Changes to Accumulated Other Comprehensive Income (Loss), net - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023		Mar. 31, 2022
Beginning Balance	$ 259,373	[1]	$ 277,139
Change in net unrealized holding gains (losses) on securities available for sale, net of deferred tax expense (benefit)	3,866		(17,844)
Ending Balance	257,586		278,482
Net Unrealized (Losses) Gains on Available for Sale Securities [Member]
Beginning Balance	(45,525)		(4,056)
Change in net unrealized holding gains (losses) on securities available for sale, net of deferred tax expense (benefit)	3,866		(17,844)
Ending Balance	(41,659)		(21,900)
Transfer of Securities Held to Maturity to Available For Sale [Member]
Beginning Balance	425		425
Change in net unrealized holding gains (losses) on securities available for sale, net of deferred tax expense (benefit)	0		0
Ending Balance	425		425
Pension and Post-retirement Benefit Plans[Member]
Beginning Balance	(1)		(1)
Change in net unrealized holding gains (losses) on securities available for sale, net of deferred tax expense (benefit)	0		0
Ending Balance	(1)		(1)
Accumulated Other Comprehensive (Loss) Income, net [Member]
Beginning Balance	(45,101)		(3,632)
Change in net unrealized holding gains (losses) on securities available for sale, net of deferred tax expense (benefit)	3,866		(17,844)
Ending Balance	$ (41,235)		$ (21,476)

[1] Derived from audited December 31, 2022 Consolidated Financial Statements.