PROPERTY, PLANT AND EQUIPMENT, NET (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	$ 149,104	$ 153,456
Accumulated depreciation	(100,349)	(95,845)
Property, plant and equipment, net	48,755	57,611
Depreciation expense	14,800	16,000	$ 15,000
Land [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	2,234	2,240
Buildings and Improvements [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	30,061	29,346
Machinery and Equipment [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	113,780	116,921
Construction in Progress [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	$ 3,029	$ 4,949