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Employee Benefits - Summary of Equity-Based Awards for Employees (Details)
 6 Months Ended
Jun. 30, 2023
$ / shares
shares
Common Stock Awards  
Awards  
Nonvested common stock awards, Beginning balance (in shares) | shares 157,117
Granted (in shares) | shares 75,928
Vested (in shares) | shares (107,862)
Forfeited/Cancelled (in shares) | shares (860)
Nonvested common stock awards, Ending balance (in shares) | shares 124,323
Weighted Average Grant Date Fair Value Per Share  
Nonvested performance-based stock awards, Beginning balance (in USD per share) | $ / shares $ 77.31
Granted (in USD per share) | $ / shares 111.03
Vested (in USD per share) | $ / shares 71.23
Forfeited/Cancelled (in USD per share) | $ / shares 98.41
Nonvested performance-based stock awards, Ending balance (in USD per share) | $ / shares $ 103.03
Performance-Based Stock Awards  
Awards  
Nonvested performance-based stock awards/units, Beginning balance (in shares) | shares 126,053
Granted (in shares) | shares 69,281
Forfeited/Cancelled (in shares) | shares 0
Vested (in shares) | shares (50,994)
Nonvested performance-based stock awards/units, Ending balance (in shares) | shares 144,340
Weighted Average Grant Date Fair Value Per Share  
Nonvested performance-based stock awards/units, Beginning balance (in USD per share) | $ / shares $ 103.37
Granted (in USD per share) | $ / shares 109.09
Vested (in USD per share) | $ / shares 95.78
Forfeited/Cancelled (in USD per share) | $ / shares 0
Nonvested performance-based stock awards/units, Ending balance (in USD per share) | $ / shares $ 108.80
Performance-Based Restricted Stock Units  
Awards  
Nonvested performance-based stock awards/units, Beginning balance (in shares) | shares 15,711
Granted (in shares) | shares 14,684
Forfeited/Cancelled (in shares) | shares (275)
Vested (in shares) | shares (15,472)
Nonvested performance-based stock awards/units, Ending balance (in shares) | shares 14,648
Weighted Average Grant Date Fair Value Per Share  
Nonvested performance-based stock awards/units, Beginning balance (in USD per share) | $ / shares $ 80.55
Granted (in USD per share) | $ / shares 111.71
Vested (in USD per share) | $ / shares 80.55
Forfeited/Cancelled (in USD per share) | $ / shares 84.62
Nonvested performance-based stock awards/units, Ending balance (in USD per share) | $ / shares $ 111.71