UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (217,666)	$ 38,647
Other comprehensive income (loss), net of tax:
Net change in fair value of securities available for sale	251,318	(27,559)
Net change in fair value of cash flow hedges	10,367	(18,447)
Net change in other comprehensive income for defined benefit postretirement plans	(1,135)	(516)
Total other comprehensive income (loss)	260,550	(46,522)
Total comprehensive income (loss)	$ 42,884	$ (7,875)