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Property, Plant and Equipment Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Property, Plant and Equipment [Line Items]      
non-cash purchase of assets $ 300    
Property, plant and equipment, gross 83,364 $ 82,532  
Accumulated depreciation and amortization, (47,877) (40,944)  
Property, plant and equipment, less accumulated depreciation and amortization 35,487 41,588 $ 58,974
Land      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 2,692 2,701  
Buildings and improvements      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 18,343 18,503  
Machinery and equipment      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 22,558 22,418  
Capitalized software      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 19,710 18,758  
McCook facility      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 12,961 12,961  
Accumulated depreciation and amortization,   (4,600)  
Furniture and fixtures      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 5,693 5,703  
Capital leases      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 563 302  
Accumulated depreciation and amortization,   (300)  
Vehicles      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 163 168  
Construction in progress      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 681 $ 1,018