Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other comprehensive (loss) income, net of tax:
Net income	$ 408,864	$ 220,621	$ 382,723
Investment securities available-for-sale	(62,888)	50,173	88,625
Derivative instruments	(13,848)	29,102	129
Total defined benefit pension and postretirement benefit plans	11,900	(947)	5,826
Other comprehensive (loss) income, net of tax	(64,836)	78,328	94,580
Comprehensive income	$ 344,028	$ 298,949	$ 477,303