Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (16,747)	$ 108,078
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Investment securities available-for-sale	(244,879)	(30,353)
Derivative instruments	(7,844)	(4,372)
Defined benefit pension and other postretirement benefit plans	(420)	743
Other comprehensive (loss), net of tax	(253,143)	(33,982)
Comprehensive (loss) income	$ (269,890)	$ 74,096