CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 133,167	$ 70,424	$ 239,225	$ 166,704
Unrealized gains and losses on available for sale securities
Net gains (losses) arising during the period	8,496	(5,600)	35,708	(15,805)
Amounts reclassified to earnings	0	8	0	8
Total	8,496	(5,592)	35,708	(15,797)
Unrealized losses on derivatives (cash flow hedges)
Amounts reclassified to earnings	(221)	(210)	(439)	(432)
Total	(221)	(210)	(439)	(432)
Defined benefit pension and postretirement benefit plans
Amortization of actuarial net loss	88	37	176	72
Other comprehensive income (loss), net	8,363	(5,765)	35,445	(16,157)
Total comprehensive income	$ 141,530	$ 64,659	$ 274,670	$ 150,547