Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Consolidated Statements of Comprehensive Loss
Net income (loss)	$ 38,890	$ 54,543	$ (43,993)
Other comprehensive income (loss), net of taxes:
Change in unrealized holding gains (losses) on securities, net of deferred tax expense (benefit) of $16,277 in 2019, $(10,842) in 2018 and $1,442 in 2017	61,643	(42,740)	(1,357)
Foreign currency translation adjustment			6,881
Less reclassification adjustment for gains (losses) included in net income (loss) net of tax expense (benefit) of $162 in 2019, $(429) in 2018 and $1,471 in 2017	1,875	(1,128)	17,292
Other comprehensive income (loss)	59,768	(41,612)	(11,768)
Comprehensive income (loss)	$ 98,658	$ 12,931	$ (55,761)