SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Investment in Unconsolidated Investees (Details) $ in Thousands			12 Months Ended
	Mar. 04, 2015 USD ($)	Feb. 05, 2014 USD ($)	Dec. 31, 2015 USD ($) item	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
INVESTMENT IN UNCONSOLIDATED INVESTEES:
Investment amount			$ 70,784	$ 60,046
Investee earnings recorded in income			10,914	12,338	$ 10,915
Amount of investment			1,711	5,301
Reinsurance assumed			34,456	76,581	73,053
Net premiums earned			$ 700,161	687,375	630,802
Additional summarized financial information for investee
Dividends received				6,600	13,200
Maui Jim Inc.
INVESTMENT IN UNCONSOLIDATED INVESTEES:
Interest in investee (as a percent)			40.00%
Investment amount			$ 62,700	54,300
Investee earnings recorded in income			9,900	12,000	10,900
Total investee net income			$ 23,700	30,700	26,100
Equity ownership interest (as a percent)			40.00%
Additional summarized financial information for investee
Total assets			$ 223,400	219,800
Total liabilities			90,000	107,600
Total equity			133,400	112,200
Undistributed earnings included in retained earnings			52,000
Dividends received			$ 0	6,600	$ 13,200
Prime Holdings Insurance Services, Inc. (Prime)
INVESTMENT IN UNCONSOLIDATED INVESTEES:
Interest in investee (as a percent)	27.00%	20.00%	27.00%
Investment amount			$ 8,100	5,700
Investee earnings recorded in income			$ 1,000	$ 300
Amount of investment	$ 1,700	$ 5,300
Number of insurance carriers Company writes through | item			2
Equity ownership interest (as a percent)	27.00%	20.00%	27.00%
Percentage of quota share reinsurance treaty, effective January 1, 2014				25.00%
Reinsurance assumed			$ 11,300	$ 10,200
Net premiums earned			$ 10,900	$ 5,300