Accumulated Other Comprehensive (Loss) Income - Components of Accumulated Other Comprehensive (Loss) Income, Net of Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning balance			$ (62,104)
Other comprehensive (loss) income	$ (10,552)	$ (22,204)	(9,482)	$ (48,632)
Ending balance	(71,586)		(71,586)
Net Unrealized Holding (Losses) Gains on Available-for-Sale Investment Securities [Member]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning balance			(40,066)	(1,216)
Other comprehensive (loss) income			(7,911)	(42,232)
Ending balance	(47,977)	(43,448)	(47,977)	(43,448)
Net Change Related to Derivatives Used for Cash Flow Hedge [Member]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning balance			(6,831)	(159)
Other comprehensive (loss) income			(2,154)	(6,917)
Ending balance	(8,985)	(7,076)	(8,985)	(7,076)
Net Change Related to Defined Benefit Pension Plan [Member]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning balance			(15,207)	(14,978)
Other comprehensive (loss) income			583	517
Ending balance	(14,624)	(14,461)	(14,624)	(14,461)
Accumulated Other Comprehensive (Loss) Income [Member]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning balance			(62,104)	(16,353)
Other comprehensive (loss) income	(10,552)	(22,204)	(9,482)	(48,632)
Ending balance	$ (71,586)	$ (64,985)	$ (71,586)	$ (64,985)