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Stockholders' Equity - Additional Information (Detail) - USD ($) $ in Thousands |  | 4 Months Ended |
--- | --- | --- | ---
Mar. 16, 2016 | Apr. 23, 2016 | Jul. 16, 2016
Class Of Stock [Line Items] |  |  |
Agreement to repurchase an aggregate of common stock |  | $ 108,297 |
Purchase of shares under accelerated share repurchase | 5,600,000 | 5,959,814 |
Total ASR Cost |  |  |
Class Of Stock [Line Items] |  |  |
Agreement to repurchase an aggregate of common stock | $ 120,000 |  |
Total ASR Cost | Scenario, Forecast |  |  |
Class Of Stock [Line Items] |  |  |
Number of shares to be repurchased |  |  | 18,000,000
Original ASR Amount Settled |  |  |
Class Of Stock [Line Items] |  |  |
Agreement to repurchase an aggregate of common stock | $ 120,000 |  |
Authorized share repurchase plan |  |  |
Class Of Stock [Line Items] |  |  |
Agreement to repurchase an aggregate of common stock |  | $ 612,400 |
Purchase of shares under accelerated share repurchase |  | 66,800,000 |

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