CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Income and Comprehensive Income
Net income	$ 218,079	$ 127,628	$ 480,711	$ 161,930
Other comprehensive income (loss) before tax:
Foreing currency translation adjustment	2,726	(10,857)	3,295	(12,675)
Amortization of net losses of pension and postretirement benefit plans	5,189	5,362	10,379	10,724
Unrealized holding gains (losses) on debt securities arising during the period	76,913	13,650	(320,414)	460,767
Unrealized net (losses) gains on cash flow hedges	(602)	(580)	1,621	(5,282)
Reclassification adjustment for net losses included in net income	280	2,187	189	3,514
Other comprehensive income (loss) before tax	84,506	9,762	(304,930)	457,048
Income tax (expense) benefit	(5,459)	(1,036)	19,248	(67,761)
Total other comprehensive income (loss), net of tax	79,047	8,726	(285,682)	389,287
Comprehensive income, net of tax	$ 297,126	$ 136,354	$ 195,029	$ 551,217