RESTRUCUTRING CHARGES (Restructuring Reserve) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Reserve [Roll Forward]
Balance at December 31, 2014	$ 0
Restructuring charges	4,506	$ 661	$ 3,558
Cash expenditures	(2,077)
Non cash item	(1,401)
Other adjustments to accrual	0
Foreign currency translation adjustment	18
Balance at September 30, 2015	1,046	$ 0
Employee termination costs
Restructuring Reserve [Roll Forward]
Restructuring charges	2,270
Inventory Impairment
Restructuring Reserve [Roll Forward]
Restructuring charges	1,401
Facility related costs
Restructuring Reserve [Roll Forward]
Restructuring charges	195
Consulting fees
Restructuring Reserve [Roll Forward]
Restructuring charges	315
Other related costs
Restructuring Reserve [Roll Forward]
Restructuring charges	$ 325