BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, plant and equipment
Property, plant and equipment, gross	$ 65,208	$ 57,180
Less accumulated depreciation	(27,734)	(21,865)
Property, plant and equipment, net	37,474	35,315
Depreciation expense	6,545	4,822	$ 4,553
Land
Property, plant and equipment
Property, plant and equipment, gross	962	970
Building and improvements
Property, plant and equipment
Property, plant and equipment, gross	$ 9,911	9,771
Building and improvements | Minimum
Property, plant and equipment
Useful lives	5 years
Building and improvements | Maximum
Property, plant and equipment
Useful lives	39 years
Machinery, equipment, tools and dies
Property, plant and equipment
Property, plant and equipment, gross	$ 44,247	37,782
Machinery, equipment, tools and dies | Minimum
Property, plant and equipment
Useful lives	3 years
Machinery, equipment, tools and dies | Maximum
Property, plant and equipment
Useful lives	15 years
Furniture, fixtures and other
Property, plant and equipment
Property, plant and equipment, gross	$ 10,088	$ 8,657
Furniture, fixtures and other | Minimum
Property, plant and equipment
Useful lives	3 years
Furniture, fixtures and other | Maximum
Property, plant and equipment
Useful lives	10 years