Stockholders’ Equity and Accumulated Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period	$ 153,411	$ 136,620	$ 149,547	$ 136,085
Other comprehensive income (loss), before reclassifications			701	(4,393)
Amounts reclassified from accumulated other comprehensive income (loss)			0	0
Current period other comprehensive income (loss), before tax			701	(4,393)
Income tax (expense) benefit			(147)	922
Current period other comprehensive income (loss), net of tax	386	(1,130)	554	(3,471)
Balance at end of period	156,823	138,241	156,823	138,241
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			1,339	(4,048)
Amounts reclassified from accumulated other comprehensive income (loss)			0	0
Current period other comprehensive income (loss), before tax			1,339	(4,048)
Income tax (expense) benefit			(281)	850
Current period other comprehensive income (loss), net of tax			1,058	(3,198)
Balance at end of period	(23,358)	(24,659)	(23,358)	(24,659)
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			(638)	(345)
Amounts reclassified from accumulated other comprehensive income (loss)			0	0
Current period other comprehensive income (loss), before tax			(638)	(345)
Income tax (expense) benefit			134	72
Current period other comprehensive income (loss), net of tax			(504)	(273)
Balance at end of period	11,469	7,426	11,469	7,426
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period	(12,275)	(16,103)	(12,443)	(13,762)
Current period other comprehensive income (loss), net of tax	386	(1,130)	554	(3,471)
Balance at end of period	$ (11,889)	$ (17,233)	$ (11,889)	$ (17,233)