UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (6,188)	$ 59,113	$ 58,790	$ (86,326)
Other comprehensive income (loss), net of tax:
Net change in fair value of securities available for sale	121,498	(117,260)	93,545	116,285
Net change in fair value of cash flow hedges	37,197	(10,980)	20,244	(21,573)
Net change in other comprehensive income for defined benefit postretirement plans	(516)	(360)	(1,548)	(1,102)
Total other comprehensive income (loss)	158,179	(128,600)	112,241	93,610
Total comprehensive income (loss)	$ 151,991	$ (69,487)	$ 171,031	$ 7,284