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Capital Stock - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Oct. 17, 2016
Stockholders Equity Note [Line Items] |  |  |  |  |
Common stock, shares authorized | 400,000,000 | 400,000,000 |  |  |
Common Stock, par value | $ 0.01 | $ 0.01 |  |  |
Preferred stock, shares authorized | 10,000,000 |  |  |  |
Preferred stock, par value | $ 0.01 |  |  |  |
Stock Repurchase Program, Additional Repurchase Authorization |  |  |  |  | $ 300,000
Common stock repurchased, total purchase price | $ 27,604 | $ 7,828 | $ 4,123 |  |
Common stock repurchase, remaining authorized amount | $ 112,500 |  |  |  |
Treasury stock, shares | 64,332,032 | 64,682,900 |  |  |
Activity related to restricted stock units vested [Member] |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Treasury shares issued | 1,301,777 | 339,972 | 421,108 |  |
Average cost for restricted stock units | $ 2.86 | $ 3.12 | $ 3.15 |  |
Shares repurchased to satisfy employee withholding tax requirements resulting from certain restricted stock units becoming vested | 543,369 | 107,420 | 138,080 |  |
Common stock repurchased, average cost | $ 28.51 | $ 28.46 | $ 30.24 |  |
Non-tender offer repurchase [Member] |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Repurchases of common stock |  | 188,300 |  | 294,930 |
Common stock repurchased, total purchase price |  | $ 4,800 |  | $ 7,200 |
Treasury Stock Acquired, Average Cost Per Share |  | $ 25.31 |  | $ 24.40 |
2016 BOD Authorized Common Stock Repurchase [Member] | Non-tender offer repurchase [Member] |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Repurchases of common stock | 407,540 |  |  |  |
Common stock repurchased, total purchase price | $ 12,100 |  |  |  |
Treasury Stock Acquired, Average Cost Per Share | $ 29.70 |  |  |  |

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