UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 26,331	$ 48,657	$ 64,978	$ (145,439)
Other comprehensive income (loss), net of tax:
Net change in fair value of securities available for sale	(394)	(58,486)	(27,953)	233,545
Net change in fair value of cash flow hedges	1,494	(32,271)	(16,953)	(10,593)
Net change in other comprehensive income for defined benefit postretirement plans	(516)	(361)	(1,032)	(742)
Total other comprehensive income (loss)	584	(91,118)	(45,938)	222,210
Total comprehensive income (loss)	$ 26,915	$ (42,461)	$ 19,040	$ 76,771