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Shareholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended | 15 Months Ended
--- | --- | --- | --- | ---
Jan. 31, 2016 | Jan. 31, 2015 | Apr. 03, 2016 | Apr. 05, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Apr. 03, 2016
Stockholders Equity Note Disclosure [Line Items] |  |  |  |  |  |  |
Repurchase of stock, value |  |  | $ 28,000,000 |  |  | $ 300,000,000 |
Repurchase of stock, shares |  |  | 1.5 |  |  |  |
Cumulative repurchases, shares |  |  | 17.1 |  |  |  | 17.1
Cumulative repurchases, value |  |  | $ 328,000,000 |  |  |  | $ 328,000,000
Common stock average price |  |  | $ 18.81 |  |  |  | $ 19.17
Dividends payable, amount per share | $ 0.06 | $ 0.06 |  |  |  |  |
Dividends payable, date to be paid | Mar. 21, 2016 | Mar. 24, 2015 |  |  |  |  |
Dividends payable, record date | Feb. 26, 2016 | Feb. 27, 2015 |  |  |  |  |
Dividend payment |  |  | $ 12,253,000 | $ 13,049,000 |  |  |
Maximum |  |  |  |  |  |  |
Stockholders Equity Note Disclosure [Line Items] |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  | $ 500,000,000 |  |  |  |  |
Maximum | Scenario, Forecast |  |  |  |  |  |  |
Stockholders Equity Note Disclosure [Line Items] |  |  |  |  |  |  |
Repurchase of stock, value |  |  |  |  | $ 200,000,000 |  |
Minimum | Scenario, Forecast |  |  |  |  |  |  |
Stockholders Equity Note Disclosure [Line Items] |  |  |  |  |  |  |
Repurchase of stock, value |  |  |  |  | $ 100,000,000 |  |

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