SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Deferred Policy Acquisition Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at beginning of year	$ 139,719	$ 150,092	$ 105,300
Underwriting costs deferred	203,982	173,865	156,367
Amortization of deferred policy acquisition costs	(186,817)	(167,449)	(153,677)
Ending unamortized deferred policy acquisition costs	156,884	156,508	107,990
Change in shadow deferred policy acquisition costs	11,380	(16,789)	42,102
Recorded asset at end of year	168,264	139,719	150,092
Property and Casualty Insurance [Member]
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at beginning of year	72,861	67,663	64,947
Underwriting costs deferred	197,869	166,508	149,891
Amortization of deferred policy acquisition costs	(180,183)	(161,310)	(147,175)
Recorded asset at end of year	90,547	72,861	67,663
Life Insurance [Member]
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at beginning of year	66,858	82,429	40,353
Underwriting costs deferred	6,113	7,357	6,476
Amortization of deferred policy acquisition costs	(6,634)	(6,139)	(6,502)
Ending unamortized deferred policy acquisition costs	66,337	83,647	40,327
Change in shadow deferred policy acquisition costs	11,380	(16,789)	42,102
Recorded asset at end of year	$ 77,717	$ 66,858	$ 82,429