SURPLUS NOTES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
SURPLUS NOTES [Abstract]
Surplus notes payable to affiliate	$ 25,000	$ 25,000
Interest rate on surplus notes (in hundredths)	1.35%	1.35%	1.35%
Approved interest rate not yet effective on surplus notes (in hundredths)	2.73%
Period for review of interest rate	5 years	5 years	5 years
Interest expense (all affiliated)	$ 337	$ 337	$ 337