Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation Plans and Awards - Stock options narrative (Details)

v3.6.0.2
Stock-based Compensation Plans and Awards - Stock options narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense $ 138,458 $ 111,645 $ 87,055
Service period over which company recognizes stock-based compensation (years) 4 years    
Stock options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense $ 13,800 $ 10,700 $ 14,700
Weighted-average fair value of stock option granted (in dollars per share) $ 0 $ 9.08 $ 19.74
Aggregate intrinsic value of options exercised $ 17,300 $ 9,500 $ 169,200
Total fair value of options vested 10,200 $ 17,600 $ 16,500
Employee stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost $ 11,200    
Service period over which company recognizes stock-based compensation (years) 1 year 6 months 18 days