CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Comprehensive income (loss)
Net income	$ 32,166	$ 20,155
Other comprehensive income (loss), net of tax:
Change in net unrealized investment gains (losses) on securities	113,898	(107,096)
Change in net funded status of benefit plans	0	0
Cumulative effect of change in accounting principle	0	(15,041)
Other comprehensive income (loss)	113,898	(122,137)
Total	$ 146,064	$ (101,982)