Accumulated Other Comprehensive Income (Loss), Accumulated Other Comprehensive Income (Loss) Balances, Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	$ 601,128	$ 568,161	[1]
Other comprehensive income (loss) - before reclassifications	(14,251)	(4,461)
Amount reclassified from accumulated other comprehensive income	(265)	(207)
Other comprehensive income (loss), net of tax	(14,516)	(4,668)
Balance	592,895	571,031	[1]
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	12,147	11,936	[1]
Other comprehensive income (loss), net of tax	(14,516)	(4,668)
Balance	(2,369)	7,268	[1]
Net Unrealized Holding Loss on Securities Available for Sale, Net of Tax [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	(26)	7,186
Other comprehensive income (loss) - before reclassifications	(14,251)	(4,461)
Amount reclassified from accumulated other comprehensive income	0	0
Other comprehensive income (loss), net of tax	(14,251)	(4,461)
Balance	(14,277)	2,725
Net Change in Overfunded Position in Pension and Postretirement Plans Arising During the Year, Net of Tax [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	13,706	6,084
Other comprehensive income (loss) - before reclassifications	0	0
Amount reclassified from accumulated other comprehensive income	0	0
Other comprehensive income (loss), net of tax	0	0
Balance	13,706	6,084
Net Change in Net Actuarial (Gain) Loss and Prior Service Credit on Pension and Postretirement Benefit Plans, Net of Tax [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	(1,533)	(1,334)
Other comprehensive income (loss) - before reclassifications	0	0
Amount reclassified from accumulated other comprehensive income	(265)	(207)
Other comprehensive income (loss), net of tax	(265)	(207)
Balance	$ (1,798)	$ (1,541)

[1] All periods presented have been adjusted for the 1 for 5 reverse stock split which occurred on May 28, 2021.