SIGNIFICANT ACCOUNTING POLICIES - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment
Property, plant and equipment	$ 106,523	$ 109,733
Land [Member]
Property, Plant and Equipment
Property, plant and equipment	3,380	3,344
Buildings and improvements [Member]
Property, Plant and Equipment
Property, plant and equipment	$ 41,429	39,489
Buildings and improvements [Member] | Minimum [Member]
Property, Plant and Equipment
Estimated useful life	15 years
Buildings and improvements [Member] | Maximum [Member]
Property, Plant and Equipment
Estimated useful life	30 years
Manufacturing equipment and tooling [Member]
Property, Plant and Equipment
Property, plant and equipment	$ 38,599	40,433
Manufacturing equipment and tooling [Member] | Minimum [Member]
Property, Plant and Equipment
Estimated useful life	3 years
Manufacturing equipment and tooling [Member] | Maximum [Member]
Property, Plant and Equipment
Estimated useful life	15 years
Furniture, fixtures and computer equipment [Member]
Property, Plant and Equipment
Property, plant and equipment	$ 16,777	14,813
Furniture, fixtures and computer equipment [Member] | Minimum [Member]
Property, Plant and Equipment
Estimated useful life	3 years
Furniture, fixtures and computer equipment [Member] | Maximum [Member]
Property, Plant and Equipment
Estimated useful life	10 years
Other [Member]
Property, Plant and Equipment
Property, plant and equipment	$ 2,937	3,425
Other [Member] | Minimum [Member]
Property, Plant and Equipment
Estimated useful life	3 years
Other [Member] | Maximum [Member]
Property, Plant and Equipment
Estimated useful life	10 years
Construction in process [Member]
Property, Plant and Equipment
Property, plant and equipment	$ 3,401	$ 8,229