RESTRUCTURING - Roll Forward of Restructuring Reserve (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Restructuring Reserve [Roll Forward]
Balance			$ 734
Expense			1,128
Payments			(557)
Currency and Other Adjustments			8
Balance	$ 1,313		1,313
Restructuring expenses	373	$ 285	1,202	$ 3,397
Severance
Restructuring Reserve [Roll Forward]
Balance			452
Expense			684
Payments			(374)
Currency and Other Adjustments			3
Balance	765		765
Restructuring expenses	(41)	94	758	1,896
Contract termination costs
Restructuring Reserve [Roll Forward]
Balance			282
Expense			386
Payments			(169)
Currency and Other Adjustments			5
Balance	504		504
Restructuring expenses	370	97	386	381
Equipment moving costs
Restructuring Reserve [Roll Forward]
Balance			0
Expense			15
Payments			(14)
Currency and Other Adjustments			0
Balance	1		1
Restructuring expenses	1	27	15	774
Other exit costs
Restructuring Reserve [Roll Forward]
Balance			0
Expense			43
Payments			0
Currency and Other Adjustments			0
Balance	43		43
Restructuring expenses	$ 43	$ 67	43	141
Corporate, Non-Segment
Restructuring Reserve [Roll Forward]
Restructuring expenses			74	1,560
Corporate, Non-Segment | Severance
Restructuring Reserve [Roll Forward]
Restructuring expenses			74	1,560
Corporate, Non-Segment | Contract termination costs
Restructuring Reserve [Roll Forward]
Restructuring expenses			0	0
Corporate, Non-Segment | Equipment moving costs
Restructuring Reserve [Roll Forward]
Restructuring expenses			0	0
Corporate, Non-Segment | Other exit costs
Restructuring Reserve [Roll Forward]
Restructuring expenses			$ 0	$ 0