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Stockholders' Equity (Details)
 3 Months Ended 9 Months Ended
Sep. 30, 2017
$ / shares
shares
Sep. 30, 2017
USD ($)
vote
$ / shares
shares
Sep. 30, 2016
USD ($)
shares
Feb. 28, 2017
USD ($)
Feb. 08, 2017
right
$ / shares
shares
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Common stock shares authorized (in shares) 300,000,000.0 300,000,000.0      
Common stock par value (USD per share) | $ / shares $ 0.01 $ 0.01     $ 0.01
Preferred stock authorized shares (in shares) 10,000.00 10,000.00      
Preferred stock par or stated value (in dollars per share) | $ / shares $ 0.01 $ 0.01      
Common stock, number of votes granted per common share held | vote   1      
Number of rights authorized per share of outstanding common stock | right         1
Percentage ownership of common stock outstanding required to exercise rights         20.00%
Series A Preferred Stock          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Preferred stock par or stated value (in dollars per share) | $ / shares         $ 0.01
Exercise price of right (in dollars per share) | $ / shares         $ 90
Number of shares called by each right         0.001
Performance-based Restricted Stock Units          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Value of treasury stock acquired (in shares) | $   $ 4,800,000 $ 2,000,000    
Repurchase of shares upon vesting of PRSUs withheld to satisfy tax withholding obligations (in shares)   100,000 100,000    
February 2016 Program          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Maximum authorized amount under stock repurchase program | $       $ 200,000,000.0  
Treasury stock acquired (in shares) 0 600,000      
Value of treasury stock acquired (in shares) | $   $ 40,100,000      
Remaining shares under share repurchase authorization (in shares) 226,900,000 226,900,000