CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Income and Comprehensive Income
Net income	$ 34,302	$ 167,925
Reclassification to retained earnings due to cumulative effect of accounting change	0	(50)
Other comprehensive income before tax:
Foreing currency translation adjustment	(1,818)	(1,238)
Amortization of net losses of pension and postretirement benefit plans	5,362	5,876
Unrealized holding gains on debt securities arising during the period	447,117	109,863
Unrealized net losses on cash flow hedges	(4,702)	(682)
Reclassification adjustment for net losses included in net income	1,327	1,030
Other comprehensive income before tax	447,286	114,799
Income tax expenses	(66,725)	(10,804)
Total other comprehensive income, net of tax	380,561	103,995
Comprehensive income, net of tax	$ 414,863	$ 271,920