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 6 Months Ended
Dec. 31, 2016
Mar. 31, 2015
performance_period
Jun. 30, 2017
USD ($)
shares
Jun. 30, 2016
USD ($)
shares
Jun. 30, 2017
USD ($)
shares
Jun. 30, 2016
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based compensation expense     $ 38,608 $ 32,432 $ 68,226 $ 71,087
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 0 0
Stock-based compensation expense     $ (100) $ 200 $ 200 $ 400
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%