PROPERTY, PLANT AND EQUIPMENT (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	$ 114,907,000	$ 99,551,000
Accumulated depreciation	(74,011,000)	(64,549,000)
Property, plant and equipment, net	40,896,000	35,002,000
Depreciation expense	10,500,000	8,400,000	8,000,000
Land [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	3,229,000	3,234,000
Buildings and Improvements [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	25,216,000	23,579,000
Machinery and Equipment [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	82,420,000	70,384,000
Construction in Progress [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	4,042,000	2,340,000
Assets Held for Sale [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	$ 0	$ 14,000