CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Income and Comprehensive Income
Net income	$ 1,102,641	$ 934,889	$ 506,622
Other comprehensive (loss) income before tax:
Foreign currency translation adjustment	10,572	3,947	(14,471)
Adjustment of pension and postretirement benefit plans	7,811	36,950	(9,032)
Amortization of net losses	15,644	20,749	21,447
Unrealized net holding (losses) gains on debt securities arising during the period	(2,539,421)	(619,470)	419,993
Reclassification adjustment for gains included in net income	0	(23)	(41)
Amortization of unrealized losses of debt securities transfer from available-for-sale to held-to-maturity	41,642	0	0
Unrealized net gains (losses) on cash flow hedges	3,719	539	(8,872)
Reclassification adjustment for net (gains) losses included in net income	(960)	1,847	6,379
Other comprehensive (loss) income before tax	(2,460,993)	(555,461)	415,403
Income tax benefit (expense)	(261,134)	(40,401)	55,474
Total other comprehensive (loss) income, net of tax	(2,199,859)	(515,060)	359,929
Comprehensive (loss) income, net of tax	$ (1,097,218)	$ 419,829	$ 866,551