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Stock Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Changes in Option Shares
Changes in options, all of which relate to the Company’s Common Stock, were as follows:
Years Ended December 31202420232022
Number of
Options		Weighted
Avg. Per
Share
Exercise
Price		Number of
Options		Weighted
Avg. Per
Share
Exercise
Price		Number of
Options		Weighted
Avg. Per
Share
Exercise
Price
Number of shares under options:
Outstanding at beginning of year1,872,553 $52.93 2,481,606 $51.22 2,252,498 $47.73 
Granted— — — — 322,460 74.11 
Exercised(1)
(473,452)46.46 (600,344)45.68 (66,697)39.77 
Forfeited(3,260)74.27 (8,709)66.96 (26,655)61.46 
Outstanding at end of year(2)
1,395,841 55.07 1,872,553 52.93 2,481,606 51.22 
Exercisable at end of year(3)
1,295,061 53.59 1,549,749 49.51 1,675,552 46.88 
(1)The total intrinsic value of options exercised in 2024, 2023 and 2022 was $18.0 million, $15.0 million and $1.6 million, respectively.
(2)The weighted average remaining contractual life of options outstanding was 6 years at December 31, 2024, and 7 years at December 31, 2023 and December 31, 2022, respectively. The aggregate intrinsic value of options outstanding at December 31, 2024 was $20.0 million.
(3)The weighted average remaining contractual life of options exercisable was 6 years at December 31, 2024, December 31, 2023, and December 31, 2022, respectively. The aggregate intrinsic value of options exercisable at December 31, 2024 was $20.0 million.
Schedule of Stock Unit Activity
Number of OptionsWeighted Avg. Per
Share Exercise Price
Nonvested options at beginning of year322,804 $69.33 
Vested(219,931)67.09 
Forfeited(2,093)74.27 
Nonvested options at end of year100,780 74.10 
A summary of stock unit activity under the Incentive Plan is as follows:
Number of UnitsWeighted-Average
Grant Date Value
Issued and unvested at January 1, 202434,758 $67.14 
Granted29,475 82.19 
Forfeited(6,124)75.48 
Performance adjustments16,289 80.76 
Issued and unvested at December 31, 202474,398 75.40 
Schedule of Weighted Average Fair Value per Option at Date of Grant Assumptions were as follows:
2022
Expected life (years)5.7
Risk-free interest rate1.9 %
Dividend yield1.5 %
Expected volatility26.8 %
Schedule of Share Unit Activity Under Plan
A summary of share unit activity under the Incentive Plan is as follows:
Number of UnitsWeighted-Average
Grant Date Value
Issued and unvested at January 1, 2024381,189 $63.33 
Granted195,497 82.31 
Vested(98,216)60.32 
Forfeited(9,201)73.49 
Issued and unvested at December 31, 2024469,269 71.50