Accumulated Other Comprehensive (Loss) - Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Loss
Net unrealized loss on investment securities available for sale	$ (51,527)	$ (66,250)
Income tax benefit	(11,270)	(14,266)
Net of income taxes	(40,257)	(51,984)
Benefit plan adjustments	(4,370)	(5,499)
Income tax benefit	(956)	(1,184)
Net of income taxes	(3,414)	(4,315)
Derivative adjustments	(871)	(47)
Income tax benefit	(191)	(10)
Net of income taxes	(680)	(37)
Accumulated other comprehensive loss	$ (44,351)	$ (56,336)