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Stockholders' Equity - Share Repurchase Programs - Additional Information (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2015
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Jul. 31, 2014
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|
| Equity [Abstract] | ||
| Purchase of common stock, shares | 2.9 | |
| Purchase of common stock, value | $ 40.0 | |
| Shares repurchase authorized amount | 200.0 | |
| Share repurchase plan, remaining authorized amount | $ 110.0 |