RESTRUCTURING CHARGES (Cost Incurred and Expected to be Incurred) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Restructuring Cost and Reserve [Line Items]
Total Costs Expected to be Incurred	$ 7,538
Cost Recognized	1,352	$ 1,436
Cost Recognized (Cumulative costs recognized to date)	5,858
Employee termination costs
Restructuring Cost and Reserve [Line Items]
Total Costs Expected to be Incurred	2,897
Cost Recognized	404
Cost Recognized (Cumulative costs recognized to date)	2,674
Inventory Impairment
Restructuring Cost and Reserve [Line Items]
Total Costs Expected to be Incurred	1,401
Cost Recognized	0
Cost Recognized (Cumulative costs recognized to date)	1,401
Consulting fees
Restructuring Cost and Reserve [Line Items]
Total Costs Expected to be Incurred	1,715
Cost Recognized	902
Cost Recognized (Cumulative costs recognized to date)	1,217
Facility related costs
Restructuring Cost and Reserve [Line Items]
Total Costs Expected to be Incurred	862
Cost Recognized	11
Cost Recognized (Cumulative costs recognized to date)	206
Other related costs
Restructuring Cost and Reserve [Line Items]
Total Costs Expected to be Incurred	663
Cost Recognized	35
Cost Recognized (Cumulative costs recognized to date)	$ 360