XML 64 R53.htm IDEA: XBRL DOCUMENT v3.10.0.1
STOCK-BASED COMPENSATION - Stock Option Activity (Details) - Employee Stock Option
$ / shares in Units, $ in Thousands
9 Months Ended
Sep. 30, 2018
USD ($)
$ / shares
shares
Number of Options  
Options outstanding at January 1, 2018 | shares 4,901,748
Options granted | shares 157,133
Options exercised | shares (863,365)
Options forfeited/cancelled | shares (30,819)
Options expired | shares (250)
Options outstanding at September 30, 2018 | shares 4,164,447
Options vested and exercisable at September 30, 2018 | shares 3,251,127
Options expected to vest at September 30, 2018 | shares 870,538
Weighted Average Exercise Price  
Options outstanding at January 1, 2018 | $ / shares $ 40.91
Options granted | $ / shares 112.91
Options exercised | $ / shares 36.90
Options forfeited/cancelled | $ / shares 63.39
Options expired | $ / shares 61.38
Options outstanding at September 30, 2018 | $ / shares 44.29
Options vested and exercisable at September 30, 2018 | $ / shares 35.94
Options expected to vest at September 30, 2018 | $ / shares $ 73.59
Aggregate Intrinsic Value  
Options outstanding at September 30, 2018 | $ $ 388,977
Options vested and exercisable at September 30, 2018 | $ 330,834
Options expected to vest at September 30, 2018 | $ $ 55,810
Weighted Average Remaining Contractual Term (in years)  
Options outstanding at September 30, 2018 5 years 8 months 5 days
Options vested and exercisable at September 30, 2018 5 years 1 month 28 days
Options expected to vest at September 30, 2018 7 years 6 months 2 days