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Share-Based Payments - Summary of Restricted Stock Awards and Stock Performance Awards (Details)
 3 Months Ended
Mar. 31, 2024
$ / shares
shares
Restricted Stock Awards  
Shares  
Beginning of year (in shares) | shares 148,913
Granted (in shares) | shares 18,175
Vested (in shares) | shares (16,283)
Forfeited (in shares) | shares 0
End of year (in shares) | shares 150,805
Weighted-Average Grant-Date Fair Value  
Beginning of year (in dollars per share) | $ / shares $ 56.48
Granted (in dollars per share) | $ / shares 90.67
Vested (in dollars per share) | $ / shares 55.02
Forfeited (in dollars per share) | $ / shares 0
End of year (in dollars per share) | $ / shares $ 60.76
Stock Performance Awards  
Shares  
Beginning of year (in shares) | shares 194,200
Granted (in shares) | shares 43,400
Vested (in shares) | shares (79,000)
Forfeited (in shares) | shares 0
End of year (in shares) | shares 158,600
Weighted-Average Grant-Date Fair Value  
Beginning of year (in dollars per share) | $ / shares $ 50.33
Granted (in dollars per share) | $ / shares 94.45
Vested (in dollars per share) | $ / shares 38.34
Forfeited (in dollars per share) | $ / shares 0
End of year (in dollars per share) | $ / shares $ 68.37