Accumulated Other Comprehensive Income (Loss), Accumulated Other Comprehensive Income (Loss) Balances, Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended									9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021		Jun. 30, 2021		Mar. 31, 2021		Sep. 30, 2022	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	$ 594,632	$ 592,895	$ 601,128	$ 578,593		$ 571,031	[1]	$ 568,161	[1]	$ 601,128	$ 568,161	[1]
Other comprehensive loss - before reclassifications	(15,522)			(566)						(36,602)	(4,405)
Amount reclassified from accumulated other comprehensive income	(265)			30						(754)	(227)
Other comprehensive loss, net of tax	(15,787)	(7,053)	(14,516)	(536)		572		(4,668)		(37,356)	(4,632)
Balance	589,006	594,632	592,895	586,683	[1]	578,593		571,031	[1]	589,006	586,683	[1]
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	(9,422)	(2,369)	12,147	7,840		7,268	[1]	11,936	[1]	12,147	11,936	[1]
Other comprehensive loss, net of tax	(15,787)	(7,053)	(14,516)	(536)		572		(4,668)
Balance	(25,209)	(9,422)	(2,369)	7,304	[1]	7,840		7,268	[1]	(25,209)	7,304	[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	(21,106)		(26)	3,347				7,186		(26)	7,186
Other comprehensive loss - before reclassifications	(15,522)			(566)						(36,602)	(4,405)
Amount reclassified from accumulated other comprehensive income	0			0						0	0
Other comprehensive loss, net of tax	(15,522)			(566)						(36,602)	(4,405)
Balance	(36,628)	(21,106)		2,781		3,347				(36,628)	2,781
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		13,706	6,084				6,084		13,706	6,084
Other comprehensive loss - before reclassifications	0			0						0	0
Amount reclassified from accumulated other comprehensive income	0			0						0	0
Other comprehensive loss, net of tax	0			0						0	0
Balance	13,706	13,706		6,084		6,084				13,706	6,084
Net Change in Net Actuarial Gain 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	(2,022)		$ (1,533)	(1,591)				$ (1,334)		(1,533)	(1,334)
Other comprehensive loss - before reclassifications	0			0						0	0
Amount reclassified from accumulated other comprehensive income	(265)			30						(754)	(227)
Other comprehensive loss, net of tax	(265)			30						(754)	(227)
Balance	$ (2,287)	$ (2,022)		$ (1,561)		$ (1,591)				$ (2,287)	$ (1,561)

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