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Stockholders’ Equity and Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss)    
Balance at beginning of period $ 136,085 $ 127,411
Other comprehensive income (loss), before reclassifications 1,983 (10,541)
Amounts reclassified from accumulated other comprehensive income (loss) 0 0
Current period other comprehensive income (loss), before tax 1,983 (10,541)
Income tax (expense) benefit (416) 2,214
Current period other comprehensive income (loss), net of tax 1,567 (8,327)
Balance at end of period 146,474 118,404
Unrealized Gains (Losses) on Securities    
Accumulated Other Comprehensive Income (Loss)    
Balance at beginning of period (21,461) (36,657)
Other comprehensive income (loss), before reclassifications 2,501 (10,061)
Amounts reclassified from accumulated other comprehensive income (loss) 0 0
Current period other comprehensive income (loss), before tax 2,501 (10,061)
Income tax (expense) benefit (525) 2,113
Current period other comprehensive income (loss), net of tax 1,976 (7,948)
Balance at end of period (19,485) (44,605)
Unrecognized Net Pension and Postretirement Costs    
Accumulated Other Comprehensive Income (Loss)    
Balance at beginning of period 7,699 4,943
Other comprehensive income (loss), before reclassifications (518) (480)
Amounts reclassified from accumulated other comprehensive income (loss) 0 0
Current period other comprehensive income (loss), before tax (518) (480)
Income tax (expense) benefit 109 101
Current period other comprehensive income (loss), net of tax (409) (379)
Balance at end of period 7,290 4,564
Accumulated Other Comprehensive Income (Loss)    
Accumulated Other Comprehensive Income (Loss)    
Balance at beginning of period (13,762) (31,714)
Balance at end of period $ (12,195) $ (40,041)