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Accumulated Other Comprehensive Income (Loss) (Amounts Reclassified Out of Each Component of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Net gain (loss) on investment securities |  | $ (3,576) | $ (15) | $ 71
Interest income |  | 165,715 | 167,372 | 154,730
Income (loss) before income taxes |  | 63,053 | 70,970 | 97,222
Income tax (expense) benefit |  | (12,789) | (14,397) | (19,525)
Net income (loss) |  | 50,264 | 56,573 | 77,697
Securities Available for Sale and Transferred Securities [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Reclassification before tax | [1] | (3,642) | (117) | (139)
Reclassification tax | [1] | 934 | 30 | 36
Total reclassified for the period | [1] | (2,708) | (87) | (103)
Prior Service Credit [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Reclassification before tax | [2] | 3,413 | 0 |
Net Actuarial Losses [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Reclassification before tax | [2] | (1,264) | (296) |
Pension And Post-Retirement Obligations [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Net income (loss) |  | (3,479) | (220) |
Reclassification before tax |  | (4,677) | (296) |
Reclassification tax |  | 1,198 | 76 |
Total reclassified for the period |  | (3,479) | (220) | (551)
AOCI Attributable to Parent [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total reclassified for the period |  | (6,187) | (307) | $ (654)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Securities Available for Sale and Transferred Securities [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Net gain (loss) on investment securities |  | (3,576) | (15) |
Interest income |  | (66) | (102) |
Income (loss) before income taxes |  | (3,642) | (117) |
Income tax (expense) benefit |  | 934 | 30 |
Total reclassified for the period |  | $ (2,708) | $ (87) |
[1] | Includes amounts related to the amortization/accretion of unrealized net gains and losses related to the Company’s reclassification of available for sale investment securities to the held to maturity category. The unrealized net gains/losses will be amortized/accreted over the remaining life of the investment securities as an adjustment of yield.
[2] | These items are included in the computation of net periodic pension expense. See Note 20, Employee Benefit Plans, for additional information.

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