Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation Plans and Awards - MSUs Narrative (Details)

v3.7.0.1
Stock-based Compensation Plans and Awards - MSUs Narrative (Details)
$ in Thousands
1 Months Ended 3 Months Ended
Dec. 31, 2016
Mar. 31, 2015
performance_period
Mar. 31, 2017
USD ($)
shares
Mar. 31, 2016
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense     $ 29,618 $ 38,655
Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Requisite service period     4 years  
Market Stock Units (MSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of performance periods | performance_period   3    
Requisite service period   3 years    
TSR prior to beginning of performance period   90 days    
TSR at end of performance period   90 days    
Performance multiplier, percentage point decrease   3.00%    
Grants in period (in shares) | shares     0 0
Stock-based compensation expense     $ 300 $ 200
Market Stock Units (MSUs) | One-Year Performance Period        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percent 22.00% 33.33%    
TSR decline (percent) 26.00%      
Market Stock Units (MSUs) | Two-Year Performance Period        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percent 0.00% 33.33%    
TSR decline (percent) 48.00%      
Market Stock Units (MSUs) | Three-Year Performance Period        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance multiplier, percentage point increase   2.00%    
Market Stock Units (MSUs) | Maximum | One-Year Performance Period        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance multiplier   100.00%    
Market Stock Units (MSUs) | Maximum | Two-Year Performance Period        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance multiplier   100.00%    
Market Stock Units (MSUs) | Maximum | Three-Year Performance Period        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance multiplier   200.00%