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Stock Compensation Plans and Other Employee Benefit Plans (Tables)
12 Months Ended
Dec. 31, 2025
Share-Based Payment Arrangement, Noncash Expense [Abstract]  
Schedule of Stock Option Activity
A summary of the Plans’ stock option activity for the years ended December 31, 2025, 2024 and 2023 is as follows:
Stock OptionsCommon
Shares
Weighted Average
Strike Price
Remaining
Contractual Term(1)
Intrinsic Value(2)
($000)
Outstanding at January 1, 2023
68,093 $41.14 
Exercised(54,993)40.75 
Outstanding at December 31, 2023
13,100 $42.76 4.2$655 
Exercisable at December 31, 2023
13,100 $42.76 4.2$655 
Outstanding at January 1, 2024
13,100 $42.76 
Exercised(2,275)38.00 
Outstanding at December 31, 2024
10,825 $43.76 3.5$876 
Exercisable at December 31, 2024
10,825 $43.76 3.5$876 
Outstanding at January 1, 2025
10,825 $43.76 
Exercised(5,150)42.61 
Outstanding at December 31, 2025
5,675 $44.81 2.7$539 
Exercisable at December 31, 2025
5,675 $44.81 2.7$539 
Vested or expected to vest at December 31, 2025
5,675 $44.81 2.7$539 
(1)Represents the weighted average contractual remaining life in years.
(2)Aggregate intrinsic value represents the total pretax intrinsic value (i.e., the difference between the Company’s stock price at year end and the option exercise price, multiplied by the number of shares) that would have been received by the option holders if they had exercised their options on the last day of the year. Options with exercise prices above the year end stock price are excluded from the calculation of intrinsic value. The intrinsic value will change based on the fair market value of the Company’s stock.
Schedule of Plans' Restricted and Performance Share Award Activity
A summary of the Plans’ restricted share activity for the years ended December 31, 2025, 2024 and 2023 is as follows:
 
 202520242023
Restricted SharesCommon
Shares
Weighted
Average
Grant-Date
Fair Value
Common
Shares
Weighted
Average
Grant-Date
Fair Value
Common
Shares
Weighted
Average
Grant-Date
Fair Value
Outstanding at January 1880,866 $90.95 746,123 $79.60 610,155 $73.21 
Granted262,521 132.46 407,046 99.89 270,855 88.06 
Vested and issued(224,769)94.65 (241,415)70.41 (121,534)65.90 
Forfeited or canceled(30,220)110.10 (30,888)95.26 (13,353)83.68 
Outstanding at end of year888,398 $101.63 880,866 $90.95 746,123 $79.60 
Vested, but deferred, at year end102,218 $55.59 100,610 $54.46 98,919 $53.58 

A summary of the Plans’ performance-based stock award activity, based on the target level of the awards, for the years ended December 31, 2025, 2024 and 2023 is as follows:
 202520242023
Performance SharesCommon
Shares
Weighted
Average
Grant-Date
Fair Value
Common
Shares
Weighted
Average
Grant-Date
Fair Value
Common
Shares
Weighted
Average
Grant-Date
Fair Value
Outstanding at January 1454,017 $93.57 553,026 $79.69 545,379 $70.30 
Granted88,310 134.57 111,469 100.47 189,355 92.36 
Added by performance factor at vesting75,461 96.51 96,952 58.78 23,925 62.82 
Vested and issued(230,957)95.26 (295,644)58.69 (186,344)62.67 
Forfeited or canceled(9,074)105.85 (11,786)95.97 (19,289)81.84 
Outstanding at end of year377,757 $102.38 454,017 $93.57 553,026 $79.69 
Vested, but deferred, at year end13,335 $41.21 21,759 $44.51 29,020 $45.88