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Accumulated Other Comprehensive Loss - Other Comprehensive Income (Loss) and Related Tax Effects (Details) - USD ($) $ in Thousands | 12 Months Ended
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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)

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