CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Comprehensive income (loss)
Net income	$ 133,315	$ 184,443	$ 18,343
Other comprehensive income (loss), net of tax:
Change in net unrealized investment gains (losses) on fixed maturity securities	135,837	133,507	(188,195)
Change in net funded status of benefit plans	(398)	1,418	1,032
Cumulative effect of change in accounting principle	0	0	(15,041)
Other comprehensive income (loss)	135,439	134,925	(202,204)
Total	$ 268,754	$ 319,368	$ (183,861)