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Stockholders' Equity and Accumulated Other Comprehensive Income (Loss) - (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Stockholders' equity |  |
Beginning balance | $ 136,085 | $ 127,411
Other comprehensive income (loss), before reclassifications | (4,430) | 9,447
Amounts reclassified from accumulated other comprehensive income (loss) | 6,100 | 13,277
Other comprehensive income, before tax | 1,670 | 22,724
Income tax expense | (351) | (4,772)
Other comprehensive income, net of tax | 1,319 | 17,952
Ending balance | 149,547 | 136,085
Unrealized Income (Loss) on Securities |  |
Stockholders' equity |  |
Beginning balance | (21,461) | (36,657)
Other comprehensive income (loss), before reclassifications | (3,740) | 10,087
Amounts reclassified from accumulated other comprehensive income (loss) | 0 | 9,148
Other comprehensive income, before tax | (3,740) | 19,235
Income tax expense | 785 | (4,039)
Other comprehensive income, net of tax | (2,955) | 15,196
Ending balance | (24,416) | (21,461)
Unrecognized Net Pension and Postretirement Costs |  |
Stockholders' equity |  |
Beginning balance | 7,699 | 4,943
Other comprehensive income (loss), before reclassifications | (690) | (640)
Amounts reclassified from accumulated other comprehensive income (loss) | 6,100 | 4,129
Other comprehensive income, before tax | 5,410 | 3,489
Income tax expense | (1,136) | (733)
Other comprehensive income, net of tax | 4,274 | 2,756
Ending balance | 11,973 | 7,699
Accumulated Other Comprehensive Income (Loss) |  |
Stockholders' equity |  |
Beginning balance | (13,762) | (31,714)
Ending balance | $ (12,443) | $ (13,762)

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