LOSS AND LOSS ADJUSTMENT EXPENSE RESERVES (Activity in Liability for Loss and LAE Reserves) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
LOSS AND LOSS ADJUSTMENT EXPENSE RESERVES [Abstract]
Gross reserves, beginning of period	$ 97,340	$ 78,330	$ 61,016
Less: reinsurance recoverable	(7,496)	(10,394)	(2,313)
Net reserves, beginning of period	89,844	67,936	58,703
Incurred loss, net of reinsurance, related to:
Current year	174,795	113,819	79,932
Prior years	12,546	(9,466)	1,104
Total incurred loss and LAE, net of reinsurance	187,341	104,353	81,036
Paid loss, net of reinsurance, related to:
Current year	113,196	49,531	40,680
Prior years	56,958	32,914	31,123
Total paid loss and LAE, net of reinsurance	160,154	82,445	71,803
Net reserves, end of period	117,031	89,844	67,936
Plus: reinsurance recoverable	41,079	7,496	10,394
Gross reserves, end of period	$ 158,110	$ 97,340	$ 78,330