CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 380,271	$ 498,511	$ 568,851
Unrealized losses and gains on available for sale debt securities
Net (losses) gains arising during the period	(18,397)	12,950	(136,981)
Amounts reclassified to earnings	1	(634)	(23)
Total	(18,396)	12,316	(137,004)
Unrealized gains and losses on derivatives (cash flow hedges)
Net (losses) gains on derivatives arising during the period	0	(757)	3,362
Amounts reclassified to earnings	(869)	638	203
Total	(869)	(119)	3,565
Defined benefit pension and postretirement benefit plans
Net gains (losses) arising during the period	10,609	5,442	(13,175)
Amortization of prior service cost	(97)	(90)	(100)
Amortization of actuarial net (losses) gains	(125)	(3)	644
Total	10,387	5,349	(12,631)
Other comprehensive (loss) income, net	(8,878)	17,546	(146,070)
Total comprehensive income	$ 371,393	$ 516,057	$ 422,781