UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 38,647	$ (194,096)
After Tax Amount
Net change in fair value of securities available for sale	(27,559)	292,031
Net change in fair value of cash flow hedges	(18,447)	21,678
Net change in accumulated other comprehensive income for defined benefit postretirement plans	(516)	(381)
Total other comprehensive (loss) income	(46,522)	313,328
Total comprehensive (loss) income	$ (7,875)	$ 119,232