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Share-Based Compensation - Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Stock option activity        
Options outstanding (in shares)     52,805  
Options exercised (in shares)     (38,855)  
Options outstanding (in shares) 12,150   12,150  
Options exercisable (in shares) 12,150   12,150  
Stock option activity, weighted average exercise price        
Options Outstanding, weighted average exercise price (in dollars per share)     $ 9.81  
Options exercised, weighted average exercise price (in dollars per share)     10.25  
Options Outstanding, weighted average exercise price (in dollars per share) $ 8.02   8.02  
Options exercisable, weighted average exercise price (in dollars per share) $ 8.02   $ 8.02  
Options outstanding, weighted average remaining contractual term     2 months 19 days  
Options exercisable, weighted average remaining contractual term     2 months 19 days  
Options outstanding, aggregate intrinsic value $ 79   $ 79  
Options exercisable, aggregate intrinsic value 79   79  
Intrinsic value of options exercised 185 $ 204 388 $ 206
Cash received from options exercised 167 212 399 213
Excess tax benefit realized for options exercises $ 48 $ 46 $ 69 $ 46
Granted (in shares)     0 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period     1,800  
Options forfeited, weighted average exercise price (in dollars per share)     $ 12.50  
Options vested or expected to vest (in shares) 12,150   12,150  
Options vested or expected to vest, weighted average exercise price (in dollars per share) $ 8.02   $ 8.02  
Options vested or expected to vest, weighted average remaining contractual term     2 months 19 days  
Options vested or expected to vest, aggregate intrinsic value $ 79   $ 79