CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Income and Comprehensive Income
Net income	$ 211,421	$ 218,079	$ 423,107	$ 480,711
Other comprehensive (loss) income before tax:
Foreign currency translation adjustment	5,998	2,726	3,140	3,295
Adjustment of pension and postretirement benefit plans	0	0	2,030	0
Amortization of net losses of pension and postretirement benefit plans	3,911	5,189	7,822	10,379
Unrealized holding (losses) gains on debt securities arising during the period	(620,597)	76,913	(1,839,620)	(320,414)
Unrealized net (losses) gains on cash flow hedges	(377)	(602)	3,511	1,621
Reclassification adjustment for net (gains) losses included in net income	(880)	280	(1,579)	189
Other comprehensive (loss) income before tax	(611,945)	84,506	(1,824,696)	(304,930)
Income tax benefit (expense)	56,167	(5,459)	196,749	19,248
Total other comprehensive (loss) income, net of tax	(555,778)	79,047	(1,627,947)	(285,682)
Comprehensive (loss) income, net of tax	$ (344,357)	$ 297,126	$ (1,204,840)	$ 195,029