CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Income and Comprehensive Income
Net income	$ 262,632	$ 34,302
Other comprehensive income (loss) before tax:
Foreing currency translation adjustment	569	(1,818)
Amortization of net losses of pension and postretirement benefit plans	5,190	5,362
Unrealized holding (losses) gains on debt securities arising during the period	(397,327)	447,117
Unrealized net gains (losses) on cash flow hedges	2,223	(4,702)
Reclassification adjustment for net (gains) losses included in net income	(91)	1,327
Other comprehensive (loss) income before tax	(389,436)	447,286
Income tax benefit (expense)	24,707	(66,725)
Total other comprehensive (loss) income, net of tax	(364,729)	380,561
Comprehensive (loss) income, net of tax	$ (102,097)	$ 414,863