Other Comprehensive Income (Loss) - Schedule of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Pre Tax Amount
Total other comprehensive income (loss)	$ 355,835	$ (63,312)
Tax (Expense) Benefit
Total other comprehensive income (loss)	(95,285)	16,790
After Tax Amount
Before reclassifications	(26,378)	(56,158)
Less: reclassification adjustments	(286,928)	(9,636)
Total other comprehensive income (loss)	260,550	(46,522)
Unrealized gains (losses) on securities available for sale:
Pre Tax Amount
Before reclassifications	73,429	(37,085)
Less: reclassification adjustments	(269,638)	0
Total other comprehensive income (loss)	343,067	(37,085)
Tax (Expense) Benefit
Before reclassifications	(104,438)	9,526
Less: reclassification adjustments	(12,689)	0
Total other comprehensive income (loss)	(91,749)	9,526
After Tax Amount
Before reclassifications	(31,009)	(27,559)
Less: reclassification adjustments	(282,327)	0
Total other comprehensive income (loss)	251,318	(27,559)
Unrealized gains (losses) on cash flow hedges:
Pre Tax Amount
Before reclassifications	6,405	(39,555)
Less: reclassification adjustments	(7,933)	(14,041)
Total other comprehensive income (loss)	14,338	(25,514)
Tax (Expense) Benefit
Before reclassifications	(1,774)	10,956
Less: reclassification adjustments	2,197	3,889
Total other comprehensive income (loss)	(3,971)	7,067
After Tax Amount
Before reclassifications	4,631	(28,599)
Less: reclassification adjustments	(5,736)	(10,152)
Total other comprehensive income (loss)	10,367	(18,447)
Defined benefit pension plans:
Pre Tax Amount
Total other comprehensive income (loss)	(1,570)	(713)
Tax (Expense) Benefit
Total other comprehensive income (loss)	435	197
After Tax Amount
Before reclassifications	0	0
Less: reclassification adjustments	1,135	516
Total other comprehensive income (loss)	(1,135)	(516)
Change in actuarial net loss
Pre Tax Amount
Before reclassifications	0	0
Tax (Expense) Benefit
Before reclassifications	0	0
After Tax Amount
Before reclassifications	0	0
Less: amortization of actuarial net loss
Pre Tax Amount
Less: reclassification adjustments	(925)	(1,775)
Tax (Expense) Benefit
Less: reclassification adjustments	256	492
After Tax Amount
Less: reclassification adjustments	(669)	(1,283)
Less: accretion of prior service credit
Pre Tax Amount
Less: reclassification adjustments	2,495	2,488
Tax (Expense) Benefit
Less: reclassification adjustments	(691)	(689)
After Tax Amount
Less: reclassification adjustments	$ 1,804	$ 1,799