SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property, Plant, and Equipment (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 83,543	$ 80,967
Less accumulated depreciation	(52,709)	(48,779)
Property, plant and equipment, net	30,834	32,188
Land and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	5,031	4,887
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	32,759	33,498
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	29,664	26,959
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	8,556	8,242
Software costs
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 7,533	$ 7,381