Advanced Energy Industries (AEIS) 10-Q 31 Oct 17 2017 Q3 Quarterly report Financial data

Document and Enitity Informatio

Document and Enitity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 26, 2017
Document Entity Information [Abstract]
Entity Registrant Name	ADVANCED ENERGY INDUSTRIES INC
Entity Central Index Key	927,003
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Amendment Flag	false
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		39,657,315

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
CURRENT ASSETS:
Cash and cash equivalents	$ 366,572	$ 281,953
Marketable securities	3,046	4,737
Accounts receivable, net of allowances of $2,232 and $1,943, respectively	74,993	75,667
Inventories	73,520	55,770
Income taxes receivable	6,380	1,482
Other current assets	8,678	9,324
Current assets of discontinued operations	7,770	9,401
Total current assets	540,959	438,334
Deposits and other assets	2,432	1,835
Property and equipment, net	15,736	13,337
Goodwill	53,509	42,125
Finite-Lived Intangible Assets, Net	34,435	28,071
Deferred income tax assets	58,590	32,197
Non-current assets of discontinued operations	15,630	15,630
TOTAL ASSETS	721,291	571,529
CURRENT LIABILITIES:
Accounts payable	41,275	46,255
Income taxes payable	9	1,778
Accrued payroll and employee benefits	16,241	13,230
Customer deposits	5,410	5,774
Other accrued expenses	18,394	14,590
Current liabilities of discontinued operations	9,667	13,419
Total current liabilities	90,996	95,046
LONG-TERM LIABILITIES:
Deferred income tax liabilities	2,049	1,008
Uncertain tax positions	4,383	2,538
Long term deferred revenue	36,528	39,170
Other long-term liabilities	22,662	20,536
Non-current liabilities of discontinued operations	16,287	21,157
Total liabilities	172,905	179,455
STOCKHOLDERS' EQUITY:
Preferred stock, $0.001 par value, 1,000 shares authorized, none issued and outstanding	0	0
Common stock, $0.001 par value, 70,000 shares authorized; 39,624 and 39,712 issued and outstanding, respectively	40	40
Additional paid-in capital	187,407	203,603
Retained earnings	362,815	195,364
Accumulated other comprehensive loss	(1,876)	(6,933)
Total stockholders’ equity	548,386	392,074
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 721,291	$ 571,529

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets Parenthetical - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accounts receivable, allowances	$ 2,232	$ 1,943
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	1,000	1,000
Preferred stock, shares issued (in shares)	0	0
Preferred Stock, Shares Outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	70,000,000	70,000,000
Common stock, shares issued (in shares)	39,624,000	39,712,000
Common stock, shares outstanding (in shares)	39,624,000	39,712,000

Condensed Consolidated Statemen

Condensed Consolidated Statement of Operations Statement - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Sales Revenue, Goods, Net	$ 152,363	$ 107,650	$ 424,478	$ 294,695
Sales Revenue, Services, Net	24,212	18,902	67,320	53,666
Total sales	176,575	126,552	491,798	348,361
Cost of Goods Sold	72,146	49,835	198,754	137,984
Cost of Services	12,195	10,594	34,838	28,748
Total cost of sales	84,341	60,429	233,592	166,732
Gross profit	92,234	66,123	258,206	181,629
Research and development	14,629	11,293	41,742	33,324
Selling, general and administrative	24,692	19,421	70,580	56,814
Amortization of intangible assets	1,240	1,048	3,176	3,180
Total operating expenses	40,561	31,762	115,498	93,318
Operating income	51,673	34,361	142,708	88,311
Other (expense) income, net	153	(55)	(3,138)	1,138
Income from continuing operations, before income taxes	51,826	34,306	139,570	89,449
Provision (benefit) for income taxes	(31,968)	5,268	(25,538)	12,937
Income from continuing operations, net of income taxes	83,794	29,038	165,108	76,512
Income from discontinued operations, net of income taxes	70	1,323	2,343	6,661
Net income	$ 83,864	$ 30,361	$ 167,451	$ 83,173
Basic weighted-average common shares outstanding	39,786	39,681	39,787	39,723
Diluted weighted-average common shares outstanding	40,172	39,967	40,207	40,015
Income (Loss) from Continuing Operations, Per Basic Share	$ 2.11	$ 0.73	$ 4.15	$ 1.93
Income (Loss) from Continuing Operations, Per Diluted Share	2.09	0.73	4.11	1.91
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0	0.03	0.06	0.17
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0	0.03	0.06	0.17
Earnings Per Share, Basic	2.11	0.77	4.21	2.09
Earnings Per Share, Diluted	$ 2.09	$ 0.76	$ 4.16	$ 2.08

Condensed Consolidated Stateme5

Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net Income (Loss) Attributable to Parent	$ 83,864	$ 30,361	$ 167,451	$ 83,173
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	807	1,125	5,333	1,389
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	(1)	(1)	(22)	9
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	100	16	254	40
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 84,570	$ 31,469	$ 172,508	$ 84,531

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 167,451	$ 83,173
Income from discontinued operations, net of income taxes	2,343	6,661
Income from continuing operations, net of income taxes	165,108	76,512
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	6,792	5,938
Stock-based compensation expense	10,707	4,299
Provision for deferred income taxes	(26,185)	0
Loss on foreign exchange hedge	3,489	0
Net loss on disposal of assets	(106)	(259)
Changes in operating assets and liabilities, net of assets acquired:
Accounts receivable	4,119	(13,679)
Inventories	(15,062)	(5,261)
Other current assets	(430)	(73)
Accounts payable	(5,725)	10,619
Other current liabilities and accrued expenses	3,763	1,489
Income taxes	(6,375)	2,562
Net cash provided by operating activities from continuing operations	140,307	82,665
Net cash used in operating activities from discontinued operations	(7,293)	(4,538)
Net cash provided by operating activities	133,014	78,127
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of marketable securities	(86)	(745)
Proceeds from sale of marketable securities	1,883	7,161
Acquisition, net of cash acquired	(17,347)	0
Purchase of foreign exchange hedge	(3,489)	0
Purchases of property and equipment	(5,646)	(4,524)
Net cash (used in) provided by investing activities from continuing operations	(24,685)	1,892
Net cash used in investing activities from discontinued operations	0	0
Net cash (used in) provided by investing activities	(24,685)	1,892
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase and retirement of common stock	24,998	0
Net (payments) proceeds related to stock-based award activities	(1,904)	1,753
Other financing activities	2	(3)
Net cash (used in) provided by financing activities from continuing operations	(26,900)	1,750
Net cash used in financing activities from discontinued operations	0	(24)
Net cash (used in) provided by financing activities	(26,900)	1,726
EFFECT OF CURRENCY TRANSLATION ON CASH	1,138	(550)
INCREASE IN CASH AND CASH EQUIVALENTS	82,567	81,195
CASH AND CASH EQUIVALENTS, beginning of period	289,517	169,720
CASH AND CASH EQUIVALENTS, end of period	372,084	250,915
Less cash and cash equivalents from discontinued operations	5,512	6,623
CASH AND CASH EQUIVALENTS FROM CONTINUING OPERATIONS, end of period	366,572	244,292
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest	27	173
Cash paid for income taxes	4,599	4,930
Cash received for refunds of income taxes	1,153	444
Cash held in banks outside the United States	$ 271,777	$ 176,815

Operations and Summary of Signi

Operations and Summary of Significant Accounting Policies and Estimates	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Basis of Presentation	BASIS OF PRESENTATION Advanced Energy Industries, Inc., a Delaware corporation, and its wholly-owned subsidiaries ("we," "us," "our," "Advanced Energy," or the "Company") design, manufacture, sell, and support power conversion products that transform electrical power into various usable forms. Our products enable manufacturing processes that use thin films for various products, such as semiconductor devices, flat panel displays, solar cells, architectural glass, optical coating and decorative and functional coating for consumer products. We also supply thermal instrumentation products for advanced temperature control in the thin film process for these same markets. Our power control modules provide power control solutions for industrial applications where heat treatment and processing are used such as glass manufacturing, metal fabrication and treatment, and material and chemical processing. Our high voltage power supplies and modules are used in applications such as semiconductor ion implantation, scanning electron microscopy, chemical analysis such as mass spectrometry and various applications using X-ray technology and electron guns for both analytical and processing applications. Our network of global service support centers provides a recurring revenue opportunity as we offer repair services, conversions, upgrades, and refurbishments and sales of used equipment to companies using our products. As of December 31, 2015, we discontinued the production, engineering, and sales of our solar inverter product line. As such, all solar inverter revenues, costs, assets and liabilities are reported in Discontinued Operations for all periods presented herein. See Note 3. Discontinued Operations. In the opinion of management, the accompanying Unaudited Condensed Consolidated Financial Statements contain all adjustments, consisting of normal, recurring adjustments, necessary to present fairly the financial position of the Company as of September 30, 2017 , the results of our operations for the three and nine months ended September 30, 2017 and 2016 , and cash flows for the nine months ended September 30, 2017 and 2016 . The Unaudited Condensed Consolidated Financial Statements included herein have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC"). Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") have been condensed or omitted pursuant to such rules and regulations. These Unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and Notes thereto contained in our Annual Report on Form 10-K for the fiscal year ended December 31, 2016 and other financial information filed with the SEC. ESTIMATES AND ASSUMPTIONS The preparation of our Unaudited Condensed Consolidated Financial Statements in conformity with U.S. GAAP requires us to make estimates, assumptions and judgments that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. We believe that the significant estimates, assumptions, and judgments when accounting for items and matters such as allowances for doubtful accounts, excess and obsolete inventory, warranty reserves, acquisitions, asset valuations, goodwill, asset life, depreciation, amortization, recoverability of assets, impairments, deferred revenue, stock option and restricted stock grants, taxes, and other provisions are reasonable, based upon information available at the time they are made. Actual results may differ from these estimates. CRITICAL ACCOUNTING POLICIES Our accounting policies are described in our audited Consolidated Financial Statements and Notes contained in our Annual Report on Form 10-K for the year ended December 31, 2016 . NEW ACCOUNTING STANDARDS From time to time, the Financial Accounting Standards Board ("FASB") or other standards setting bodies issue new accounting pronouncements. Updates to the FASB Accounting Standards Codification (“ASC”) are communicated through issuance of an Accounting Standards Update (“ASU”). Unless otherwise discussed, we believe that the impact of recently issued guidance, whether adopted or to be adopted in the future, is not expected to have a material impact on the Consolidated Financial Statements upon adoption. In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers" and has subsequently issued several supplemental and/or clarifying ASUs (collectively known as "ASC 606"). ASC 606 implements a five step model for how an entity should recognize revenue in order to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This guidance will be effective for fiscal periods beginning after December 15, 2017 and for the interim periods within that year. Advanced Energy has established a cross-functional implementation team to analyze its current portfolio of customer contracts. We have completed the disaggregation of the related sales order data and have begun testing contract elements and considering supporting software applications. The implementation team is also responsible for identifying and implementing changes to existing business processes, controls, and systems in order to support revenue recognition and disclosure under the new standard. Based on our preliminary review of our customer contracts, we expect that revenue with the majority of our customers will continue to be recognized at a point in time, generally upon shipment of products, consistent with our current revenue recognition model. Upon adoption of ASC 606, however, we also believe some of our revenue from sales of products to customers will be recognized in advance of actual customer billing, (for example: just in time inventory programs) due to the terms of certain customer contracts. As such, various balance sheet line items will be impacted. Advanced Energy believes the adoption of ASC606 will have an impact on both the timing of revenue recognition and various line items within the Consolidated Balance Sheet. The standard permits the use of either the retrospective or cumulative effect transition method. Our team is continuing to evaluate the impact that the adoption will have on our Consolidated Financial Statements and related disclosures. We have not yet selected a transition method nor have we determined the effect of the standard on our ongoing reporting. In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)," to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within the year of adoption. Early adoption is permitted. Advanced Energy is currently assessing and has not yet determined the impact ASU 2016-02 may have on its Consolidated Financial Statements. In October 2016, the FASB issued ASU 2016-16, “Accounting for Income Taxes: Intra-Entity Asset Transfers of Assets Other than Inventory.” ASU 2016-16 changes the timing of income tax recognition for an intercompany sale of assets. ASU 2016-16 requires the seller’s tax effects and the buyer’s deferred taxes to be recognized immediately upon the sale instead of deferring accounting for the income tax implications until the assets are sold to a third party or recovered through use. ASU 2016-16 is effective for fiscal years beginning after December 15, 2017 including interim periods within the year of adoption. Modified retrospective adoption is required with any cumulative-effect adjustment recorded to retained earnings as of the beginning of the period of adoption. Early adoption is allowed but only if adopted in the first quarter of fiscal year 2017. Advanced Energy is currently assessing the impact of ASU 2016-16 adoption and while it has not completed the assessment, it has determined the impact of ASU 2016-16 adoption will require the recognition of deferred tax assets totaling approximately $18 million to $22 million with a corresponding increase to Retained Earnings in its Consolidated Financial Statements upon adoption.

Business Acquisition (Notes)

Business Acquisition (Notes)	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
BUSINESS ACQUISITION	BUSINESS ACQUISITION On July 3, 2017, Advanced Energy acquired all of the issued and outstanding shares of capital stock of Excelsys Holdings Limited (“Excelsys”), an electronics manufacturer in Cork, Ireland. This acquisition is part of Advanced Energy’s strategy to continue to grow and diversify its revenue through organic and inorganic opportunities. The high-efficiency, configurable power supplies that Excelsys manufactures for medical and industrial applications will further enhance Advanced Energy’s product portfolio. The components of the fair value of the total consideration transferred for the Excelsys acquisition are as follows: Cash paid to owners $ 18,512 Cash acquired (1,165 ) Total fair value of consideration transferred $ 17,347 The following table summarizes estimated fair values of the assets acquired and liabilities assumed as of July 3, 2017: Accounts receivable $ 1,930 Inventories 1,048 Income taxes receivable 558 Other current assets 47 Property and equipment 256 Deferred income tax asset 35 Accounts payable (1,342 ) Income taxes payable (34 ) Other accrued expenses (719 ) Deferred income tax liabilities (946 ) 833 Amortizable intangible assets: Tradename 182 Customer relationships 1,595 Technology 5,808 Total amortizable intangible assets 7,585 Total identifiable net assets 8,418 Goodwill 8,929 Total fair value of consideration transferred $ 17,347 A summary of the intangible assets acquired, amortization method and estimated useful lives as of July 3, 2017 follows : Amount Amortization Method Useful Life Tradename $ 182 Straight-line 5 Customer relationships 1,595 Straight-line 10 Technology 5,808 Straight-line 10 $ 7,585 Goodwill and intangible assets are recorded in the functional currency of the entity and are subject to changes due to translation at each balance sheet date. The goodwill associated with the acquisition is the result of expected synergies and expansion of the technology into adjacent markets we already serve. Advanced Energy is in the process of finalizing the assessment of fair value for the assets acquired and liabilities assumed.

Discontinued Operations (Notes)

Discontinued Operations (Notes)	9 Months Ended
	Sep. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]	DISCONTINUED OPERATIONS In December 2015, we completed the wind down of engineering, manufacturing and sales of our solar inverter product line (the "inverter business"). Accordingly, the results of our inverter business have been reflected as “Income from discontinued operations, net of income taxes” on our Unaudited Condensed Consolidated Statements of Operations for all periods presented herein. The effect of extended inverter warranty sales to our customers continues to be reflected in deferred revenue in our Unaudited Condensed Consolidated Balance Sheets. Deferred revenue for extended inverter warranties and the associated costs of warranty service will be reflected in Sales and Cost of goods sold, respectively, from continuing operations in future periods in our Consolidated Statement of Operations, as the deferred revenue is earned and the associated services are rendered. Extended warranties related to the inverter product line are no longer offered. The items included in "Income from discontinued operations, net of income taxes" are as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Sales $ — $ — $ — $ — Cost of sales 944 3,095 47 672 Total operating income (including restructuring) (441 ) (1,473 ) (1,587 ) (3,759 ) Operating income (loss) from discontinued operations (503 ) (1,622 ) 1,540 3,087 Other income (loss) (86 ) (14 ) 291 325 Income (loss) from discontinued operations before income taxes (589 ) (1,636 ) 1,831 3,412 Provision (benefit) for income taxes (659 ) (2,959 ) (512 ) (3,249 ) Income from discontinued operations, net of income taxes $ 70 $ 1,323 $ 2,343 $ 6,661 Assets and Liabilities of discontinued operations within the Condensed Consolidated Balance Sheets are comprised of the following: September 30, December 31, 2017 2016 Cash and cash equivalents $ 5,512 $ 7,564 Accounts and other receivables, net 1,372 1,670 Inventories 886 167 Current assets of discontinued operations $ 7,770 $ 9,401 Other assets $ 70 $ 70 Deferred income tax assets 15,560 15,560 Non-current assets of discontinued operations $ 15,630 $ 15,630 Accounts payable and other accrued expenses $ 988 $ 3,684 Accrued warranty 8,675 9,254 Accrued restructuring 4 481 Current liabilities of discontinued operations $ 9,667 $ 13,419 Accrued warranty $ 16,054 $ 20,976 Other liabilities 233 181 Non-current liabilities of discontinued operations $ 16,287 $ 21,157

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2017
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The following table sets out the tax expense and the effective tax rate for our income from continuing operations: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Income from continuing operations before income taxes $ 51,826 $ 34,306 $ 139,570 $ 89,449 Provision (benefit) for income taxes (31,968 ) 5,268 (25,538 ) 12,937 Effective tax rate (61.7 )% 15.4 % (18.3 )% 14.5 % The effective tax rates for the three and nine months ended September 30, 2017 differ from the federal statutory rate of 35% due to the benefit of earnings in foreign jurisdictions which are subject to lower tax rates as well as the recognition of excess tax benefits attributable to stock based compensation as a component of tax expense in accordance with ASU 2016-09 “Improvements to Employee Share-Based Payment Accounting” which was implemented in December 2016. In addition, after several attempts by the company to sell its remaining solar businesses, management elected to liquidate its U.S. solar business during the three months ended September 30, 2017 and has accordingly recognized a tax benefit of $40.2 million for a worthless stock tax deduction. The effective tax rates for the three and nine months ended September 30, 2016 differ from the federal statutory rate of 35% primarily due to the benefit of the earnings in foreign jurisdictions which are subject to lower tax rates. Our policy is to classify accrued interest and penalties related to unrecognized tax benefits in our income tax provision. The amount of interest and penalties accrued related to our unrecognized tax benefits for the three months ended September 30, 2017 and 2016 was $0.1 million , and for the nine months ended September 30, 2017 and 2016 was $0.2 million and $0.3 million , respectively.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS PER SHARE Basic earnings per share ("EPS") is computed by dividing income available to common stockholders by the weighted-average number of common shares outstanding during the period. The computation of our diluted EPS is similar to the computation of our basic EPS except that the denominator is increased to include the number of additional common shares that would have been outstanding (using the if-converted and treasury stock methods), if our outstanding stock options and restricted stock units had been converted to common shares, and if such assumed conversion is dilutive. The following is a reconciliation of the weighted-average shares outstanding used in the calculation of basic and diluted EPS for the three and nine months ended September 30, 2017 and 2016 : Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Income from continuing operations, net of income taxes $ 83,794 $ 29,038 $ 165,108 $ 76,512 Basic weighted-average common shares outstanding 39,786 39,681 39,787 39,723 Assumed exercise of dilutive stock options and restricted stock units 386 286 420 292 Diluted weighted-average common shares outstanding 40,172 39,967 40,207 40,015 Continuing operations: Basic earnings per share $ 2.11 $ 0.73 $ 4.15 $ 1.93 Diluted earnings per share $ 2.09 $ 0.73 $ 4.11 $ 1.91 The following restricted stock units were excluded in the computation of diluted earnings per share because they were anti-dilutive: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Restricted stock units — 1 1 1 Stock Buyback In September 2015, our Board of Directors authorized a program to repurchase up to $150.0 million of our stock over a thirty-month period. In August 2017, we entered into a Fixed Dollar Share Repurchase Agreement to repurchase $25.0 million of shares of our common stock in the open market. A total of 351,292 shares of our common stock was repurchased under the Share Repurchase Agreement at an average price of $71.16 per share. All share repurchases were executed in the open market, and no shares were repurchased from related parties. The $25.0 million share repurchase was recognized as a reduction to Additional paid-in capital. Repurchased shares were retired and assumed the status of authorized and unissued shares. As of September 30, 2017 , we had $75.0 million remaining for the authorized repurchase of shares.

Marketable Securities

Marketable Securities	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Marketable Securities	MARKETABLE SECURITIES AND ASSETS MEASURED AT FAIR VALUE Our investments with original maturities of more than three months at time of purchase and that are intended to be held for no more than 12 months, are considered marketable securities available for sale. Our marketable securities consist of certificates of deposit. The relative cost and fair value of our marketable securities are as follows: September 30, 2017 December 31, 2016 Cost Fair Value Cost Fair Value Total marketable securities $ 3,044 $ 3,046 $ 4,735 $ 4,737 The maturities of our marketable securities available for sale as of September 30, 2017 are as follows: Earliest Latest Certificates of deposit 10/10/2017 to 7/28/2018 The value and liquidity of the marketable securities we hold are affected by market conditions, as well as the ability of the issuers of such securities to make principal and interest payments when due, and the functioning of the markets in which these securities are traded. As of September 30, 2017 , we do not believe any of the underlying issuers of our marketable securities are at risk of default. The following tables present information about the fair value hierarchy used to measure our marketable securities at fair value, on a recurring basis, as of September 30, 2017 and December 31, 2016 . We did not have any financial liabilities measured at fair value, on a recurring basis, as of September 30, 2017 and December 31, 2016 . September 30, 2017 Level 1 Level 2 Level 3 Total Total marketable securities $ — $ 3,046 $ — $ 3,046 December 31, 2016 Level 1 Level 2 Level 3 Total Total marketable securities $ — $ 4,737 $ — $ 4,737 There were no transfers in or out of Level 1, 2, or 3 fair value measurements during the three and nine months ended September 30, 2017 .

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE FINANCIAL INSTRUMENTS	DERIVATIVE FINANCIAL INSTRUMENTS We are impacted by changes in foreign currency exchange rates. We attempt to mitigate these risks through the use of derivative financial instruments, primarily forward currency exchange rate contracts. During the three and nine months ended September 30, 2017 and 2016 , we entered into currency exchange rate forward contracts to attempt to mitigate the exchange rate risk associated with intercompany debt denominated in nonfunctional currencies. These derivative instruments are not designated as hedges for accounting purposes; however, they tend to offset the fluctuations of our intercompany debt due to foreign currency exchange rate changes. These forward contracts are typically for one month periods. At September 30, 2017 , we had one outstanding Euro forward contract.We did not have any currency exchange rate contracts outstanding as of December 31, 2016 . The notional amount of the exchange contracts at September 30, 2017 was $10.6 million and the fair value of these contracts was not significant at September 30, 2017 . During the three and nine months ended September 30, 2017 and 2016 the gains and losses recorded related to the foreign currency exchange contracts are as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Loss from foreign currency exchange contracts $ (469 ) $ — $ (1,096 ) $ (569 ) These losses were offset by corresponding gains and losses on the revaluation of the underlying intercompany debt and both are included as a component of Other (expense) income, net , in our Unaudited Condensed Consolidated Statements of Operations. During the first quarter of 2017 we entered into a foreign currency exchange rate forward contract at a cost of $3.5 million , to mitigate the exchange rate risk associated with a planned offshore acquisition which was not consummated. This derivative instrument was designated as a hedge for accounting purposes. The hedge expired upon maturity in the first quarter of 2017. The cost of the forward contract is recorded as a component of Other (expense) income, net in our Condensed Consolidated Statement of Operations.

Inventories

Inventories	9 Months Ended
	Sep. 30, 2017
Inventory Disclosure [Abstract]
INVENTORIES	INVENTORIES Our inventories are valued at the lower of cost or market and computed on a first-in, first-out (FIFO) basis. Components of Inventories are as follows: September 30, December 31, 2017 2016 Parts and raw materials $ 52,991 $ 43,278 Work in process 8,901 5,292 Finished goods 11,628 7,200 Inventories $ 73,520 $ 55,770

Property and Equipment

Property and Equipment	9 Months Ended
	Sep. 30, 2017
Property, Plant and Equipment [Abstract]
PROPERTY AND EQUIPMENT	PROPERTY AND EQUIPMENT Property and equipment are as follows: September 30, December 31, 2017 2016 Buildings and land $ 1,656 $ 1,581 Machinery and equipment 35,270 32,743 Computer and communication equipment 26,452 24,637 Furniture and fixtures 1,379 1,267 Vehicles 340 357 Leasehold improvements 16,538 15,546 Construction in process 1,072 644 82,707 76,775 Less: Accumulated depreciation (66,971 ) (63,438 ) Property and equipment, net $ 15,736 $ 13,337 Depreciation expense included in our income from continuing operations, is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Depreciation expense $ 1,333 $ 845 $ 3,616 $ 2,758

Goodwill

Goodwill	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL	GOODWILL The following summarizes the changes in goodwill during the nine months ended September 30, 2017 : September 30, 2017 Additions Effect of Changes in Exchange Rates December 31, 2016 Goodwill $ 53,509 $ 8,929 $ 2,455 $ 42,125

Intangible Assets

Intangible Assets	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
INTANGIBLE ASSETS	INTANGIBLE ASSETS Intangible assets subject to amortization consisted of the following as of September 30, 2017 and December 31, 2016: September 30, 2017 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Technology-based $ 18,537 $ (5,082 ) $ 13,455 Customer relationships 29,865 (10,012 ) 19,853 Trademarks and other 2,601 (1,474 ) 1,127 Total amortizable intangibles $ 51,003 $ (16,568 ) $ 34,435 December 31, 2016 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Technology-based $ 11,643 $ (3,673 ) $ 7,970 Customer relationships 26,608 (7,451 ) 19,157 Trademarks and other 2,223 (1,279 ) 944 Total amortizable intangibles $ 40,474 $ (12,403 ) $ 28,071 Amortization expense for our intangible assets included in our income from continuing operations is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Amortization expense $ 1,240 $ 1,048 $ 3,176 $ 3,180 Amortization expense related to intangible assets for each of the five years 2017 (remaining) through 2021 and thereafter is as follows: Year Ending December 31, 2017 (remaining) $ 1,180 2018 4,842 2019 4,825 2020 4,146 2021 4,043 Thereafter 15,399 $ 34,435

Warranties

Warranties	9 Months Ended
	Sep. 30, 2017
Product Warranties Disclosures [Abstract]
WARRANTIES	WARRANTIES Provisions of our sales agreements include customary product warranties, ranging from 12 months to 24 months following shipment. The estimated cost of warranties is recorded when revenue is recognized and is based upon historical experience by product, configuration and geographic region. We establish accruals for our warranty obligations that are probable to result in future costs. The warranty accrual is included in our Other accrued expenses in our balance sheet. Changes in our product warranty accrual were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Balances at beginning of period $ 3,933 $ 1,933 $ 2,329 $ 1,633 Increases to accruals 333 789 2,722 1,726 Warranty expenditures (439 ) (197 ) (1,236 ) (811 ) Effect of changes in exchange rates 6 (8 ) 18 (31 ) Balances at end of period $ 3,833 $ 2,517 $ 3,833 $ 2,517

Pension Liability (Notes)

Pension Liability (Notes)	9 Months Ended
	Sep. 30, 2017
Retirement Benefits [Abstract]
Pension and Other Postretirement Benefits Disclosure [Text Block]	PENSION LIABILITY In connection with the HiTek acquisition on April 12, 2014, we acquired the HiTek Power Limited Pension Scheme ("HPLPS"). The HPLPS has been closed to new participants and additional accruals since 2006. In order to measure the expense and related benefit obligation, various assumptions are made including discount rates used to value the obligation, expected return on plan assets used to fund these expenses and estimated future inflation rates. These assumptions are based on historical experience as well as current facts and circumstances. An actuarial analysis is used to measure the expense and liability associated with pension benefits. We are committed to make annual fixed payments of $0.9 million into the HPLPS through April 30, 2024, and then $1.8 million from May 1, 2024 through November 30, 2033. The net pension liability is included in Other long-term liabilities in our balance sheet as follows: September 30, December 31, 2017 2016 Pension liability $ 20,353 $ 18,836 The components of the net periodic pension expense for the three and nine months ended September 30, 2017 and 2016 were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Net periodic (benefit) expense: Expected return on plan assets $ (128 ) $ (121 ) $ (394 ) $ (385 ) Interest cost 242 235 742 747 Amortization of actuarial gains and losses 64 80 197 255 Net periodic expense $ 178 $ 194 $ 545 $ 617

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
STOCK-BASED COMPENSATION	STOCK-BASED COMPENSATION On May 4, 2017, the shareholders approved the Company's 2017 Omnibus Incentive Plan ("the 2017 Plan") and all shares that were then available for issuance under the 2008 Omnibus Incentive Plan are now available for issuance under the 2017 Plan. We have reserved a total of 4,936,598 shares of Advanced Energy’s common stock for issuance under the 2017 Plan. The 2017 Plan provides for the grant of stock options, stock appreciation rights, restricted stock, stock units (including deferred stock units), unrestricted stock, and dividend equivalent rights. Any of the awards issued under the 2017 Plan may be issued as performance based awards to align compensation awards to the attainment of annual or long-term performance goals. As of September 30, 2017 , there were 4,189,179 shares available for grant under the 2017 Plan. Stock option awards are granted with an exercise price equal to the market price of our stock at the date of grant and have either a time based vesting schedule of three or four years , or a performance based vesting schedule based upon achievement of organizational performance goals over a three year period, and a term of 10 years . The fair value of each award was estimated on the date of grant using the Black-Scholes-Merton option pricing model. Restricted stock units (“RSU’s”) are granted with either a time based vesting schedule of three or four years , or a performance based vesting schedule based upon achievement of organizational performance goals over a three year period. The fair value of each RSU is determined based upon the closing fair market value of our common stock on the grant date. We recognize stock-based compensation expense based on the fair value of the awards issued and the functional area of the employee receiving the award. Stock-based compensation for the three and nine months ended September 30, 2017 and 2016 is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Stock-based compensation expense $ 3,453 $ 1,301 $ 10,707 $ 4,299 A summary of activity for stock option awards during the three and nine months ended September 30, 2017 is as follows: Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 Number of Options Weighted-Average Exercise Price per Share Number of Options Weighted-Average Exercise Price per Share Options outstanding at beginning of period 375 $ 17.95 474 $ 17.47 Options exercised (20 ) $ 14.58 (114 ) $ 15.35 Options forfeited — $ — (5 ) $ 18.19 Options outstanding at end of period 355 $ 18.14 355 $ 18.14 A summary of activity for RSU awards for the three and nine months ended September 30, 2017 is as follows: Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 Number of RSUs Weighted-Average Grant Date Fair Value Number of RSUs Weighted- Average Grant Date Fair Value RSUs outstanding at beginning of period 411 $ 49.56 354 $ 29.60 RSUs granted 2 $ 74.56 250 $ 63.59 RSUs vested (20 ) $ 28.99 (205 ) $ 30.60 RSUs forfeited (1 ) $ 34.12 (7 ) $ 31.73 RSUs outstanding at end of period 392 $ 50.71 392 $ 50.71

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES We have firm purchase commitments and agreements with various suppliers to ensure the availability of components. The obligation as of September 30, 2017 is approximately $95.5 million . Our policy with respect to all purchase commitments is to record losses, if any, when they are probable and reasonably estimable. We continuously monitor these commitments for exposure to potential losses and will record a provision for losses when it is deemed necessary. We are involved in disputes and legal actions arising in the normal course of our business. There have been no material developments in legal proceedings in which we are involved during the nine months ended September 30, 2017 .

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2017
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	RELATED PARTY TRANSACTIONS Members of our Board of Directors hold various executive positions and serve as directors at other companies, including companies that are our customers. Sales to our related party customers for the three and nine months ended September 30, 2017 and 2016 were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Sales to related parties $ 648 $ 673 $ 1,255 $ 896 Number of related party customers 1 2 1 3 Our accounts receivable balance from related party customers with outstanding balances as of September 30, 2017 and December 31, 2016 was as follows: September 30, December 31, 2017 2016 Accounts receivable from related parties $ 277 $ — Number of related party customers 1 —

Geographic and Customer Informa

Geographic and Customer Information Geographic and Customer Information (Notes)	9 Months Ended
	Sep. 30, 2017
Segment Reporting Information [Line Items]
Segment Reporting Disclosure [Text Block]	SIGNIFICANT CUSTOMER INFORMATION The following table summarizes sales, and percentages of sales, by customers that individually accounted for 10% or more of our sales for the three and nine months ended September 30, 2017 and 2016 : Three Months Ended September 30, 2017 % of Total Sales 2016 % of Total Sales Applied Materials, Inc. $ 50,078 28.4 % $ 45,806 36.2 % LAM Research 46,315 26.2 % 24,305 19.2 % Nine Months Ended September 30, 2017 % of Total Sales 2016 % of Total Sales Applied Materials, Inc. $ 165,239 33.6 % $ 118,364 34.0 % LAM Research 114,325 23.2 % 73,319 21.0 % The following table summarizes the accounts receivable balances, and percentages of the total accounts receivable, for customers that individually accounted for 10% or more of accounts receivable as of September 30, 2017 and December 31, 2016 : September 30, December 31, 2017 2016 Applied Materials, Inc. $ 32,681 43.6 % $ 31,078 41.1 % LAM Research 3,550 4.7 % 14,317 18.9 % Our sales to Applied Materials, Inc. and LAM Research include precision power products used in semiconductor processing and solar and flat panel display. No other customer accounted for 10% or more of our sales or accounts receivable balances during these periods.

Commitments and Contingencies C

Commitments and Contingencies Commitments and Contingencies (Policies)	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Our policy with respect to all purchase commitments is to record losses, if any, when they are probable and reasonably estimable.

Business Acquisition (Tables)

Business Acquisition (Tables)	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition	The components of the fair value of the total consideration transferred for the Excelsys acquisition are as follows: Cash paid to owners $ 18,512 Cash acquired (1,165 ) Total fair value of consideration transferred $ 17,347
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes estimated fair values of the assets acquired and liabilities assumed as of July 3, 2017: Accounts receivable $ 1,930 Inventories 1,048 Income taxes receivable 558 Other current assets 47 Property and equipment 256 Deferred income tax asset 35 Accounts payable (1,342 ) Income taxes payable (34 ) Other accrued expenses (719 ) Deferred income tax liabilities (946 ) 833 Amortizable intangible assets: Tradename 182 Customer relationships 1,595 Technology 5,808 Total amortizable intangible assets 7,585 Total identifiable net assets 8,418 Goodwill 8,929 Total fair value of consideration transferred $ 17,347
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination	A summary of the intangible assets acquired, amortization method and estimated useful lives as of July 3, 2017 follows : Amount Amortization Method Useful Life Tradename $ 182 Straight-line 5 Customer relationships 1,595 Straight-line 10 Technology 5,808 Straight-line 10 $ 7,585

Discontinued Operations (Tables

Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Groups, Including Discontinued Operations [Table Text Block]	The items included in "Income from discontinued operations, net of income taxes" are as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Sales $ — $ — $ — $ — Cost of sales 944 3,095 47 672 Total operating income (including restructuring) (441 ) (1,473 ) (1,587 ) (3,759 ) Operating income (loss) from discontinued operations (503 ) (1,622 ) 1,540 3,087 Other income (loss) (86 ) (14 ) 291 325 Income (loss) from discontinued operations before income taxes (589 ) (1,636 ) 1,831 3,412 Provision (benefit) for income taxes (659 ) (2,959 ) (512 ) (3,249 ) Income from discontinued operations, net of income taxes $ 70 $ 1,323 $ 2,343 $ 6,661 Assets and Liabilities of discontinued operations within the Condensed Consolidated Balance Sheets are comprised of the following: September 30, December 31, 2017 2016 Cash and cash equivalents $ 5,512 $ 7,564 Accounts and other receivables, net 1,372 1,670 Inventories 886 167 Current assets of discontinued operations $ 7,770 $ 9,401 Other assets $ 70 $ 70 Deferred income tax assets 15,560 15,560 Non-current assets of discontinued operations $ 15,630 $ 15,630 Accounts payable and other accrued expenses $ 988 $ 3,684 Accrued warranty 8,675 9,254 Accrued restructuring 4 481 Current liabilities of discontinued operations $ 9,667 $ 13,419 Accrued warranty $ 16,054 $ 20,976 Other liabilities 233 181 Non-current liabilities of discontinued operations $ 16,287 $ 21,157

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Schedule of tax expense and the effective tax rate for our income from continuing operations	The following table sets out the tax expense and the effective tax rate for our income from continuing operations: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Income from continuing operations before income taxes $ 51,826 $ 34,306 $ 139,570 $ 89,449 Provision (benefit) for income taxes (31,968 ) 5,268 (25,538 ) 12,937 Effective tax rate (61.7 )% 15.4 % (18.3 )% 14.5 %

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Reconciliation of the weighted-average shares outstanding used in the calculation of basic and diluted EPS	The following is a reconciliation of the weighted-average shares outstanding used in the calculation of basic and diluted EPS for the three and nine months ended September 30, 2017 and 2016 : Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Income from continuing operations, net of income taxes $ 83,794 $ 29,038 $ 165,108 $ 76,512 Basic weighted-average common shares outstanding 39,786 39,681 39,787 39,723 Assumed exercise of dilutive stock options and restricted stock units 386 286 420 292 Diluted weighted-average common shares outstanding 40,172 39,967 40,207 40,015 Continuing operations: Basic earnings per share $ 2.11 $ 0.73 $ 4.15 $ 1.93 Diluted earnings per share $ 2.09 $ 0.73 $ 4.11 $ 1.91
Schedule of stock options and restricted units were excluded in the computation of diluted earnings per share because they were anti-dilutive	The following restricted stock units were excluded in the computation of diluted earnings per share because they were anti-dilutive: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Restricted stock units — 1 1 1

Marketable Securities (Tables)

Marketable Securities (Tables)	9 Months Ended
	Sep. 30, 2017
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	The following tables present information about the fair value hierarchy used to measure our marketable securities at fair value, on a recurring basis, as of September 30, 2017 and December 31, 2016 . We did not have any financial liabilities measured at fair value, on a recurring basis, as of September 30, 2017 and December 31, 2016 . September 30, 2017 Level 1 Level 2 Level 3 Total Total marketable securities $ — $ 3,046 $ — $ 3,046 December 31, 2016 Level 1 Level 2 Level 3 Total Total marketable securities $ — $ 4,737 $ — $ 4,737
The composition of our marketable securities	Our marketable securities consist of certificates of deposit. The relative cost and fair value of our marketable securities are as follows: September 30, 2017 December 31, 2016 Cost Fair Value Cost Fair Value Total marketable securities $ 3,044 $ 3,046 $ 4,735 $ 4,737
The maturities of our marketable securities available for sale	The maturities of our marketable securities available for sale as of September 30, 2017 are as follows: Earliest Latest Certificates of deposit 10/10/2017 to 7/28/2018

Derivative Financial Instrume30

Derivative Financial Instruments Gains and Losses related to Foreign Currency Contracts (Tables)	9 Months Ended
	Sep. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) [Table Text Block]	During the three and nine months ended September 30, 2017 and 2016 the gains and losses recorded related to the foreign currency exchange contracts are as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Loss from foreign currency exchange contracts $ (469 ) $ — $ (1,096 ) $ (569 )

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2017
Inventory Disclosure [Abstract]
Components of inventories	Our inventories are valued at the lower of cost or market and computed on a first-in, first-out (FIFO) basis. Components of Inventories are as follows: September 30, December 31, 2017 2016 Parts and raw materials $ 52,991 $ 43,278 Work in process 8,901 5,292 Finished goods 11,628 7,200 Inventories $ 73,520 $ 55,770

Property and Equipment (Tables)

Property and Equipment (Tables)	9 Months Ended
	Sep. 30, 2017
Property, Plant and Equipment [Abstract]
Details of property and equipment	Property and equipment are as follows: September 30, December 31, 2017 2016 Buildings and land $ 1,656 $ 1,581 Machinery and equipment 35,270 32,743 Computer and communication equipment 26,452 24,637 Furniture and fixtures 1,379 1,267 Vehicles 340 357 Leasehold improvements 16,538 15,546 Construction in process 1,072 644 82,707 76,775 Less: Accumulated depreciation (66,971 ) (63,438 ) Property and equipment, net $ 15,736 $ 13,337
Depreciation expense recorded in continuing operations	Depreciation expense included in our income from continuing operations, is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Depreciation expense $ 1,333 $ 845 $ 3,616 $ 2,758

Goodwill (Tables)

Goodwill (Tables)	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of the changes in goodwill	The following summarizes the changes in goodwill during the nine months ended September 30, 2017 : September 30, 2017 Additions Effect of Changes in Exchange Rates December 31, 2016 Goodwill $ 53,509 $ 8,929 $ 2,455 $ 42,125

Intangible Assets (Tables)

Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of other intangible assets	ntangible assets subject to amortization consisted of the following as of September 30, 2017 and December 31, 2016: September 30, 2017 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Technology-based $ 18,537 $ (5,082 ) $ 13,455 Customer relationships 29,865 (10,012 ) 19,853 Trademarks and other 2,601 (1,474 ) 1,127 Total amortizable intangibles $ 51,003 $ (16,568 ) $ 34,435 December 31, 2016 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Technology-based $ 11,643 $ (3,673 ) $ 7,970 Customer relationships 26,608 (7,451 ) 19,157 Trademarks and other 2,223 (1,279 ) 944 Total amortizable intangibles $ 40,474 $ (12,403 ) $ 28,071
Schedule of amortization expense relating to other intangible assets	mortization expense for our intangible assets included in our income from continuing operations is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Amortization expense $ 1,240 $ 1,048 $ 3,176 $ 3,180
Schedule of expected future amortization expense	Amortization expense related to intangible assets for each of the five years 2017 (remaining) through 2021 and thereafter is as follows: Year Ending December 31, 2017 (remaining) $ 1,180 2018 4,842 2019 4,825 2020 4,146 2021 4,043 Thereafter 15,399 $ 34,435

Warranties (Tables)

Warranties (Tables)	9 Months Ended
	Sep. 30, 2017
Product Warranties Disclosures [Abstract]
Changes in accrued product warranties	Changes in our product warranty accrual were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Balances at beginning of period $ 3,933 $ 1,933 $ 2,329 $ 1,633 Increases to accruals 333 789 2,722 1,726 Warranty expenditures (439 ) (197 ) (1,236 ) (811 ) Effect of changes in exchange rates 6 (8 ) 18 (31 ) Balances at end of period $ 3,833 $ 2,517 $ 3,833 $ 2,517

Pension Liability (Tables)

Pension Liability (Tables)	9 Months Ended
	Sep. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Schedule of Net Funded Status [Table Text Block]	The net pension liability is included in Other long-term liabilities in our balance sheet as follows: September 30, December 31, 2017 2016 Pension liability $ 20,353 $ 18,836
Schedule of Net Benefit Costs [Table Text Block]	The components of the net periodic pension expense for the three and nine months ended September 30, 2017 and 2016 were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Net periodic (benefit) expense: Expected return on plan assets $ (128 ) $ (121 ) $ (394 ) $ (385 ) Interest cost 242 235 742 747 Amortization of actuarial gains and losses 64 80 197 255 Net periodic expense $ 178 $ 194 $ 545 $ 617

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of stock-based compensation	Stock-based compensation for the three and nine months ended September 30, 2017 and 2016 is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Stock-based compensation expense $ 3,453 $ 1,301 $ 10,707 $ 4,299
Summary of stock option activity	A summary of activity for stock option awards during the three and nine months ended September 30, 2017 is as follows: Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 Number of Options Weighted-Average Exercise Price per Share Number of Options Weighted-Average Exercise Price per Share Options outstanding at beginning of period 375 $ 17.95 474 $ 17.47 Options exercised (20 ) $ 14.58 (114 ) $ 15.35 Options forfeited — $ — (5 ) $ 18.19 Options outstanding at end of period 355 $ 18.14 355 $ 18.14
Summary of non-vested Restricted Stock Units activity	A summary of activity for RSU awards for the three and nine months ended September 30, 2017 is as follows: Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 Number of RSUs Weighted-Average Grant Date Fair Value Number of RSUs Weighted- Average Grant Date Fair Value RSUs outstanding at beginning of period 411 $ 49.56 354 $ 29.60 RSUs granted 2 $ 74.56 250 $ 63.59 RSUs vested (20 ) $ 28.99 (205 ) $ 30.60 RSUs forfeited (1 ) $ 34.12 (7 ) $ 31.73 RSUs outstanding at end of period 392 $ 50.71 392 $ 50.71

Related Party Transactions (Tab

Related Party Transactions (Tables)	9 Months Ended
	Sep. 30, 2017
Related Party Transaction [Line Items]
Schedule of related party transactions	Members of our Board of Directors hold various executive positions and serve as directors at other companies, including companies that are our customers. Sales to our related party customers for the three and nine months ended September 30, 2017 and 2016 were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Sales to related parties $ 648 $ 673 $ 1,255 $ 896 Number of related party customers 1 2 1 3 Our accounts receivable balance from related party customers with outstanding balances as of September 30, 2017 and December 31, 2016 was as follows: September 30, December 31, 2017 2016 Accounts receivable from related parties $ 277 $ — Number of related party customers 1 —

Geographic and Customer Infor39

Geographic and Customer Information (Tables)	9 Months Ended
	Sep. 30, 2017
Significant Customer Information [Abstract]
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]	The following table summarizes sales, and percentages of sales, by customers that individually accounted for 10% or more of our sales for the three and nine months ended September 30, 2017 and 2016 : Three Months Ended September 30, 2017 % of Total Sales 2016 % of Total Sales Applied Materials, Inc. $ 50,078 28.4 % $ 45,806 36.2 % LAM Research 46,315 26.2 % 24,305 19.2 % Nine Months Ended September 30, 2017 % of Total Sales 2016 % of Total Sales Applied Materials, Inc. $ 165,239 33.6 % $ 118,364 34.0 % LAM Research 114,325 23.2 % 73,319 21.0 % The following table summarizes the accounts receivable balances, and percentages of the total accounts receivable, for customers that individually accounted for 10% or more of accounts receivable as of September 30, 2017 and December 31, 2016 : September 30, December 31, 2017 2016 Applied Materials, Inc. $ 32,681 43.6 % $ 31,078 41.1 % LAM Research 3,550 4.7 % 14,317 18.9 %

Business Acquisition Considerat

Business Acquisition Consideration Transferred (Details) - Excelsys Acquisition [Member] $ in Thousands	Jul. 03, 2017USD ($)
Business Acquisition [Line Items]
Cash paid to owners	$ 18,512
Cash acquired	(1,165)
Total fair value of consideration received	$ 17,347

Business Acquisition Assets Acq

Business Acquisition Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jul. 03, 2017	Sep. 30, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill		$ 53,509	$ 42,125
Excelsys Acquisition [Member]
Business Acquisition [Line Items]
Accounts receivable	$ 1,930
Inventories	1,048
Income taxes receivable	558
Other current assets	47
Property and equipment	256
Deferred income tax asset	35
Accounts payable	(1,342)
Income taxes payable	(34)
Other accrued expenses	(719)
Deferred income tax liabilities	946
Net tangible assets acquired (liabilities) assumed	833
Amortizable intangible assets:	7,585
Total identifiable net assets	8,418
Goodwill	8,929
Total fair value of consideration received	17,347
Tradename [Member] | Excelsys Acquisition [Member]
Business Acquisition [Line Items]
Amortizable intangible assets:	182
Customer Relationships [Member] | Excelsys Acquisition [Member]
Business Acquisition [Line Items]
Amortizable intangible assets:	1,595
Technology Equipment [Member] | Excelsys Acquisition [Member]
Business Acquisition [Line Items]
Amortizable intangible assets:	$ 5,808

Business Acquisition Intangible

Business Acquisition Intangible Assets Acquired (Details) - Excelsys Acquisition [Member] $ in Thousands	Jul. 03, 2017USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets:	$ 7,585
Tradename [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets:	$ 182
Useful Life	5 years
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets:	$ 1,595
Useful Life	10 years
Technology Equipment [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets:	$ 5,808
Useful Life	10 years

Discontinued Operations Stateme

Discontinued Operations Statement of Operations for Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales	$ 0	$ 0	$ 0	$ 0
Cost of sales	944	3,095	47	672
Total operating income (including restructuring)	(441)	(1,473)	(1,587)	(3,759)
Operating income (loss) from discontinued operations	(503)	(1,622)	1,540	3,087
Other income (loss)	(86)	(14)
Other income (loss)			291	325
Provision (benefit) for income taxes	(589)	(1,636)	1,831	3,412
Provision (benefit) for income taxes	(659)	(2,959)	(512)	(3,249)
Income from discontinued operations, net of income taxes	$ 70	$ 1,323	$ 2,343	$ 6,661

Discontinued Operations Assets

Discontinued Operations Assets and Liabilities of Discontinued Operations (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	$ 5,512	$ 7,564	$ 6,623
Accounts and other receivables, net	1,372	1,670
Inventories	886	167
Current assets of discontinued operations	7,770	9,401
Other assets	70	70
Deferred income tax assets	15,560	15,560
Non-current assets of discontinued operations	15,630	15,630
Accounts payable and other accrued expenses	988	3,684
Accrued warranty	8,675	9,254
Accrued restructuring	4	481
Current liabilities of discontinued operations	9,667	13,419
Accrued warranty	16,054	20,976
Other liabilities	233	181
Non-current liabilities of discontinued operations	$ 16,287	$ 21,157

Income Taxes Schedule of tax ex

Income Taxes Schedule of tax expense and the effective tax rate for our income from continuing operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income from continuing operations before income taxes	$ 51,826	$ 34,306	$ 139,570	$ 89,449
Provision (benefit) for income taxes	$ (31,968)	$ 5,268	$ (25,538)	$ 12,937
Effective tax rate	(61.70%)	15.40%	(18.30%)	14.50%

Income Taxes Narrative (Details

Income Taxes Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Tax Contingency [Line Items]
Federal statutory income tax rate	35.00%	35.00%	35.00%	35.00%
Excess tax benefits related to stock-based compensation and discontinued operations	$ (40.2)
Income tax penalties and interest accrued	$ 0.2	$ 0.3	$ 0.2	$ 0.3

Earnings Per Share Reconciliati

Earnings Per Share Reconciliation of the weighted-average shares outstanding used in the calculation of basic and diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Income from continuing operations, net of income taxes	$ 83,794	$ 29,038	$ 165,108	$ 76,512
Basic weighted-average common shares outstanding	39,786	39,681	39,787	39,723
Assumed exercise of dilutive stock options and restricted stock units	386	286	420	292
Diluted weighted-average common shares outstanding	40,172	39,967	40,207	40,015
Income from Continuing Operations:
Income (Loss) from Continuing Operations, Per Basic Share	$ 2.11	$ 0.73	$ 4.15	$ 1.93
Income (Loss) from Continuing Operations, Per Diluted Share	$ 2.09	$ 0.73	$ 4.11	$ 1.91

Earnings Per Share Schedule of

Earnings Per Share Schedule of stock options and restricted units were excluded in the computation of diluted earnings per share because they were anti-dilutive (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options and restricted units excluded from the computation of diluted earnings per share because they were anti-dilutive	0	1	1	1

Earnings Per Share Stock Buybac

Earnings Per Share Stock Buyback (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended
	Aug. 31, 2017	Sep. 30, 2017	Sep. 16, 2015
Earnings Per Share [Abstract]
Authorized amount			$ 150
Treasury stock, common, value	$ 25
Treasury stock, shares, acquired (in shares)	351,292
Treasury stock acquired, average cost per share (in dollars per share)	$ 71.16
Remaining authorized repurchase amount		$ 75

Marketable Securities (Details)

Marketable Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities	$ 3,046	$ 4,737
Available-for-sale Debt Securities, Amortized Cost Basis	$ 3,044	$ 4,735

Marketable Securities The matur

Marketable Securities The maturities of our marketable securities available for sale (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities	$ 3,046	$ 4,737
Available-for-sale Debt Securities, Amortized Cost Basis	$ 3,044	$ 4,735
Certificates of Deposit [Member] | Minimum [Member]
Schedule of Available-for-sale Securities [Line Items]
Maturities of marketable securites, by date	Oct. 10, 2017
Certificates of Deposit [Member] | Maximum [Member]
Schedule of Available-for-sale Securities [Line Items]
Maturities of marketable securites, by date	Jul. 28, 2018

Marketable Securities Compositi

Marketable Securities Composition of Marketable Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities	$ 3,046	$ 4,737
Available-for-sale Debt Securities, Amortized Cost Basis	$ 3,044	$ 4,735

Marketable Securities Fair Valu

Marketable Securities Fair Value of our Marketable Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Assets, Fair Value Disclosure, Recurring	$ 3,046	$ 4,737
Fair Value, Inputs, Level 1 [Member]
Schedule of Available-for-sale Securities [Line Items]
Assets, Fair Value Disclosure, Recurring	0	0
Fair Value, Inputs, Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Assets, Fair Value Disclosure, Recurring	3,046	4,737
Fair Value, Inputs, Level 3 [Member]
Schedule of Available-for-sale Securities [Line Items]
Assets, Fair Value Disclosure, Recurring	$ 0	$ 0

Derivative Financial Instrume54

Derivative Financial Instruments (Details)	9 Months Ended
	Sep. 30, 2017USD ($)intstrument	Dec. 31, 2016intstrument
Derivative [Line Items]
Number of instruments held | intstrument	1	0
Derivative, notional amount	$ 10,600,000
Gain (Loss) on Foreign Currency Cash Flow Hedge Ineffectiveness	$ 3,500,000

Derivative Financial Instrume55

Derivative Financial Instruments Gain (loss) on foreign currency exchange contracts (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Foreign Exchange [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (469)	$ 0	$ (1,096)	$ (569)

Inventories Components of inven

Inventories Components of inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Parts and raw materials	$ 52,991	$ 43,278
Work in process	8,901	5,292
Finished goods	11,628	7,200
Inventory, Net	$ 73,520	$ 55,770

Property and Equipment Details

Property and Equipment Details of property and equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 82,707	$ 76,775
Less: Accumulated depreciation	(66,971)	(63,438)
Property and equipment, net	15,736	13,337
Buildings and Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,656	1,581
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	35,270	32,743
Computer and Communication Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	26,452	24,637
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,379	1,267
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	340	357
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	16,538	15,546
Construction in Process [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,072	$ 644

Property and Equipment Deprecia

Property and Equipment Depreciation expense recorded in continuing operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 1,333	$ 845	$ 3,616	$ 2,758

Goodwill Schedule of the change

Goodwill Schedule of the changes in goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)
Goodwill [Roll Forward]
September 30, 2017	$ 42,125
Additions	8,929
Effect of Changes in Exchange Rates	2,455
December 31, 2016	$ 53,509

Intangible Assets Schedule of o

Intangible Assets Schedule of other intangible assets (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 51,003	$ 40,474
Finite-Lived Intangible Assets, Accumulated Amortization	(16,568)	(12,403)
Finite-lived intangible assets, net	34,435	28,071
Technology-based [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	18,537	11,643
Finite-Lived Intangible Assets, Accumulated Amortization	(5,082)	(3,673)
Finite-lived intangible assets, net	13,455	7,970
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	29,865	26,608
Finite-Lived Intangible Assets, Accumulated Amortization	(10,012)	(7,451)
Finite-lived intangible assets, net	19,853	19,157
Trademarks and other [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	2,601	2,223
Finite-Lived Intangible Assets, Accumulated Amortization	(1,474)	(1,279)
Finite-lived intangible assets, net	$ 1,127	$ 944

Intangible Assets Schedule of a

Intangible Assets Schedule of amortization expense relating to other intangible assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 51,003		$ 51,003		$ 40,474
Finite-Lived Intangible Assets, Accumulated Amortization	(16,568)		(16,568)		(12,403)
Finite-lived intangible assets, net	34,435		34,435		28,071
Amortization expense	1,240	$ 1,048	3,176	$ 3,180
Technology Equipment [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	18,537		18,537		11,643
Finite-Lived Intangible Assets, Accumulated Amortization	(5,082)		(5,082)		(3,673)
Finite-lived intangible assets, net	$ 13,455		$ 13,455		$ 7,970

Intangible Assets Schedule of F

Intangible Assets Schedule of Finite-Lived Intangible Assets, Future Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
2016 (remaining)	$ 1,180
2,017	4,842
2,018	4,825
2,019	4,146
2,020	4,043
Thereafter	15,399
Finite-lived intangible assets, net	$ 34,435	$ 28,071

Warranties Narrative (Details)

Warranties Narrative (Details)	9 Months Ended
	Sep. 30, 2017
Minimum [Member]
Product Liability Contingency [Line Items]
Standard Product Warranty Term	12 months
Maximum [Member]
Product Liability Contingency [Line Items]
Standard Product Warranty Term	24 months

Warranties Changes in accrued p

Warranties Changes in accrued product warranties (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Movement in Standard Product Warranty Accrual [Roll Forward]
Balances at beginning of period	$ 3,933	$ 1,933	$ 2,329	$ 1,633
Increases to accruals related to sales during the period	333	789	2,722	1,726
Product Warranty Expense	(439)	(197)	(1,236)	(811)
Product Warranty Accrual, Foreign Exchange Impact	6	(8)	(18)	31
Balances at end of period	$ 3,833	$ 2,517	$ 3,833	$ 2,517

Pension Liability (Details)

Pension Liability (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	$ (20,353)		$ (20,353)		$ (18,836)
Defined Benefit Plan, Interest Cost	242	$ 235	742	$ 747
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(128)	(121)	(394)	(385)
Pension Cost (Reversal of Cost)	178	$ 194	545	$ 617
Payments through April 30, 2024 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	900		900
Payments from May 1, 2024 through November 30, 2033 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 1,800		$ 1,800

Pension Liability Net Periodic

Pension Liability Net Periodic Pension Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Postemployment Benefits [Abstract]
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	$ 128	$ 121	$ 394	$ 385
Defined Benefit Plan, Interest Cost	242	235	742	747
Defined Benefit Plan, Amortization of Gain (Loss)	64	80	197	255
Pension Cost (Reversal of Cost)	$ 178	$ 194	$ 545	$ 617

Pension Liability Net Pension L

Pension Liability Net Pension Liability (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	$ (20,353)	$ (18,836)

Stock-Based Compensation Schedu

Stock-Based Compensation Schedule of stock-based compensation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based compensation expense	$ 3,453	$ 1,301	$ 10,707	$ 4,299

Stock-Based Compensation Summar

Stock-Based Compensation Summary of stock option activity (Details) - Time Based [Member] - $ / shares shares in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	355	355	375	474
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 18.14	$ 18.14	$ 17.95	$ 17.47
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	(20)	(114)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 14.58	$ 15.35
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	0	(5)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price	$ 0	$ 18.19

Stock-Based Compensation Summ70

Stock-Based Compensation Summary of non-vested Restricted Stock Units activity (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares shares in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 74.56	$ 63.59
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 34.12	$ 31.73
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	392	392	411	354
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	2	250
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	$ 28.99	$ 30.60
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	(20)	(205)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	(1)	(7)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 50.71	$ 50.71	$ 49.56	$ 29.60

Stock-Based Compensation Narrat

Stock-Based Compensation Narrative (Details)	9 Months Ended
	Sep. 30, 2017shares
Common Stock, Capital Shares Reserved for Future Issuance	4,936,598
2017 OMNIBUS Incentive Plan [Member] [Domain]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	4,189,179
Minimum [Member]
Award vesting period	3 years
Maximum [Member]
Award vesting period	4 years
Performance Shares [Member] | Minimum [Member]
Award vesting period	3 years
Performance Shares [Member] | Maximum [Member]
Award vesting period	10 years
Restricted Stock Units (RSUs) [Member] | Minimum [Member]
Award vesting period	3 years
Restricted Stock Units (RSUs) [Member] | Maximum [Member]
Award vesting period	4 years
Restricted Stock Units (RSUs), Performance Period [Member]
Award vesting period	3 years

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Millions	Sep. 30, 2017USD ($)
Other Commitments [Line Items]
Purchase Commitment, Remaining Minimum Amount Committed	$ 95.5

Related Party Transactions (Det

Related Party Transactions (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)Companies	Sep. 30, 2016Companies	Sep. 30, 2017USD ($)Companies	Sep. 30, 2016Companies	Dec. 31, 2016USD ($)
Related Party Transaction [Line Items]
Related Party Transactions, Number of Companies			1	0
Accounts Receivable, Related Parties | $	$ 277		$ 277		$ 0
Management [Member]
Related Party Transaction [Line Items]
Related Party Transactions, Number of Companies	1	2	1	3

Related Party Transactions Sche

Related Party Transactions Schedule of related party transactions (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)Companies	Sep. 30, 2016USD ($)Companies	Sep. 30, 2017USD ($)Companies	Sep. 30, 2016USD ($)Companies	Dec. 31, 2016USD ($)
Related Party Transaction [Line Items]
Accounts Receivable, Related Parties | $	$ 277		$ 277		$ 0
Sales - related parties | $	$ 648	$ 673	$ 1,255	$ 896
Related Party Transactions, Number of Companies | Companies			1	0
Management [Member]
Related Party Transaction [Line Items]
Related Party Transactions, Number of Companies | Companies	1	2	1	3

Geographic and Customer Infor75

Geographic and Customer Information Significant Customer Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Concentration Risk [Line Items]
Sales Revenue, Goods, Net	$ 152,363	$ 107,650	$ 424,478	$ 294,695
Applied Materials, Inc. [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	43.60%			41.10%
Concentration Risk, Amount	$ 32,681		32,681		$ 31,078
Applied Materials, Inc. [Member] | Sales Revenue, Goods, Net [Member]
Concentration Risk [Line Items]
Sales Revenue, Goods, Net	$ 50,078	$ 45,806	$ 165,239	$ 118,364
Concentration Risk, Percentage	28.40%	36.20%	33.60%	34.00%
Lam Research [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	4.70%			18.90%
Concentration Risk, Amount	$ 3,550		$ 3,550		$ 14,317
Lam Research [Member] | Sales Revenue, Goods, Net [Member]
Concentration Risk [Line Items]
Sales Revenue, Goods, Net	$ 46,315	$ 24,305	$ 114,325	$ 73,319
Concentration Risk, Percentage	26.20%	19.20%	23.20%	21.00%