Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation (Stock Options) (Details)

v3.22.0.1
Stock-Based Compensation (Stock Options) (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Weighted-Average Remaining Contractual Life        
Outstanding   4 years 1 month 6 days    
Stock Option        
Options        
Outstanding at the beginning of the period (in shares) 438,040 1,150,586 1,887,969  
Granted (in shares) 4,781   81,807  
Exercised (in shares) (76,303) (705,333) (783,216)  
Forfeited (in shares) (1,277) (7,213) (35,974)  
Outstanding at the end of the period (in shares) 365,241 438,040 1,150,586 1,887,969
Options exercisable (in shares) 321,487      
Weighted-Average Exercise Price        
Outstanding at the beginning of the period (in dollars per share) $ 36.28 $ 25.66 $ 20.05  
Granted (in dollars per share) 74.83   49.02  
Exercised (in dollars per share) 27.37 18.83 13.52  
Forfeited (in dollars per share) 49.02 48.70 48.33  
Outstanding at the end of the period (in dollars per share) 38.61 $ 36.28 $ 25.66 $ 20.05
Options exercisable (in dollars per share) $ 36.80      
Weighted-Average Remaining Contractual Life        
Outstanding 3 years 3 months 18 days 4 years 1 month 6 days 3 years 4 months 24 days 3 years 4 months 24 days
Options exercisable 2 years 9 months 18 days      
Aggregate Intrinsic Value        
Outstanding $ 14,878 $ 20,156 $ 50,590 $ 56,046
Options exercisable $ 13,675