Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (18,898)	$ (1,475)	$ (21,763)	$ (4,016)
Unrealized investment gains (losses):
Unrealized investment gains (losses) during the period	377	(109)	1,281	1,629
Income tax (benefit) expense	117	(23)	398	564
Unrealized investment gains (losses), net of tax	260	(86)	883	1,065
Less: reclassification adjustments to:
Net realized investment gains (losses) included in net income (loss)	7	(43)	57	(301)
Income tax benefit	0	(17)	0	(104)
Total reclassifications included in net income (loss), net of tax	7	(26)	57	(197)
Other comprehensive income (loss)	253	(60)	826	1,262
Total comprehensive income (loss)	$ (18,645)	$ (1,535)	$ (20,937)	$ (2,754)