Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Accumulated Other Comprehensive Income (Loss)
Beginning balance	$ 127,411	$ 148,956
Other comprehensive income (loss), before reclassifications	5,571	(24,787)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Current period other comprehensive income (loss), before tax	5,571	(24,787)
Income tax (expense) benefit	(1,170)	5,205
Current period other comprehensive income (loss), net of tax	4,401	(19,582)
Ending balance	128,352	134,387
Unrealized Gains (Losses) on Securities
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(36,657)	362
Other comprehensive income (loss), before reclassifications	5,713	(24,787)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Current period other comprehensive income (loss), before tax	5,713	(24,787)
Income tax (expense) benefit	(1,200)	5,205
Current period other comprehensive income (loss), net of tax	4,513	(19,582)
Ending balance	(32,144)	(19,220)
Unrecognized Net Pension and Postretirement Costs
Accumulated Other Comprehensive Income (Loss)
Beginning balance	4,943	2,931
Other comprehensive income (loss), before reclassifications	(142)	0
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Current period other comprehensive income (loss), before tax	(142)	0
Income tax (expense) benefit	30	0
Current period other comprehensive income (loss), net of tax	(112)	0
Ending balance	4,831	2,931
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(31,714)	3,293
Ending balance	$ (27,313)	$ (16,289)