LOSS AND LOSS ADJUSTMENT EXPENSE RESERVES (Schedule of Cumulative Paid Losses and ALAE, Net of Reinsurance Recoverable) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Dec. 31, 2007
Claims Development [Line Items]
Cumulative paid, claims and allocated claim adjustment expenses, net of reinsurance	$ 414,308
Liability for Claims and Claims Adjustment Expense	158,110	$ 97,340	$ 78,330	$ 61,016
Accident Year 2007 [Member]
Claims Development [Line Items]
Cumulative paid, claims and allocated claim adjustment expenses, net of reinsurance	17,519	17,509	17,443	17,429	$ 17,291	$ 17,027	$ 16,783	$ 16,160	$ 15,352	$ 11,358
Accident Year 2008 [Member]
Claims Development [Line Items]
Cumulative paid, claims and allocated claim adjustment expenses, net of reinsurance	15,587	15,583	15,595	15,445	15,308	15,190	14,689	13,832	$ 9,477
Accident Year 2009 [Member]
Claims Development [Line Items]
Cumulative paid, claims and allocated claim adjustment expenses, net of reinsurance	26,982	26,927	26,831	26,462	26,007	24,657	23,095	$ 15,047
Accident Year 2010 [Member]
Claims Development [Line Items]
Cumulative paid, claims and allocated claim adjustment expenses, net of reinsurance	29,739	29,092	27,984	26,886	24,730	21,350	$ 14,052
Accident Year 2011 [Member]
Claims Development [Line Items]
Cumulative paid, claims and allocated claim adjustment expenses, net of reinsurance	25,580	24,047	22,723	21,323	19,250	$ 11,119
Accident Year 2012 [Member]
Claims Development [Line Items]
Cumulative paid, claims and allocated claim adjustment expenses, net of reinsurance	25,186	23,923	23,120	20,728	$ 13,693
Accident Year 2013 [Member]
Claims Development [Line Items]
Cumulative paid, claims and allocated claim adjustment expenses, net of reinsurance	35,123	33,867	31,606	$ 19,986
Accident Year 2014 [Member]
Claims Development [Line Items]
Cumulative paid, claims and allocated claim adjustment expenses, net of reinsurance	57,891	53,831	$ 37,033
Accident Year 2015 [Member]
Claims Development [Line Items]
Cumulative paid, claims and allocated claim adjustment expenses, net of reinsurance	76,169	$ 52,190
Accident Year 2016 [Member]
Claims Development [Line Items]
Cumulative paid, claims and allocated claim adjustment expenses, net of reinsurance	101,532
All Outstanding Liabilities for Unpaid Claims and LAE Prior to 2007 [Member]
Claims Development [Line Items]
Liability for Claims and Claims Adjustment Expense	1,478
Homeowners [Member]
Claims Development [Line Items]
Liability for Claims and Claims Adjustment Expense	$ 87,955