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Accumulated Other Comprehensive Loss - Other Comprehensive Income (Loss) and Related Tax Effects (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Accumulated Other Comprehensive Loss      
Unrealized gain (loss) on investment securities available for sale $ 2,569 $ 14,804 $ (66,435)
Net (gain) loss on the sale of investment securities available for sale (1) (81) 1,976
Other comprehensive income (loss) on available for sale debt securities 2,568 14,723 (64,459)
Amortization of actuarial loss 141 194 198
Actuarial gain 1,377 935 172
Net change in benefit plan liabilities 1,518 1,129 370
Net change in derivatives 632 (824) (728)
Other comprehensive income (loss) 4,718 15,028 (64,817)
Income tax expense (benefit) 1,062 3,043 (13,995)
Other comprehensive income (loss) $ 3,656 $ 11,985 $ (50,822)