Other Comprehensive Income (Loss) - Changes in Components of OCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), pre-tax	$ (264,687)	$ (47,635)	$ 32,600
Total other comprehensive income (loss), tax expense (benefit)	(66,093)	(12,124)	8,296
Other comprehensive (loss) income, net of tax	(198,594)	(35,511)	24,304
Securities available for sale:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income gain (loss), before reclassifications, pre-tax	(285,829)	(51,470)	27,788
Other comprehensive income gain (loss) before reclassifications, tax expense (benefit)	(71,478)	(13,099)	7,071
Other comprehensive income gain (loss), before reclassifications, net of tax	(214,351)	(38,371)	20,717
Reclassification from AOCI, pre-tax		(2,170)	(46)
Reclassification from AOCI, tax expense (benefit)		(552)	(12)
Reclassification from AOCI, net of tax		(1,618)	(34)
Total other comprehensive income (loss), pre-tax	(280,865)	(53,713)	27,742
Total other comprehensive income (loss), tax expense (benefit)	(70,215)	(13,670)	7,059
Other comprehensive (loss) income, net of tax	(210,650)	(40,043)	20,683
Amortization of unrealized holding gains (losses) on securities transferred to the held to maturity category
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from AOCI, pre-tax	4,964	(73)
Reclassification from AOCI, tax expense (benefit)	1,263	(19)
Reclassification from AOCI, net of tax	3,701	(54)
Derivative instruments:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income gain (loss), before reclassifications, pre-tax	20,118	10,848	923
Other comprehensive income gain (loss) before reclassifications, tax expense (benefit)	5,125	2,761	235
Other comprehensive income gain (loss), before reclassifications, net of tax	14,993	8,087	688
Reclassification from AOCI, pre-tax		(4,676)	2,040
Reclassification from AOCI, tax expense (benefit)		(1,190)	519
Reclassification from AOCI, net of tax		(3,486)	1,521
Total other comprehensive income (loss), pre-tax	20,118	6,172	2,963
Total other comprehensive income (loss), tax expense (benefit)	5,125	1,571	754
Other comprehensive (loss) income, net of tax	14,993	4,601	2,209
Net gain (loss) arising during the period
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income gain (loss), before reclassifications, pre-tax	(4,107)	(356)	1,069
Other comprehensive income gain (loss) before reclassifications, tax expense (benefit)	(1,045)	(92)	272
Other comprehensive income gain (loss), before reclassifications, net of tax	(3,062)	(264)	797
Reclassification adjustment for settlement loss related to the VERP realized in net income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from AOCI, pre-tax			567
Reclassification from AOCI, tax expense (benefit)			145
Reclassification from AOCI, net of tax			422
New prior service cost
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from AOCI, pre-tax			(485)
Reclassification from AOCI, tax expense (benefit)			(123)
Reclassification from AOCI, net of tax			(362)
Amortization of net actuarial loss recognized in net periodic pension cost
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from AOCI, pre-tax	167	262	259
Reclassification from AOCI, tax expense (benefit)	42	67	66
Reclassification from AOCI, net of tax	125	195	193
Amortization of prior service cost
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from AOCI, pre-tax			485
Reclassification from AOCI, tax expense (benefit)			123
Reclassification from AOCI, net of tax			362
Total defined benefit pension and post-retirement benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), pre-tax	(3,940)	(94)	1,895
Total other comprehensive income (loss), tax expense (benefit)	(1,003)	(25)	483
Other comprehensive (loss) income, net of tax	$ (2,937)	$ (69)	$ 1,412