Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Net income	$ 172,059	$ 157,003	$ 343,046	$ 307,925
Other comprehensive income (loss), before tax:
Change in net unrealized gain/loss on securities available for sale during the period	90,742	(14,563)	(11,441)	141,069
Change in net unrealized gain on securities transferred to held to maturity	0	0	0	(521)
Reclassification adjustment for net (gains) losses included in net income	0	0	0	14
Total securities available for sale and transferred securities, before tax amount	90,742	(14,563)	(11,441)	140,562
Defined-benefit post-retirement benefit plans:
Reclassification adjustment for net amortization of actuarial gain/loss included in net income as a component of net periodic cost (benefit)	209	309	418	619
Total defined-benefit post-retirement benefit plans	209	309	418	619
Other comprehensive income (loss), before tax	90,951	(14,254)	(11,023)	141,181
Deferred tax expense (benefit)	19,100	(2,993)	(2,314)	29,649
Other comprehensive income (loss), net of tax	71,851	(11,261)	(8,709)	111,532
Comprehensive income	$ 243,910	$ 145,742	$ 334,337	$ 419,457