XML 115 R99.htm IDEA: XBRL DOCUMENT v3.20.4
Stockholders' Equity - Stock Compensation - Options - Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Options      
Outstanding, beginning of period (in shares) 2,125,861 2,352,609 2,458,237
Granted (in shares) 63,771 429,124 477,956
Forfeited (in shares) (102,163) (112,120) (174,376)
Exercised (in shares) (1,042,186) (543,752) (409,208)
Outstanding, end of period (in shares) 1,045,283 2,125,861 2,352,609
Weighted Average Exercise Price      
Outstanding, beginning of period (in dollars per share) $ 69.22 $ 68.10 $ 61.50
Granted (in dollars per share) 62.93 66.22 96.39
Forfeited (in dollars per share) 75.63 78.18 80.21
Exercised (in dollars per share) 61.92 60.16 56.36
Outstanding, end of period (in dollars per share) $ 75.48 $ 69.22 $ 68.10
Vested and Expected to Vest      
Vested and expected to vest end of period (in shares) 1,042,443    
Vested and expected to vest end of period (in dollars per share) $ 75.51    
Exercisable, end of period (in shares) 841,892    
Exercisable, end of period (in dollars per share) $ 76.41    
Weighted average remaining contractual term      
Outstanding 4 years 6 months 18 days    
Vested and expected to vest 4 years 6 months 14 days    
Exercisable 3 years 7 months 24 days    
Aggregate intrinsic value      
Outstanding $ 12,984    
Vested and expected to vest end of period 12,936    
Exercisable, end of period $ 10,131