Accumulated Other Comprehensive (Loss) Income - Schedule of Activity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
AOCI Attributable to Parent, Net of Tax
Balance, beginning	$ 3,020,281	$ 2,843,305
Other comprehensive income (loss) before reclassifications	2,020	57,863
Total other comprehensive income, net of tax	1,808	58,564
Balance, ending	3,110,707	2,926,904
Accumulated Other Compre- hensive (Loss) Income
AOCI Attributable to Parent, Net of Tax
Balance, beginning	(374,113)	(468,792)
Balance, ending	(372,305)	(410,228)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-For-Sale, Gains and Transfers Included in Net Income, and Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
AOCI Attributable to Parent, Net of Tax
Reclassification adjustments	(966)	(704)
(Losses) Gains on Available-For-Sale and Transferred Debt Securities
AOCI Attributable to Parent, Net of Tax
Balance, beginning	(377,728)	(474,338)
Other comprehensive income (loss) before reclassifications	1,527	57,890
Total other comprehensive income, net of tax	2,259	59,319
Balance, ending	(375,469)	(415,019)
Reclassification adjustments for gains and transfers included in net income
AOCI Attributable to Parent, Net of Tax
Reclassification adjustments	(22)	24
Reclassification adjustments for amortization included in net income for transferred securities
AOCI Attributable to Parent, Net of Tax
Reclassification adjustments	754	1,405
(Losses) Gains on Derivatives Used for Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax
Balance, beginning	3,615	5,546
Other comprehensive income (loss) before reclassifications	493	(27)
Reclassification adjustments	(944)	(728)
Total other comprehensive income, net of tax	(451)	(755)
Balance, ending	$ 3,164	$ 4,791