FAIR VALUE ACCOUNTING (Details) - Recurring - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Assets:
Investments	$ 2,312	$ 7,971
Assets	2,312	7,971
Level 1
Assets:
Investments	2,312	6,404
Assets	$ 2,312	6,404
Level 2
Assets:
Investments		1,567
Assets		$ 1,567