Segment Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) Segment	Sep. 30, 2019 USD ($)
Segment Information [Abstract]
Number of reportable segments | Segment			1
Summary of Segment Revenue [Abstract]
Net premiums earned	$ 117,853	$ 110,288	$ 325,242	$ 335,931
Net investment income	5,486	6,703	19,102	19,434
Net realized and unrealized gains (losses) on investments	144	125	(16,996)	9,041
Commissions and other income	1,469	2,716	5,020	6,761
Total revenues	124,952	119,832	332,368	371,167
Property and Casualty Insurance [Member]
Summary of Segment Revenue [Abstract]
Net premiums earned	117,853	110,288	325,242	335,931
Net investment income	5,486	6,703	19,102	19,434
Net realized and unrealized gains (losses) on investments	144	125	(16,996)	9,041
Commissions and other income	1,469	2,716	5,020	6,761
Total revenues	$ 124,952	$ 119,832	$ 332,368	$ 371,167