Reinsurance - Effects of Reinsurance and Assumption Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Written premiums:
Direct	$ 14,954	$ 17,568	$ 33,417	$ 36,423
Assumed	10,215	8,994	15,968	13,876
Ceded	(3,735)	(3,967)	(7,629)	(7,860)
Net written premiums	21,434	22,595	41,756	42,439
Earned premiums:
Direct	17,254	20,561	35,258	41,785
Assumed	7,828	7,295	15,374	13,796
Ceded	(3,733)	(3,918)	(7,596)	(7,842)
Net earned premiums	21,349	23,938	43,036	47,739
Losses and LAE:
Direct	17,434	14,432	34,232	27,390
Assumed	5,741	3,414	10,255	6,969
Ceded	(8,793)	(2,779)	(15,649)	(5,963)
Total net incurred losses and LAE	$ 14,382	$ 15,067	$ 28,838	$ 28,396