Other Comprehensive Income - Changes in the Components of Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), pre-tax	$ 3,817		$ 1,129		$ 241	$ 23,431
Total other comprehensive income (loss), tax expense (benefit)	990		266		101	5,855
Other comprehensive income, net of tax	2,827	$ (2,687)	863	$ 16,713	140	17,576
Securities available for sale:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassifications, pre-tax	648		(21,283)		(5,544)	(569)
Other comprehensive income (loss) before reclassifications, tax expense (benefit)	180		(5,353)		(1,378)	(170)
Other comprehensive income (loss), before reclassifications, net of tax	468		(15,930)		(4,166)	(399)
Amortization of unrealized holding losses on securities transferred to held to maturity category, pre tax	3,252		3,026		6,527	6,154
Amortization of unrealized holding losses on securities transferred to held to maturity category, tax expense (benefit)	831		774		1,668	1,574
Amortization of unrealized holding losses on securities transferred to held to maturity category, net of tax	2,421		2,252		4,859	4,580
Reclassification from AOCI, pre-tax			22,438			22,438
Reclassification from AOCI, tax expense (benefit)			5,622			5,622
Reclassification from AOCI, net of tax			16,816			16,816
Total other comprehensive income (loss), pre-tax	3,900		4,181		983	28,023
Total other comprehensive income (loss), tax expense (benefit)	1,011		1,043		290	7,026
Other comprehensive income, net of tax	2,889		3,138		693	20,997
Derivative instruments:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassifications, pre-tax	(188)		(3,167)		(953)	(4,823)
Other comprehensive income (loss) before reclassifications, tax expense (benefit)	(47)		(806)		(242)	(1,230)
Other comprehensive income (loss), before reclassifications, net of tax	(141)		(2,361)		(711)	(3,593)
Total other comprehensive income (loss), pre-tax	(188)		(3,167)		(953)	(4,823)
Total other comprehensive income (loss), tax expense (benefit)	(47)		(806)		(242)	(1,230)
Other comprehensive income, net of tax	(141)		(2,361)		(711)	(3,593)
Amortization of net actuarial loss recognized in net periodic pension cost
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from AOCI, pre-tax	105		115		211	231
Reclassification from AOCI, tax expense (benefit)	26		29		53	59
Reclassification from AOCI, net of tax	79		86		158	172
Total defined benefit pension and post-retirement benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), pre-tax	105		115		211	231
Total other comprehensive income (loss), tax expense (benefit)	26		29		53	59
Other comprehensive income, net of tax	$ 79		$ 86		$ 158	$ 172