CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 163,355	$ 97,856	$ 402,580	$ 264,560
Unrealized gains and losses on available for sale securities
Net gains arising during the period	21,206	48,023	56,914	32,218
Amounts reclassified to earnings	(1)	1	(1)	9
Total	21,205	48,024	56,913	32,227
Unrealized losses on derivatives (cash flow hedges)
Amounts reclassified to earnings	(222)	(219)	(661)	(651)
Total	(222)	(219)	(661)	(651)
Defined benefit pension and postretirement benefit plans
Amortization of actuarial net loss	104	36	280	108
Other comprehensive income (loss), net	21,087	47,841	56,532	31,684
Total comprehensive income	$ 184,442	$ 145,697	$ 459,112	$ 296,244