CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Income and Comprehensive Income
Net Income	$ 167,925	$ 91,324
Reclassification to retained earnings due to cumulative effect of accounting change	(50)	(605)
Other comprehensive income (loss) before tax:
Foreing currency translation adjustment	(1,238)	93
Amortization of net losses of pension and postretirement benefit plans	5,876	5,386
Amortization of prior service credit of pension and postretirement benefit plans	0	(867)
Unrealized holding gains (losses) on debt securities arising during the period	109,863	(121,189)
Unrealized net (losses) gains on cash flow hedges	(682)	1,225
Reclassification adjustment for net losses (gains) included in net income	1,030	(1,267)
Other comprehensive income (loss) before tax	114,799	(117,224)
Income tax (expense) benefit	(10,804)	5,038
Total other comprehensive income (loss), net of tax	103,995	(112,186)
Comprehensive income (loss), net of tax	$ 271,920	$ (20,862)