Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation Plans and Awards - MSUs and PSUs narrative (Details)

v3.8.0.1
Stock-based Compensation Plans and Awards - MSUs and PSUs narrative (Details)
 1 Months Ended 7 Months Ended 12 Months Ended
Mar. 31, 2015
performance_period
Oct. 31, 2016
Dec. 31, 2017
USD ($)
shares
Dec. 31, 2016
USD ($)
$ / shares
shares
Dec. 31, 2015
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Grants in period (in shares) | shares     2,226,443    
Stock-based compensation expense     $ 128,431,000 $ 138,458,000 $ 111,645,000
MSUs          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Requisite service period 3 years        
Number of performance periods used for measurement | performance_period 3        
Total stockholder return before performance period start, duration period 90 days        
Total stockholder return before end of performance period, duration period 90 days        
Performance multiplier, percentage point decrease 3.00%        
Performance multiplier, percentage point increase 2.00%        
Grants in period (in shares) | shares     0 0 776,000
Total grant date fair value of stock options vested         $ 4,300,000
Stock-based compensation expense     $ 400,000 $ 700,000 $ 1,500,000
MSUs | One-Year Performance Period          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percent 33.33%       22.00%
Decrease in shareholder return (percent)         26.00%
MSUs | Two-Year Performance Period          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percent 33.33%     0.00%  
Decrease in shareholder return (percent)       48.00%  
MSUs | Three-Year Performance Period          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percent     0.00%    
Decrease in shareholder return (percent)     101.00%    
MSUs | Maximum | One and Two-Year Performance Period          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Performance multiplier 100.00%        
MSUs | Maximum | Two-Year Performance Period          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Performance multiplier 100.00%        
MSUs | Maximum | Three-Year Performance Period          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Performance multiplier 200.00%        
PSUs          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Requisite service period   4 years 4 years    
Total stockholder return before performance period start, duration period   90 days      
Grants in period (in shares) | shares     0 1,835,250 0
Total grant date fair value of stock options vested       $ 9,800,000  
Stock-based compensation expense     $ 2,000,000.0 $ 3,800,000 $ 0
Service period over which company recognizes stock-based compensation (years)     2 years 1 month 20 days    
Unrecognized compensation cost     $ 900,000    
PSUs | One-Year Performance Period          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Requisite service period   1 year      
Vesting percent   25.00%      
PSUs | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
90 Day trailing stock price to vest (usd per share) | $ / shares       $ 20.00