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Share-Based Payments - Summary of Restricted Stock Awards and Stock Performance Awards (Details) - $ / shares
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Restricted Stock Awards      
Shares      
Beginning of year (in shares) 138,093    
Granted (in shares) 51,600    
Vested (in shares) (48,142)    
Forfeited (in shares) 0    
End of year (in shares) 141,551 138,093  
Weighted-Average Grant-Date Fair Value      
Beginning of year (in dollars per share) $ 44.48    
Granted (in dollars per share) 59.95 $ 43.55 $ 45.97
Vested (in dollars per share) 45.35    
Forfeited (in dollars per share) 0    
End of year (in dollars per share) $ 49.83 $ 44.48  
Stock Performance Awards      
Shares      
Beginning of year (in shares) 189,600    
Granted (in shares) 55,800    
Vested (in shares) (55,600)    
Forfeited (in shares) 0    
End of year (in shares) 189,800 189,600  
Weighted-Average Grant-Date Fair Value      
Beginning of year (in dollars per share) $ 42.54    
Granted (in dollars per share) 54.91 $ 38.34 $ 47.79
Vested (in dollars per share) 43.30    
Forfeited (in dollars per share) 0    
End of year (in dollars per share) $ 45.95 $ 42.54