ASBESTOS AND ENVIRONMENTAL CLAIMS (Details) $ in Thousands	12 Months Ended	84 Months Ended
	Dec. 31, 2015 USD ($) policyholder lawsuit claim	Dec. 31, 2015 USD ($) lawsuit claim	Dec. 31, 2014 USD ($)
Liability for Asbestos and Environmental Claims [Abstract]
Average asbestos and environmental losses paid by company per year over past five years	$ 1,800
Reserves for asbestos and environmental related claims, before reinsurance	11,500	$ 11,500	$ 9,400
Reserves for asbestos and environmental related claims, net of reinsurance	$ 11,200	$ 11,200	$ 9,300
Number of asbestos bodily injury lawsuits | lawsuit	1,809	1,809
Number of policyholders producing recent higher paid asbestos amounts | policyholder	1
Company's share of asbestos related claims settled		$ 9,400
Number of asbestos exposure claims associated with furnace manufacturer, a former policyholder, remain open | claim	655	655
Asbestos reserve strengthening	$ 4,100