Accumulated Other Comprehensive Income (Loss) - Components of AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
AOCI Attributable to Parent, Net of Tax
Balance at the beginning of period, gross	$ (29,760)	$ 22,265	$ 30,630
Unrealized holding gains (losses) on fixed income securities, gross	77,920	(53,582)	3,517
Cumulative translation adjustment, gross			6,881
Amounts reclassified into net loss (income), gross	2,037	(1,557)	18,763
Other comprehensive loss (income), gross	75,883	(52,025)	(8,365)
Balance at the end of period, gross	46,123	(29,760)	22,265
Balance at the beginning of period, tax	(7,445)	2,968	1,148
Unrealized holding gains (losses) on fixed income securities, tax	16,277	(10,842)	4,874
Amounts reclassified into net loss (income), tax	162	(429)	1,471
Other comprehensive loss (income), tax	16,115	(10,413)	3,403
Reclassification of stranded deferred taxes			(1,583)
Balance at the end of period, tax	8,670	(7,445)	2,968
Balance at the beginning of period, net	(22,315)	19,297	29,482
Unrealized holding gains (losses) on fixed income securities	61,643	(42,740)	(1,357)
Foreign currency translation adjustment			6,881
Amounts reclassified into net loss (income)	1,875	(1,128)	17,292
Other comprehensive income (loss)	59,768	(41,612)	(11,768)
Reclassification of stranded deferred taxes, net			1,583
Balance at the end of period, net	$ 37,453	$ (22,315)	$ 19,297