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Property, Plant and Equipment (Schedule of Property, Plant and Equipment) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Total cost $ 111,235 $ 94,406
Less: Accumulated depreciation and amortization (65,918) (56,153)
Total property, plant and equipment, net 45,317 38,253
Land [Member]    
Property, Plant and Equipment [Line Items]    
Total cost   140
Buildings and Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total cost 229 670
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total cost 14,988 14,945
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total cost 86,542 69,442
Software [Member]    
Property, Plant and Equipment [Line Items]    
Total cost 9,011 8,979
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Total cost $ 465 $ 230