Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 486,073	$ 460,815	$ 392,602
Other comprehensive income before income taxes:
Net change in unrealized gain (loss) on securities available for sale and cash flow hedges	243,977	(65,141)	91,061
Reclassification of net loss realized and included in earnings	35,033	52,832	115,619
Valuation adjustments to employee benefit plans	17,231	28,191	(13,325)
Amortization of unrealized net loss on securities transferred to held to maturity	1,580	1,670	1,747
Other comprehensive income before income taxes	297,821	17,552	195,102
Income tax expense	67,980	2,517	44,047
Other comprehensive income net of income taxes	229,841	15,035	151,055
Comprehensive income	$ 715,914	$ 475,850	$ 543,657