CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Income and Comprehensive Income
Net income	$ 155,323	$ 136,609	$ 436,395	$ 446,748
Other comprehensive income (loss) before tax:
Foreign currency translation adjustment	615	(976)	(3,240)	(220)
Amortization of prior service credit of pension and postretirement benefit plans	3,618	4,814	10,854	14,440
Unrealized holding gains (losses) on debt securities arising during the period	380,927	(234,827)	330,319	(99,360)
Amortization of unrealized losses of debt securities transfer from available-for-sale to held-to-maturity	45,331	43,783	133,761	128,726
Unrealized net gains (losses) on cash flow hedges	0	0	0	(30)
Reclassification adjustment for net gains (losses) included in net income	0	0	0	(41)
Other comprehensive income (loss) before tax	430,491	(187,206)	471,694	43,515
Income tax expense	(65,203)	(18,301)	(89,157)	(52,529)
Total other comprehensive income (loss), net of tax	365,288	(205,507)	382,537	(9,014)
Comprehensive income (loss), net of tax	$ 520,611	$ (68,898)	$ 818,932	$ 437,734