PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property, plant and equipment, total cost	$ 347,711		$ 372,194
Less: accumulated depreciation	(239,189)		(257,859)
Total net book value	108,522	[1]	114,335	[1]	$ 142,907
Assets held under capital leases (included in the above)
Assets held under capital leases (included in the above)	8,451		7,568
Less: accumulated depreciation	(3,556)		(2,760)
Total net book value	4,895		4,808
Depreciation of property, plant and equipment	27,943		32,836		$ 37,175
Land and buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, total cost	92,237		103,248
Assets held under capital leases (included in the above)
Assets held under capital leases (included in the above)	3,805		4,243
Machinery, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, total cost	164,503		172,929
Assets held under capital leases (included in the above)
Assets held under capital leases (included in the above)	4,646		3,325
Other equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, total cost	32,314		36,516
Software licenses [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, total cost	55,656		56,176
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, total cost	$ 3,001		$ 3,325

[1] Reflects property, plant and equipment.