CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Income and Comprehensive Income
Net income	$ 165,319	$ 140,648	$ 504,350	$ 511,755
Reclassification to retained earnings due to cumulative effect of accounting change	0	0	(50)	(605)
Other comprehensive income (loss) before tax:
Foreing currency translation adjustment	155	(605)	(2,287)	(3,968)
Amortization of net losses of pension and postretirement benefit plans	5,877	5,386	17,629	16,157
Amortization of prior service credit of pension and postretirement benefit plans	0	(868)	0	(2,603)
Unrealized holding gains (losses) on debt securities arising during the period	53,553	(43,781)	306,857	(201,193)
Reclassification adjustment for (gains) losses included in net income (loss)	(20)	0	(20)	0
Unrealized net (losses) gains on cash flow hedges	(3,538)	341	(5,358)	1,296
Reclassification adjustment for net losses (gains) included in net income	1,221	147	3,142	(870)
Other comprehensive income (loss) before tax	57,288	(39,380)	319,953	(191,786)
Income tax (expense) benefit	(4,955)	1,983	(30,859)	8,249
Total other comprehensive income (loss), net of tax	52,333	(37,397)	289,094	(183,537)
Comprehensive income (loss), net of tax	$ 217,652	$ 103,251	$ 793,444	$ 328,218