RESTRUCTURING ACTIVITIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Activity and liability balances related to restructuring costs [Roll Forward]
Liability, beginning balance	$ 588	$ 110
New charges	137	1,409
Cash payment and other settlements	(725)	(931)
Liability, ending balance	0	588
Other restructuring costs	200	700
Severance Costs [Member]
Activity and liability balances related to restructuring costs [Roll Forward]
Liability, beginning balance	588	110
New charges	86	1,407
Cash payment and other settlements	(674)	(929)
Liability, ending balance	0	588
Other Restructuring Costs [Member]
Activity and liability balances related to restructuring costs [Roll Forward]
Liability, beginning balance	0	0
New charges	51	2
Cash payment and other settlements	(51)	(2)
Liability, ending balance	$ 0	$ 0