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Goodwill and Intangible Assets - Intangible Assets (Detail) - USD ($) $ in Thousands |  | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 29, 2016 | Sep. 30, 2017 | Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible assets, Gross |  | $ 573,353 | $ 573,353
Impairment Charges |  | (1,511) |
Accumulated Amortization |  | (196,347) | (160,813)
Foreign Currency Translation |  | 839 | (4,536)
Intangible assets, net |  | 376,334 | 408,004
Acquired intangible assets | $ 404,506 |  |
Newport [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Acquired intangible assets |  |  | 404,506
Completed Technology [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible assets, Gross |  | 176,586 | 176,586
Impairment Charges |  | (105) |
Accumulated Amortization |  | (114,095) | (97,707)
Foreign Currency Translation |  | 49 | (1,068)
Intangible assets, net |  | 62,435 | 77,811
Completed Technology [Member] | Newport [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Acquired intangible assets |  |  | 75,386
Customer Relationships [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible assets, Gross |  | 285,044 | 285,044
Impairment Charges |  | (1,406) |
Accumulated Amortization |  | (43,397) | (29,709)
Foreign Currency Translation |  | 832 | (3,404)
Intangible assets, net |  | 241,073 | 251,931
Customer Relationships [Member] | Newport [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Acquired intangible assets | $ 247,793 |  | 247,793
Patents, Trademarks, Trade Names and Other [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible assets, Gross |  | 111,723 | 111,723
Accumulated Amortization |  | (38,855) | (33,397)
Foreign Currency Translation |  | (42) | (64)
Intangible assets, net |  | $ 72,826 | 78,262
Patents, Trademarks, Trade Names and Other [Member] | Newport [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Acquired intangible assets |  |  | $ 81,327

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References No definition available. + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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