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Comprehensive Income (Loss), Net of Tax - Changes in Accumulated Other Comprehensive Income By Component (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning balance | $ 353,538 | $ 371,186 | $ 334,392
Other comprehensive income (loss) before reclassifications | 8,897 | (50,364) | 1,016
Amounts reclassified from accumulated other comprehensive income (loss) | 7,342 | 362 | 147
Other Comprehensive Income (Loss) | 16,239 | (50,002) | 1,163
Ending balance | 379,772 | 353,538 | 371,186
Accumulated Other Comprehensive Income (Loss) |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning balance | (49,655) | 347 | (816)
Other Comprehensive Income (Loss) | 16,239 | (50,002) | 1,163
Ending balance | (33,416) | (49,655) | 347
Unrealized Gains And Losses On Available-for-Sale Securities |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning balance | (48,841) | (614) | 5,799
Other comprehensive income (loss) before reclassifications | 10,441 | (48,227) | (6,413)
Amounts reclassified from accumulated other comprehensive income (loss) | 6,752 | 0 | 0
Other Comprehensive Income (Loss) | 17,193 | (48,227) | (6,413)
Ending balance | (31,648) | (48,841) | (614)
Unrealized Gain on Cash Flow Swap |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning balance | 4,054 | 1,320 | 485
Other comprehensive income (loss) before reclassifications | (2,900) | 2,582 | 929
Amounts reclassified from accumulated other comprehensive income (loss) | 557 | 152 | (94)
Other Comprehensive Income (Loss) | (2,343) | 2,734 | 835
Ending balance | 1,711 | 4,054 | 1,320
Net Actuarial Gain (Loss) |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning balance | (4,467) | 639 | (5,929)
Other comprehensive income (loss) before reclassifications | 1,747 | (5,147) | 6,500
Amounts reclassified from accumulated other comprehensive income (loss) | (119) | 41 | 68
Other Comprehensive Income (Loss) | 1,628 | (5,106) | 6,568
Ending balance | (2,839) | (4,467) | 639
Amortization of Net Retirement Plan Prior Service Cost |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning balance | (401) | (998) | (1,171)
Other comprehensive income (loss) before reclassifications | (391) | 428 | 0
Amounts reclassified from accumulated other comprehensive income (loss) | 152 | 169 | 173
Other Comprehensive Income (Loss) | (239) | 597 | 173
Ending balance | $ (640) | $ (401) | $ (998)

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