VARIABLE INTEREST ENTITY (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Investments [Abstract]
Debt maturities, held-to-maturity, at amortized cost	$ 6,619	$ 7,417
Equity securities, available-for-sale, at fair value	38,534	39,247
Total investments	384,331	330,763
Cash and cash equivalents	53,038	40,157	$ 41,446	$ 21,143
Prepaid reinsurance premiums	120,771	54,502
Premiums receivable, net	38,594	27,275
Deferred acquisition costs	15,547	13,610
Other assets	7,718	21,231
Total assets	638,298	503,631
LIABILITIES [Abstract]
Loss and loss adjustment expense reserves	97,340	78,330	$ 61,016	$ 49,908
Unearned premiums	253,960	192,424
Debt	5,000	0
Other liabilities	25,612	38,957
Total liabilities	387,539	$ 311,052
Variable Interest Entity (VIE) [Member]
Investments [Abstract]
Debt maturities, held-to-maturity, at amortized cost	21,312
Equity securities, available-for-sale, at fair value	1,358
Total investments	22,670
Cash and cash equivalents	14,616
Prepaid reinsurance premiums	34
Premiums receivable, net	355
Deferred income taxes, net	646
Deferred acquisition costs	234
Other assets	270
Total assets	38,825
LIABILITIES [Abstract]
Loss and loss adjustment expense reserves	237
Unearned premiums	1,448
Debt	5,000
Income taxes payable	8
Other liabilities	374
Total liabilities	$ 7,067