Segment Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) Segment	Mar. 31, 2019 USD ($)
Segment Information [Abstract]
Number of reportable segments | Segment	1
Summary of Segment Revenue [Abstract]
Net premiums earned	$ 109,659	$ 110,013
Net investment income	7,236	6,232
Net realized and unrealized gains (losses) on investments	(27,756)	6,028
Commissions and other income	1,663	2,064
Total revenues	90,802	124,337
Property and Casualty Insurance [Member]
Summary of Segment Revenue [Abstract]
Net premiums earned	109,659	110,013
Net investment income	7,236	6,232
Net realized and unrealized gains (losses) on investments	(27,756)	6,028
Commissions and other income	1,663	2,064
Total revenues	$ 90,802	$ 124,337