Reinsurance - Effects of Reinsurance and Assumption Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Written premiums:
Direct	$ 16,973	$ 16,814	$ 50,390	$ 53,237
Assumed	10,104	9,815	26,072	23,691
Ceded	(3,271)	(3,783)	(10,900)	(11,642)
Net written premiums	23,806	22,846	65,562	65,286
Earned premiums:
Direct	17,606	19,955	52,864	61,739
Assumed	8,356	7,363	23,730	21,160
Ceded	(3,187)	(3,868)	(10,783)	(11,711)
Net earned premiums	22,775	23,450	65,811	71,188
Losses and LAE:
Direct	13,232	19,324	47,464	46,714
Assumed	5,667	5,027	15,922	11,996
Ceded	(4,042)	(7,797)	(19,691)	(13,760)
Total net incurred losses and LAE	$ 14,857	$ 16,554	$ 43,695	$ 44,950