Electronic Materials SCEM [Member]
Goodwill [Line Items]
Goodwill - Beginning	304,270
Addition due to acquisition	0
Foreign currency translation	(2,387)
Goodwill - End	301,883
Microcontamination Control [Member]
Goodwill [Line Items]
Goodwill - Beginning	8,007
Addition due to acquisition	162,251
Foreign currency translation	0
Goodwill - End	170,258
Advanced Materials Handling AMH [Member]
Goodwill [Line Items]
Goodwill - Beginning	47,411
Addition due to acquisition	10,381
Foreign currency translation	0
Goodwill - End	$ 57,792

Intangible Assets (Detail)

Intangible Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets
Gross carrying Amount	$ 665,845	$ 463,869
Accumulated amortization	304,416	281,439
Net carrying value	361,429	182,430
Developed Technology
Finite-Lived Intangible Assets
Gross carrying Amount	246,610	206,224
Accumulated amortization	162,432	149,215
Net carrying value	84,178	57,009
Trademarks and Trade names
Finite-Lived Intangible Assets
Gross carrying Amount	25,655	16,807
Accumulated amortization	14,059	13,712
Net carrying value	11,596	3,095
Customer Relationships [Member]
Finite-Lived Intangible Assets
Gross carrying Amount	367,723	220,806
Accumulated amortization	119,049	110,281
Net carrying value	248,674	110,525
Other Intangible Assets [Member]
Finite-Lived Intangible Assets
Gross carrying Amount	25,857	20,032
Accumulated amortization	8,876	8,231
Net carrying value	$ 16,981	$ 11,801

Goodwill and Intangible Asset33

Goodwill and Intangible Assets Estimated Future Amortization Expense (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets
2,018	$ 35,112
2,019	57,590
2,020	42,732
2,021	36,042
2,022	35,266
Thereafter	154,687
Intangible assets, net	$ 361,429	$ 182,430

Income Tax Rate reconciliation

Income Tax Rate reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Income Tax [Abstract]
Expected federal income tax expense at statutory rate	$ 13,467	$ 17,861	$ 28,400	$ 32,430
State income taxes before valuation allowance, net of federal tax effect	203	159	698	209
Effect of foreign source income	(4,142)	(7,273)	(2,346)	(10,645)
Tax contingencies	45	406	813	535
Valuation allowance	(188)	756	453	1,237
U.S. federal research credit	(674)	(549)	(1,574)	(1,148)
Equity compensation	(228)	(497)	(5,792)	(2,792)
Global Intangible Low Tax Income	835	0	1,949	0
Other items, net	464	179	727	327
Income tax expense	$ 9,782	$ 11,042	$ 23,328	$ 20,153

Income Tax Additional Details (

Income Tax Additional Details (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent			17.20%	21.70%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%	35.00%
Global Intangible Low Tax Income	$ 835	$ 0	$ 1,949	$ 0

Reconciliation of Share Amount

Reconciliation of Share Amount Used in Computation of Basic and Diluted Earnings Per Share (EPS) (Detail) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Weighted shares outstanding:
Basic-weighted common shares outstanding	141,701	141,696	141,641	141,599
Weighted common shares assumed upon exercise of stock options and vesting of restricted common stock	1,537	1,812	1,804	1,812
Diluted-weighted common shares and common shares equivalent outstanding	143,238	143,508	143,445	143,411

Shares Excluded Underlying Stoc

Shares Excluded Underlying Stock Based Award from Calucations of Diluted EPS (Detail) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from calculations of diluted EPS	298	338	231	269

Fair Value (Details)

Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts, asset	$ 631	$ 36
Total assets measured and recorded at fair value	631	36
Other Current Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts, asset	631	36
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured and recorded at fair value	0	0
Fair Value, Inputs, Level 1 | Other Current Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts, asset	0	0
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured and recorded at fair value	631	36
Fair Value, Inputs, Level 2 | Other Current Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts, asset	631	36
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured and recorded at fair value	0	0
Fair Value, Inputs, Level 3 | Other Current Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts, asset	$ 0	$ 0

Information about Derivative Po

Information about Derivative Positions (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Derivative [Line Items]
Gross amounts of recognized assets	$ 631	$ 36
Gross amounts of recognized liabilities	0	0
Net amount of assets	$ 631	$ 36

Fair Value Losses associated wi

Fair Value Losses associated with derivatives (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Fair Value Disclosures [Abstract]
Gain (losses) on foreign currency contracts	$ 631	$ 183	$ (1,283)	$ (2,114)

Summary of Financial Informatio

Summary of Financial Information for Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Segment Reporting Information [Line Items]
Net Sales	$ 383,059	$ 329,002	$ 750,258	$ 646,379
Total Segment Profit	99,484	76,025	196,179	144,100
Specialty Chemicals and Electronic Materials SCEM [Member]
Segment Reporting Information [Line Items]
Net Sales	134,336	121,174	265,079	235,609
Total Segment Profit	37,316	29,060	68,878	52,188
Microcontamination Control [Member]
Segment Reporting Information [Line Items]
Net Sales	124,681	104,407	243,318	204,462
Total Segment Profit	39,054	31,796	81,045	62,783
Advanced Materials Handling AMH [Member]
Segment Reporting Information [Line Items]
Net Sales	124,042	103,421	241,861	206,308
Total Segment Profit	23,114	15,169	46,256	29,129
TAIWAN, PROVINCE OF CHINA
Segment Reporting Information [Line Items]
Net Sales	67,427	76,376	132,518	154,508
TAIWAN, PROVINCE OF CHINA | Specialty Chemicals and Electronic Materials SCEM [Member]
Segment Reporting Information [Line Items]
Net Sales	26,575	28,018	54,217	55,465
TAIWAN, PROVINCE OF CHINA | Microcontamination Control [Member]
Segment Reporting Information [Line Items]
Net Sales	23,572	28,912	46,104	61,106
TAIWAN, PROVINCE OF CHINA | Advanced Materials Handling AMH [Member]
Segment Reporting Information [Line Items]
Net Sales	17,280	19,446	32,197	37,937
UNITED STATES
Segment Reporting Information [Line Items]
Net Sales	83,866	70,947	170,131	136,736
UNITED STATES | Specialty Chemicals and Electronic Materials SCEM [Member]
Segment Reporting Information [Line Items]
Net Sales	34,128	28,766	66,529	57,384
UNITED STATES | Microcontamination Control [Member]
Segment Reporting Information [Line Items]
Net Sales	20,272	17,216	41,047	32,486
UNITED STATES | Advanced Materials Handling AMH [Member]
Segment Reporting Information [Line Items]
Net Sales	29,466	24,965	62,555	46,866
KOREA, REPUBLIC OF
Segment Reporting Information [Line Items]
Net Sales	64,734	51,998	127,472	99,321
KOREA, REPUBLIC OF | Specialty Chemicals and Electronic Materials SCEM [Member]
Segment Reporting Information [Line Items]
Net Sales	20,791	18,507	41,118	36,288
KOREA, REPUBLIC OF | Microcontamination Control [Member]
Segment Reporting Information [Line Items]
Net Sales	19,982	15,043	39,805	28,387
KOREA, REPUBLIC OF | Advanced Materials Handling AMH [Member]
Segment Reporting Information [Line Items]
Net Sales	23,961	18,448	46,549	34,646
JAPAN
Segment Reporting Information [Line Items]
Net Sales	54,684	40,692	106,214	76,136
JAPAN | Specialty Chemicals and Electronic Materials SCEM [Member]
Segment Reporting Information [Line Items]
Net Sales	14,060	10,602	28,566	18,594
JAPAN | Microcontamination Control [Member]
Segment Reporting Information [Line Items]
Net Sales	28,545	21,132	54,537	39,264
JAPAN | Advanced Materials Handling AMH [Member]
Segment Reporting Information [Line Items]
Net Sales	12,079	8,958	23,111	18,278
CHINA
Segment Reporting Information [Line Items]
Net Sales	46,798	34,504	87,293	63,689
CHINA | Specialty Chemicals and Electronic Materials SCEM [Member]
Segment Reporting Information [Line Items]
Net Sales	16,726	17,735	31,706	31,154
CHINA | Microcontamination Control [Member]
Segment Reporting Information [Line Items]
Net Sales	15,753	9,786	29,057	17,955
CHINA | Advanced Materials Handling AMH [Member]
Segment Reporting Information [Line Items]
Net Sales	14,319	6,983	26,530	14,580
Europe [Member]
Segment Reporting Information [Line Items]
Net Sales	35,929	28,782	68,816	59,729
Europe [Member] | Specialty Chemicals and Electronic Materials SCEM [Member]
Segment Reporting Information [Line Items]
Net Sales	7,970	7,316	15,766	15,328
Europe [Member] | Microcontamination Control [Member]
Segment Reporting Information [Line Items]
Net Sales	10,406	6,391	20,090	13,764
Europe [Member] | Advanced Materials Handling AMH [Member]
Segment Reporting Information [Line Items]
Net Sales	17,553	15,075	32,960	30,637
Southeast Asia [Member]
Segment Reporting Information [Line Items]
Net Sales	29,621	25,703	57,814	56,260
Southeast Asia [Member] | Specialty Chemicals and Electronic Materials SCEM [Member]
Segment Reporting Information [Line Items]
Net Sales	14,086	10,230	27,177	21,396
Southeast Asia [Member] | Microcontamination Control [Member]
Segment Reporting Information [Line Items]
Net Sales	6,151	5,927	12,678	11,500
Southeast Asia [Member] | Advanced Materials Handling AMH [Member]
Segment Reporting Information [Line Items]
Net Sales	$ 9,384	$ 9,546	$ 17,959	$ 23,364

Reconciliation of Total Segment

Reconciliation of Total Segment Profit to Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Profit	$ 99,484	$ 76,025	$ 196,179	$ 144,100
Amortization	12,014	11,007	23,683	21,952
Unallocated General And Administrative Expenses	12,537	5,928	19,090	12,138
Operating income	74,933	59,090	153,406	110,010
Interest expense	8,296	8,196	16,455	16,669
Interest income	(1,371)	(93)	(2,304)	(173)
Other income, net	3,877	(46)	4,016	856
Income before income tax expense	$ 64,131	$ 51,033	$ 135,239	$ 92,658