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Share-Based Plans (Details) - USD ($)
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Shares    
Unvested, beginning of period (in shares) 119,778  
Unvested, end of period (in shares) 113,808  
Restricted Stock    
Shares    
Unvested, beginning of period (in shares) 119,778 135,694
Granted (in shares) 8,550 11,775
Vested (in shares) (12,810) (26,096)
Forfeited (in shares) (1,710) (135)
Unvested, end of period (in shares) 113,808 121,238
Weighted-Average Grant Date Fair Value    
Unvested, beginning of period (in dollars per share) $ 54.56 $ 52.13
Granted (in dollars per share) 86.03 52.93
Vested (in dollars per share) 53.2 47.74
Forfeited (in dollars per share) 56.96 58.42
Unvested, end of period (in dollars per share) $ 57.04 $ 53.15
Additional information    
Fair value of shares vested $ 1,020,000.00 $ 1,460,000
Compensation expense 461,000 510,000
Compensation expense after tax 271,000 $ 313,000
Unrecognized compensation expense $ 3,830,000  
Weighted average period 2 years 10 months 24 days  
Restricted Stock | Employees    
Summary of restricted stock awards    
Vesting period 5 years  
Restricted Stock | Nonemployee Directors    
Summary of restricted stock awards    
Vesting period 3 years