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Share-Based Compensation - Stock Options (Details) - USD ($)
 12 Months Ended 192 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2019
2004 plan        
Additional disclosures        
Granted (in shares)       0
2020 plan        
Share-Based Compensation        
Number of shares registered 2,072,245      
Employee Stock Option [Member]        
Number of shares        
Outstanding at the beginning of the period (in shares) 161,832 185,125 256,425  
Assumed stock options and warrants from ACBI merger (in shares)   23,410    
Exercised (in shares) (48,749) (43,525) (64,075)  
Forfeited (in shares)   (356) (6,250)  
Expired (in shares) (5,491) (2,822) (975)  
Outstanding at the end of the period (in shares) 107,592 161,832 185,125  
Exercisable at the end of the period (in shares) 107,592 161,832 185,125  
Weighted-Average Exercise Price        
Outstanding at the beginning of the period (in dollars per share) $ 66.20 $ 63.03 $ 59.01  
Assumed stock options and warrants from ACBI merger (in dollars per share)   40.73    
Exercised (in dollars per share) 55.88 41.16 45.35  
Expired (in dollars per share) 32.25 36.98 24.37  
Forfeited (in dollars per share)   38.31 85.42  
Outstanding at the end of the period (in dollars per share) 72.60 66.20 63.03  
Exercisable at the end of the period (in dollars per share) $ 72.60 $ 66.20 $ 63.03  
Aggregate Intrinsic Value        
Exercisable at the end of the period $ 1,700,000 $ 2,500,000 $ 3,800,000  
Additional disclosures        
Total unrecognized compensation cost related to non vested stock option grants 0 0 0  
Intrinsic value of stock option shares exercised $ 1,100,000 $ 1,700,000 $ 2,300,000  
Incentive stock options | Maximum        
Share-Based Compensation        
Vesting period 4 years      
Incentive stock options | Plan 2004 and 2012        
Share-Based Compensation        
Vesting percentage 25.00%      
Expiration period 10 years