Other Comprehensive Income - Schedule of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Pre Tax Amount
Total other comprehensive income (loss)	$ (2,394)	$ (124,275)	$ (65,706)	$ 279,345
Tax Benefit (Expense)
Total other comprehensive income (loss)	2,978	33,157	19,768	(57,135)
After Tax Amount
Before reclassifications			(70,688)	(50,539)
Less: reclassification adjustments			(24,750)	(272,749)
Total other comprehensive income (loss)	584	(91,118)	(45,938)	222,210
Unrealized losses on securities available for sale:
Pre Tax Amount
Before reclassifications	(11,303)	(78,810)	(48,388)	(36,509)
Less: reclassification adjustments	(7,557)	0	(7,557)	(333,170)
Total other comprehensive income (loss)	(3,746)	(78,810)	(40,831)	296,661
Tax Benefit (Expense)
Before reclassifications	5,446	20,324	14,972	11,514
Less: reclassification adjustments	2,094	0	2,094	74,630
Total other comprehensive income (loss)	3,352	20,324	12,878	(63,116)
After Tax Amount
Before reclassifications	(5,857)	(58,486)	(33,416)	(24,995)
Less: reclassification adjustments	(5,463)	0	(5,463)	(258,540)
Total other comprehensive income (loss)	(394)	(58,486)	(27,953)	233,545
Unrealized losses on cash flow hedges:
Pre Tax Amount
Before reclassifications	(11,996)	(56,892)	(51,551)	(37,146)
Less: reclassification adjustments	(14,062)	(11,929)	(28,103)	(20,834)
Total other comprehensive income (loss)	2,066	(44,963)	(23,448)	(16,312)
Tax Benefit (Expense)
Before reclassifications	3,323	16,060	14,279	11,602
Less: reclassification adjustments	3,895	3,368	7,784	5,883
Total other comprehensive income (loss)	(572)	12,692	6,495	5,719
After Tax Amount
Before reclassifications	(8,673)	(40,832)	(37,272)	(25,544)
Less: reclassification adjustments	(10,167)	(8,561)	(20,319)	(14,951)
Total other comprehensive income (loss)	1,494	(32,271)	(16,953)	(10,593)
Defined benefit pension plans:
Pre Tax Amount
Total other comprehensive income (loss)	(714)	(502)	(1,427)	(1,004)
Tax Benefit (Expense)
Total other comprehensive income (loss)	198	141	395	262
After Tax Amount
Before reclassifications			0	0
Less: reclassification adjustments			1,032	742
Total other comprehensive income (loss)	(516)	(361)	(1,032)	(742)
Change in actuarial net loss
Pre Tax Amount
Before reclassifications	0	0	0	0
Tax Benefit (Expense)
Before reclassifications	0	0	0	0
After Tax Amount
Before reclassifications	0	0	0	0
Less: amortization of actuarial net loss
Pre Tax Amount
Less: reclassification adjustments	(1,775)	(2,468)	(3,550)	(4,936)
Tax Benefit (Expense)
Less: reclassification adjustments	492	697	984	1,394
After Tax Amount
Less: reclassification adjustments	(1,283)	(1,771)	(2,566)	(3,542)
Less: accretion of prior service credit
Pre Tax Amount
Less: reclassification adjustments	2,489	2,970	4,977	5,940
Tax Benefit (Expense)
Less: reclassification adjustments	(690)	(838)	(1,379)	(1,656)
After Tax Amount
Less: reclassification adjustments	$ 1,799	$ 2,132	$ 3,598	$ 4,284