Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 6,185	$ 9,130	$ 9,570	$ 29,517
Other comprehensive income (loss), net of tax:
Unrealized loss on debt securities available for sale	31,002	(20,217)	25,561	(3,984)
Accretion of unrealized (loss) gain on debt securities reclassified as held to maturity	(1)	(1)	4	(9)
Reclassification adjustment for loss included in net income	0	0	(903)	(7,779)
Total other comprehensive (loss) income, net of tax	31,001	(20,218)	24,662	(11,772)
Derivatives, net of tax:
Unrealized (loss) gain on swap contracts accounted for as cash flow hedges	(6,534)	1,845	(2,476)	3,863
Total derivative, net of tax	(6,534)	1,845	(2,476)	3,863
Employee benefit plans, net of tax:
Amortization of prior service cost included in net income	(10)	(10)	(30)	(30)
Reclassification adjustment of actuarial net (loss) gain included in net income	(394)	1	(1,170)	2
Change in funded status of retirement obligations	433	15	6,763	2,695
Total employee benefit plans, net of tax	29	6	5,563	2,667
Total other comprehensive income (loss)	24,496	(18,367)	27,749	(5,242)
Total comprehensive income (loss), net of tax	$ 30,681	$ (9,237)	$ 37,319	$ 24,275