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Acquisitions - Summary of Purchase Price (Detail) - USD ($) $ in Thousands |  | 12 Months Ended
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Apr. 29, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Business Acquisition [Line Items] |  |  |  |
Total purchase price, net of cash and cash equivalents acquired |  | $ 939,591 | $ 9,910 | $ 86,950
Newport [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash paid for outstanding shares | $ 905,254 |  |  |
Settlement of share-based compensation awards | 8,824 |  |  |
Cash paid for Newport debt | 93,200 |  |  |
Total purchase price | 1,007,278 |  |  |
Less: cash and cash equivalents acquired | (61,463) |  |  |
Total purchase price, net of cash and cash equivalents acquired | $ 945,815 |  |  |

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