Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Stock-based Compensation Plans and Awards - RSUs Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense $ 28,838 $ 30,101 $ 82,802 $ 98,327
RSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense $ 26,300 $ 27,700 $ 76,200 $ 86,500
RSUs | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period     3 years  
RSUs | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period     4 years