Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Net income	$ 180,209	$ 174,380	$ 523,255	$ 482,305
Other comprehensive income (loss), before tax:
Change in net unrealized gain/loss on securities available for sale during the period	(960,293)	273,173	(971,734)	414,242
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	7,512	0	7,512	14
Total securities available for sale and transferred securities, before tax amount	(952,781)	273,173	(964,222)	413,735
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)	207	310	625	929
Total defined-benefit post-retirement benefit plans	207	310	625	929
Other comprehensive income (loss), before tax	(952,574)	273,483	(963,597)	414,664
Deferred tax expense (benefit)	(200,041)	57,431	(202,355)	87,080
Other comprehensive income (loss), net of tax	(752,533)	216,052	(761,242)	327,584
Comprehensive income (loss)	$ (572,324)	$ 390,432	$ (237,987)	$ 809,889