Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 114,557	$ 117,794	$ 223,169	$ 244,261
Other comprehensive income (loss) before income taxes:
Net change in unrealized loss on securities available for sale, cash flow hedges and equity method investment	(20,352)	(103,503)	(98,151)	(2,559)
Reclassification of loss realized and included in earnings	14,148	11,245	27,725	20,765
Valuation adjustments to employee benefit plans	0	(5,685)	22,014	(7,521)
Amortization of unrealized net loss on securities transferred to held to maturity	390	428	818	922
Other comprehensive income (loss) before income taxes	(5,814)	(97,515)	(47,594)	11,607
Income tax expense (benefit)	(1,393)	(22,194)	(10,785)	2,211
Other comprehensive income (loss) net of income taxes	(4,421)	(75,321)	(36,809)	9,396
Comprehensive income	$ 110,136	$ 42,473	$ 186,360	$ 253,657