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Stock-Based Awards - Performance Awards Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 10 Months Ended 12 Months Ended
Jul. 31, 2016
Feb. 29, 2016
Feb. 28, 2015
Jul. 31, 2014
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based compensation expense           $ 54,699 $ 43,081 $ 33,680
Performance awards                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award vesting period 3 years              
Number of shares, vested (in shares) 499,800              
Weighted average grant date fair value (in usd per share) $ 38.67              
Share-based compensation expense           2,600 $ 1,900 $ 700
Unrecognized compensation expense           $ 3,300    
Unrecognized compensation expense, weighted-average period of recognition           1 year 6 months    
Performance based restricted stock units                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award vesting period   3 years   3 years        
Expected to vest (in shares)     535,000     267,500    
Aggregated grant date fair value     $ 9,900 $ 1,800 $ 5,000 $ 3,600    
Number of shares, vested (in shares)           802,500    
Number of shares forfeited (in shares)           30,000    
Performance based restricted stock units | Maximum                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Expected to vest (in shares)     1,070,000 60,900   535,000