v3.26.1
Accumulated Other Comprehensive Income (Loss) - Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Details) - Reclassification Out of Accumulated Other Comprehensive Loss [Member] - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Amortization of pension and postretirement benefit items:        
Net income $ 540 $ 541 $ 1,057 $ 760
Amortization of Net Actuarial Gain [Member]        
Amortization of pension and postretirement benefit items:        
Salaries and employee benefits 733 737 1,434 1,034
Amortization of Prior Service Cost [Member]        
Amortization of pension and postretirement benefit items:        
Salaries and employee benefits (3) (4) (6) (7)
Amortization of Pension and Postretirement Benefit Items [Member]        
Amortization of pension and postretirement benefit items:        
Income tax benefit (190) (192) (371) (267)
Net income $ 540 $ 541 $ 1,057 $ 760