FAIR VALUE ACCOUNTING (Details) - Recurring - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Assets:
Investments	$ 7,971	$ 8,543
Assets	7,971	8,543
Level 1
Assets:
Investments	6,404	6,749
Assets	6,404	6,749
Level 2
Assets:
Investments	1,567	1,794
Assets	$ 1,567	$ 1,794