CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - 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	$ 70,424	$ 139,060	$ 166,704	$ 285,611
Unrealized losses and gains on available for sale securities
Net losses arising during the period	(5,600)	(18,051)	(15,805)	(881)
Less reclassification adjustment for net losses included in net income	8	0	8	0
Total	(5,592)	(18,051)	(15,797)	(881)
Unrealized gains and losses on derivatives (cash flow hedges)
Net losses on derivatives arising during the period	0	(3,573)	0	(775)
Less reclassification adjustment for net (gains) losses included in net income	(210)	516	(432)	895
Total	(210)	(3,057)	(432)	120
Defined benefit pension and postretirement benefit plans
Amortization of actuarial net loss	37	8	72	16
Other comprehensive (loss) income, net	(5,765)	(21,100)	(16,157)	(745)
Total comprehensive income	$ 64,659	$ 117,960	$ 150,547	$ 284,866