LOSS AND LOSS ADJUSTMENT EXPENSE (“LAE”) RESERVES (Activity in Liability for Loss and LAE Reserves) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
LOSS AND LOSS ADJUSTMENT EXPENSE (“LAE”) RESERVES [Abstract]
Gross reserves, beginning of period		$ 158,110	$ 97,340
Less: reinsurance recoverable	[1]	(41,079)	(7,496)
Net reserves, beginning of period		117,031	89,844
Incurred loss, net of reinsurance, related to:
Current year		50,674	30,093
Prior years		157	(548)
Total incurred loss and LAE, net of reinsurance		50,831	29,545
Paid loss, net of reinsurance, related to:
Current year		15,461	9,221
Prior years		33,945	19,710
Total paid loss and LAE, net of reinsurance		49,406	28,931
Net reserves, end of period		118,456	90,458
Plus: reinsurance recoverable	[1]	35,881	11,157
Gross reserves, end of period		$ 154,337	$ 101,615

[1] Reinsurance recoverable in this table includes only ceded loss and LAE reserves.