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Equity Based Compensation Plans (Tables)
 12 Months Ended
Dec. 31, 2024
Share-Based Payment Arrangement, Noncash Expense [Abstract]  
Summary of Restricted Stock Activity
The following table summarizes information about the Company’s restricted stock awards:

Year Ended December 31,
 202420232022
Shares
Weighted-
average
grant
date fair value
Shares
Weighted-
average
grant
date fair value
Shares
Weighted-
average
grant
date fair value
Unvested at beginning of year101,701 $197.22 182,915 $222.90 159,401 $251.03 
Granted52,300 212.02 2,315 220.40 72,838 215.73 
Vested(24,002)187.32 (37,075)247.07 (44,945)306.25 
Forfeited and canceled(28,070)182.25 (46,454)259.71 (4,379)272.12 
Unvested at end of year101,929 $211.27 101,701 $197.22 182,915 $222.90 
Schedule of Weighted Average Assumptions Used to Estimate Fair Value of Stock Options Stock options have the following weighted average assumptions:
 202420232022
Stock price$— $216.31$245.17
Risk-free interest rates— 4.06 %3.50 %
Expected lives— 6 years6 years
Volatility— 36.00 %27.98 %
Dividend yield— 3.30 %3.06 %
Summary of Options Activity
The following table summarizes information about the Company’s stock options:
Year Ended December 31,
 202420232022
OptionsWeighted-
average
exercise
price		OptionsWeighted-
average
exercise
price		OptionsWeighted-
average
exercise
price
Outstanding at beginning of year530,812 $273.51 487,446 $279.46 463,863 $284.82 
Granted— — 49,908 216.31 111,757 245.17 
Exercised(56,304)218.68 — — (76,246)245.43 
Forfeited and canceled(3,125)266.21 (6,542)280.21 (11,928)281.19 
Outstanding at end of year471,383 $280.11 530,812 $273.51 487,446 $279.46 
Exercisable at year end453,240 $282.73 417,739 $282.30 293,377 $285.76 
Summary of Long Term Incentive Plan - Z Units
The following table summarizes information about the Company’s 2015 and 2014 Plans:
Total Vested and
Outstanding Units		Weighted-
average
Grant-date
Fair Value
Balance as of December 31, 2022106,137 $84.47 
Converted(8,500)
Balance as of December 31, 202397,637 $86.16 
Converted(30,142)
Balance as of December 31, 202467,495 $85.80