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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 | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss on investment securities |  | $ 0 |  |  |  | $ 0 |  |  |  | $ 0 |  | $ 15 |
Interest income |  | 41,677 |  |  |  | 43,068 |  |  |  | 125,829 |  | 124,223 |
Income (loss) before income taxes |  | 16,462 |  |  |  | 18,579 |  |  |  | 48,117 |  | 56,512 |
Income tax expense |  | (2,440) |  |  |  | (4,725) |  |  |  | (7,633) |  | (12,027) |
Net income (loss) |  | 14,022 |  | $ 14,373 | $ 12,089 | 13,854 |  | $ 15,648 | $ 14,983 | 40,484 |  | 44,485 |
Securities Available for Sale and Transferred Securities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Reclassification, Pre-tax Amount |  | (16) | [1] |  |  | (23) | [2] |  |  | (51) | [1] | (95) | [2]
Reclassification tax |  | 4 | [1] |  |  | 7 | [2] |  |  | 13 | [1] | 25 | [2]
Total reclassified for the period |  | (12) | [1] |  |  | (16) | [2] |  |  | (38) | [1] | (70) | [2]
Prior Service Credit [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Reclassification, Pre-tax Amount | [3] | 123 |  |  |  | 0 |  |  |  | 368 |  | 0 |
Net Actuarial Losses [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Reclassification, Pre-tax Amount | [3] | (316) |  |  |  | (64) |  |  |  | (948) |  | (192) |
Pension And Post-Retirement Obligations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Reclassification, Pre-tax Amount |  | (193) |  |  |  | (64) |  |  |  | (580) |  | (192) |
Reclassification tax |  | 50 |  |  |  | 16 |  |  |  | 149 |  | 49 |
Total reclassified for the period |  | (143) |  |  |  | (48) |  |  |  | (431) |  | (143) |
Accumulated Other Comprehensive income [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total reclassified for the period |  | (155) |  |  |  | (64) |  |  |  | (469) |  | (213) |
Reclassification out of Accumulated Other Comprehensive (Loss) Income [Member] | Securities Available for Sale and Transferred Securities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss on investment securities |  | 0 |  |  |  | 0 |  |  |  | 0 |  | (15) |
Interest income |  | (16) |  |  |  | (23) |  |  |  | (51) |  | (80) |
Income (loss) before income taxes |  | (16) |  |  |  | (23) |  |  |  | (51) |  | (95) |
Income tax expense |  | 4 |  |  |  | 7 |  |  |  | 13 |  | 25 |
Net income (loss) |  | $ (12) |  |  |  | $ (16) |  |  |  | $ (38) |  | $ (70) |
[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] | 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.
[3] | These items are included in the computation of net periodic pension expense. See Note 13 – Employee Benefit Plans for additional information.

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