CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Income and Comprehensive Income
Net income	$ 248,114	$ 168,416	$ 728,825	$ 330,346
Other comprehensive income (loss) before tax:
Foreing currency translation adjustment	(1,265)	(2,035)	2,030	(14,710)
Amortization of net losses of pension and postretirement benefit plans	5,187	5,362	15,566	16,086
Unrealized holding (losses) gains on debt securities arising during the period	(55,220)	(10,633)	(375,634)	450,134
Reclassification adjustment for gains included in net income	(23)	(41)	(23)	(41)
Unrealized net (losses) gains on cash flow hedges	(721)	(1,478)	900	(6,760)
Reclassification adjustment for net losses included in net income	1,518	1,613	1,707	5,127
Other comprehensive (loss) income before tax	(50,524)	(7,212)	(355,454)	449,836
Income tax benefit (expense)	6,120	3,279	25,368	(64,482)
Total other comprehensive (loss) income, net of tax	(44,404)	(3,933)	(330,086)	385,354
Comprehensive income, net of tax	$ 203,710	$ 164,483	$ 398,739	$ 715,700