Property Plant and Equipment (Schedule of Property Plant and Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 178,044	$ 171,667
Less: Accumulated depreciation	(107,094)	(100,497)
Property, plant and equipment, net	70,950	71,170
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment	9,478	9,181
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 73,828	72,514
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Useful Lives	5 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Useful Lives	20 years
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 70,791	66,799
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful Lives	3 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful Lives	10 years
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 7,128	6,254
Office furniture and equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful Lives	3 years
Office furniture and equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful Lives	7 years
Computer software
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 11,298	11,283
Computer software | Minimum
Property, Plant and Equipment [Line Items]
Useful Lives	3 years
Computer software | Maximum
Property, Plant and Equipment [Line Items]
Useful Lives	7 years
Transportation equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 5,521	$ 5,636
Useful Lives	3 years