Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 113,531	$ 114,557	$ 233,035	$ 223,169
Other comprehensive income (loss) before income taxes:
Net change in unrealized loss on securities available for sale, cash flow hedges and equity method investment	48,271	(20,352)	157,783	(98,151)
Reclassification of net loss realized and included in earnings	9,668	14,148	19,083	27,725
Valuation adjustments to employee benefit plans				22,014
Amortization of unrealized net loss on securities transferred to held to maturity	387	390	792	818
Other comprehensive income (loss) before income taxes	58,326	(5,814)	177,658	(47,594)
Income tax expense (benefit)	13,181	(1,393)	41,393	(10,785)
Other comprehensive income (loss) net of income taxes	45,145	(4,421)	136,265	(36,809)
Comprehensive income	$ 158,676	$ 110,136	$ 369,300	$ 186,360