Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net loss	$ (10,296)	$ (8,072)	$ (12,514)	$ (9,312)
Unrealized gains (losses) on fixed maturities and equity investments: [Abstract]
Unrealized losses arising during the period	(72)	(1,064)	(437)	(1,227)
Reclassification adjustment for amounts included in net loss	(4)	478	(11)	(29)
Change in fair value of debt attributable to instrument-specific credit risk	778	0	344	0
Other comprehensive income (loss)	702	(586)	(104)	(1,256)
Comprehensive loss	(9,594)	(8,658)	(12,618)	(10,568)
Less: comprehensive income (loss) attributable to noncontrolling interests in consolidated subsidiaries	158	(339)	511	(138)
Comprehensive loss attributable to common shareholders	$ (9,752)	$ (8,319)	$ (13,129)	$ (10,430)