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Stock-Based Compensation - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense $ 4,000 $ 2,700  
Accrued employee compensation and benefits 14,140   $ 25,085
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total compensation cost not yet recognized $ 6,100    
Total compensation cost not yet recognized, period for recognition (in years) 1 year 9 months 23 days    
Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total compensation cost not yet recognized $ 18,600    
Total compensation cost not yet recognized, period for recognition (in years) 1 year 9 months 26 days    
LTIP      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period (in years) 3 years    
Share-based compensation expense $ 800 $ 300  
Accrued employee compensation and benefits $ 2,400   $ 1,600
LTIP | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Multiplier for target award based on total shareholder return on common stock (percent) 0.00%    
LTIP | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Multiplier for target award based on total shareholder return on common stock (percent) 200.00%