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Stockholders' Equity - Additional Information (Detail) (USD $)
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3 Months Ended | |||
|---|---|---|---|---|
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Mar. 31, 2015
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Mar. 31, 2014
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Jan. 21, 2015
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Nov. 06, 2013
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| Equity, Class of Treasury Stock [Line Items] | ||||
| Dividend payable | $ 0.187 | |||
| Dividend declared date | Jan. 21, 2015 | |||
| Dividend payable date | Mar. 19, 2015 | |||
| Stockholder of record date | Mar. 05, 2015 | |||
| Share repurchase program authorized amount | $ 125,000,000 | |||
| Treasury stock value | 15,284,000 | 407,000 | ||
| Share Repurchase Program | ||||
| Equity, Class of Treasury Stock [Line Items] | ||||
| Treasury stock shares acquired | 387,000 | |||
| Treasury stock value | 15,000,000 | |||
| Treasury stock shares available for repurchase | 85,000,000 | |||
| Minimum tax withholding obligations | ||||
| Equity, Class of Treasury Stock [Line Items] | ||||
| Treasury stock shares acquired | 7,000 | |||
| Treasury stock value | $ 276,000 | |||