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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