Annual report pursuant to Section 13 and 15(d)

Employee Benefits and Share-Based Compensation - Summary of Share Option Awards (Details 1)

v3.10.0.1
Employee Benefits and Share-Based Compensation - Summary of Share Option Awards (Details 1) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Weighted- Average Contractual Term (years)    
Outstanding 6 years 2 months 19 days 6 years 11 months 27 days
Vested and expected to vest 6 years 2 months 9 days  
Exercisable 6 years 1 month 10 days  
Aggregate intrinsic Value    
Outstanding $ 13,946 $ 50,021
Vested and expected to vest 13,946  
Exercisable $ 13,928  
Time Based Options    
Number of Share Option Awards    
Outstanding as of beginning of period 6,580,898  
Granted 0  
Exercised (674,272)  
Forfeited and cancelled (219,833)  
Outstanding as of end of period 5,686,793 6,580,898
Vested and expected to vest as of end of period 5,686,793  
Exercisable as of end of period 5,022,818  
Weighted-Average Exercise Price    
Outstanding as of beginning of period $ 49.18  
Granted 0  
Exercised 35  
Forfeited and cancelled 54.76  
Outstanding as of end of period 50.65 $ 49.18
Vested and expected to vest as of end of period 50.65  
Exercisable as of end of period $ 50.18  
Performance Based Options    
Number of Share Option Awards    
Outstanding as of beginning of period 373,969  
Granted 208,335  
Exercised (115,785)  
Forfeited and cancelled (56,020)  
Outstanding as of end of period 410,499 373,969
Vested and expected to vest as of end of period 254,249  
Exercisable as of end of period 254,249  
Weighted-Average Exercise Price    
Outstanding as of beginning of period $ 31.39  
Granted 59.43  
Exercised 19  
Forfeited and cancelled 56.59  
Outstanding as of end of period 45.67 $ 31.39
Vested and expected to vest as of end of period 37.22  
Exercisable as of end of period $ 37.22  
Market Based Share Option Awards    
Number of Share Option Awards    
Outstanding as of beginning of period 208,333  
Granted 0  
Exercised 0  
Forfeited and cancelled 0  
Outstanding as of end of period 208,333 208,333
Vested and expected to vest as of end of period 0  
Exercisable as of end of period 0  
Weighted-Average Exercise Price    
Outstanding as of beginning of period $ 59.43  
Granted 0  
Exercised 0  
Forfeited and cancelled 0  
Outstanding as of end of period 59.43 $ 59.43
Vested and expected to vest as of end of period 0  
Exercisable as of end of period $ 0