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Stockholders’ Equity and Accumulated Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Accumulated Other Comprehensive Income (Loss) |  |  |  |
Balance at beginning of period | $ 156,823 | $ 138,241 | $ 149,547 | $ 136,085
Other comprehensive income (loss), before reclassifications |  |  | 5,222 | 1,983
Amounts reclassified from accumulated other comprehensive income (loss) |  |  | 0 | 0
Current period other comprehensive income (loss), before tax |  |  | 5,222 | 1,983
Income tax (expense) benefit |  |  | (1,097) | (416)
Current period other comprehensive income (loss), net of tax | 3,571 | 5,038 | 4,125 | 1,567
Balance at end of period | 164,938 | 146,474 | 164,938 | 146,474
Unrealized Gains (Losses) on Securities |  |  |  |
Accumulated Other Comprehensive Income (Loss) |  |  |  |
Balance at beginning of period |  |  | (24,416) | (21,461)
Other comprehensive income (loss), before reclassifications |  |  | 6,179 | 2,501
Amounts reclassified from accumulated other comprehensive income (loss) |  |  | 0 | 0
Current period other comprehensive income (loss), before tax |  |  | 6,179 | 2,501
Income tax (expense) benefit |  |  | (1,298) | (525)
Current period other comprehensive income (loss), net of tax |  |  | 4,881 | 1,976
Balance at end of period | (19,535) | (19,485) | (19,535) | (19,485)
Unrecognized Net Pension and Postretirement (Income) Costs |  |  |  |
Accumulated Other Comprehensive Income (Loss) |  |  |  |
Balance at beginning of period |  |  | 11,973 | 7,699
Other comprehensive income (loss), before reclassifications |  |  | (957) | (518)
Amounts reclassified from accumulated other comprehensive income (loss) |  |  | 0 | 0
Current period other comprehensive income (loss), before tax |  |  | (957) | (518)
Income tax (expense) benefit |  |  | 201 | 109
Current period other comprehensive income (loss), net of tax |  |  | (756) | (409)
Balance at end of period | 11,217 | 7,290 | 11,217 | 7,290
Accumulated Other Comprehensive Income (Loss) |  |  |  |
Accumulated Other Comprehensive Income (Loss) |  |  |  |
Balance at beginning of period | (11,889) | (17,233) | (12,443) | (13,762)
Current period other comprehensive income (loss), net of tax | 3,571 | 5,038 | 4,125 | 1,567
Balance at end of period | $ (8,318) | $ (12,195) | $ (8,318) | $ (12,195)

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