Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 5,552	$ 1,505	$ 916	$ (3,220)
Unrealized investment gains (losses):
Unrealized investment gains (losses) during the period	394	5,017	(1,530)	3,702
Income tax (benefit) expense	0	0	0	0
Unrealized investment gains (losses), net of tax	394	5,017	(1,530)	3,702
Less: reclassification adjustments to:
Net realized investment gains (losses) included in net income (loss)	(902)	2	41	386
Income tax (benefit) expense	0	0	0	0
Total reclassifications included in net income (loss), net of tax	(902)	2	41	386
Other comprehensive income (loss)	1,296	5,015	(1,571)	3,316
Total comprehensive income (loss)	$ 6,848	$ 6,520	$ (655)	$ 96