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Stockholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2016 | Dec. 31, 2015
Equity [Abstract] |  |
Common stock, shares authorized | 300,000,000 | 300,000,000
Par value of common stock (in dollars per share) | $ 0.01 |
Authorized capitalization of preferred stock (in shares) | 3,500,000.0 |
Par value of preferred stock per share (in dollars per share) | $ 0.01 |
Number of shares authorized to be repurchased (in shares) | 10,000,000 |
Aggregate number of shares repurchased (in shares) | 7,600,000 |
Aggregate cost of shares repurchased | $ 49.8 |

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