Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 233,968	$ 95,713	$ 399,532	$ 297,826
Other comprehensive (loss) income, net of tax:
Investment securities available-for-sale	(242,231)	(3,394)	(692,383)	(35,220)
Derivative instruments	(13,699)	(1,731)	(21,851)	(7,755)
Defined benefit pension and other postretirement benefit plans	361	743	(87)	2,227
Other comprehensive (loss), net of tax	(255,569)	(4,382)	(714,321)	(40,748)
Comprehensive (loss) income	$ (21,601)	$ 91,331	$ (314,789)	$ 257,078