Accumulated Other Comprehensive (Loss) Income - Schedule of Activity (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
AOCI Attributable to Parent, Net of Tax
Balance, beginning	$ 3,020,281	$ 2,843,305
Other comprehensive income before reclassifications	19,883	37,159
Net current period other comprehensive income (loss)	19,462	38,005
Balance, ending	3,137,445	2,926,526
Accumulated Other Compre- hensive (Loss) Income
AOCI Attributable to Parent, Net of Tax
Balance, beginning	(374,113)	(468,792)
Balance, ending	(354,651)	(430,787)
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	(1,932)	(1,536)
(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 before reclassifications	19,188	35,749
Net current period other comprehensive income (loss)	20,677	38,155
Balance, ending	(357,051)	(436,183)
Reclassification adjustments for gains (losses) 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	1,511	2,382
(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 before reclassifications	695	1,410
Reclassification adjustments	(1,910)	(1,560)
Net current period other comprehensive income (loss)	(1,215)	(150)
Balance, ending	$ 2,400	$ 5,396