Other Comprehensive Income (Loss) - Changes in the Components of Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), pre-tax	$ (3,576)	$ 22,302
Total other comprehensive income (loss), tax expense (benefit)	(889)	5,589
Other comprehensive (loss) income, net of tax	(2,687)	16,713
Securities available for sale:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassifications, pre-tax	(6,192)	20,714
Other comprehensive income (loss) before reclassifications, tax expense (benefit)	(1,558)	5,183
Other comprehensive income (loss), before reclassifications, net of tax	(4,634)	15,531
Amortization of unrealized holding losses on securities transferred to held to maturity category, pre tax	3,275	3,128
Amortization of unrealized holding losses on securities transferred to held to maturity category, tax expense (benefit)	837	800
Amortization of unrealized holding losses on securities transferred to held to maturity category, net of tax	2,438	2,328
Total other comprehensive income (loss), pre-tax	(2,917)	23,842
Total other comprehensive income (loss), tax expense (benefit)	(721)	5,983
Other comprehensive (loss) income, net of tax	(2,196)	17,859
Derivative instruments:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassifications, pre-tax	(765)	(1,656)
Other comprehensive income (loss) before reclassifications, tax expense (benefit)	(195)	(424)
Other comprehensive income (loss), before reclassifications, net of tax	(570)	(1,232)
Total other comprehensive income (loss), pre-tax	(765)	(1,656)
Total other comprehensive income (loss), tax expense (benefit)	(195)	(424)
Other comprehensive (loss) income, net of tax	(570)	(1,232)
Amortization of net actuarial loss recognized in net periodic pension cost
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from AOCI, pre-tax	106	116
Reclassification from AOCI, tax expense (benefit)	27	30
Reclassification from AOCI, net of tax	79	86
Total defined benefit pension and post-retirement benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), pre-tax	106	116
Total other comprehensive income (loss), tax expense (benefit)	27	30
Other comprehensive (loss) income, net of tax	$ 79	$ 86