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Stock and Incentive Compensation Plans - Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Number of Shares        
Outstanding at beginning of period (in shares) 225,834 353,473 353,473  
Exercised (in shares) (22,670) (46,009)    
Expired and forfeited (in shares) (1,820) (45,680)    
Outstanding at end of period (in shares) 201,344 261,784 225,834 353,473
Outstanding and exercisable (in shares) 201,344 261,784    
Weighted Average Exercise Price        
Outstanding at beginning of period (in dollars per share) $ 32.24 $ 31.49 $ 31.49  
Exercised (in dollars per share) 29.36 27.80    
Expired and forfeited (in dollars per share) 37.28 35.52    
Outstanding at end of period (in dollars per share) 32.52 31.43 $ 32.24 $ 31.49
Outstanding and exercisable (in dollars per share) $ 32.52 $ 31.43    
Weighted average remaining contractual term (in years) 2 years 11 months 26 days 3 years 8 months 19 days 3 years 8 months 19 days 4 years 5 months 15 days
Weighted average remaining contractual term, outstanding and exercisable (in years) 2 years 11 months 26 days 3 years 8 months 19 days    
Aggregate Intrinsic Value $ 635 $ 758 $ 614 $ 1,670
Aggregate Intrinsic Value, exercised 178 282    
Aggregate Intrinsic Value, outstanding and exercisable $ 635 $ 758