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Acquisitions and Dispositions - Allocation of Acquired Intangible Assets and Liabilities Related Estimates of Useful Lives (Detail) - USD ($) $ in Thousands |  | 12 Months Ended
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Apr. 29, 2016 | Dec. 31, 2016
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, purchase price | $ 404,506 |
Newport [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, purchase price |  | $ 404,506
Order Backlog [Member] | Newport [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, purchase price | $ 12,100 |
Estimated useful life of finite-lived intangible assets | 1 year |
Customer Relationships [Member] | Newport [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, purchase price | $ 247,793 | $ 247,793
Customer Relationships [Member] | Newport [Member] | Minimum [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life of finite-lived intangible assets | 6 years |
Customer Relationships [Member] | Newport [Member] | Maximum [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life of finite-lived intangible assets | 18 years |
Trademarks and Trade Names [Member] | Newport [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, purchase price | $ 55,900 |
Estimated useful life of finite-lived intangible assets | Indefinite |
Developed Technology [Member] | Newport [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, purchase price | $ 75,386 |
Developed Technology [Member] | Newport [Member] | Minimum [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life of finite-lived intangible assets | 4 years |
Developed Technology [Member] | Newport [Member] | Maximum [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life of finite-lived intangible assets | 8 years |
In-process Research and Development [Member] | Newport [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, purchase price | $ 6,899 |
Estimated useful life of finite-lived intangible assets | Undefined |
Leasehold Interest Favorable [Member] | Newport [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, purchase price | $ 6,428 |
Leasehold Interest Favorable [Member] | Newport [Member] | Minimum [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life of finite-lived intangible assets | 4 years |
Leasehold Interest Favorable [Member] | Newport [Member] | Maximum [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life of finite-lived intangible assets | 5 years |
Leasehold Interest Unfavorable [Member] | Newport [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, purchase price | $ 4,302 |

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