Loss and Loss Adjustment Expense Reserves (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Insurance Loss Reserves [Abstract]
Balance, beginning of period, gross of reinsurance	$ 7,813	$ 5,957	$ 6,971	$ 2,123
Less reinsurance recoverable on loss and LAE expense reserves	(4,469)	(2,028)	(3,652)	(120)
Balance, beginning of period, net of reinsurance	3,344	3,929	3,319	2,003
Incurred related to:
Current year	3,276	1,800	7,236	8,603
Prior years	(893)	38	(1,222)	(129)
Paid related to:
Current year	(2,129)	(2,604)	(4,814)	(7,048)
Prior years	(27)	(710)	(948)	(976)
Balance, June 30, net of reinsurance	3,571	2,453	3,571	2,453
Plus reinsurance recoverable related to loss and LAE expense reserves	6,012	3,431	6,012	3,431
Balance, June 30, gross of reinsurance	$ 9,583	$ 5,884	$ 9,583	$ 5,884