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Property, Plant and Equipment Schedule of property, plant and equipment (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 108,853 $ 126,391  
Accumulated depreciation and amortization, (41,698) (73,689)  
Property, plant and equipment, less accumulated depreciation and amortization 67,155 52,702 44,442
Land
      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 5,952 8,750  
Buildings and improvements
      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 31,087 49,917  
Machinery and equipment
      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 25,813 28,767  
Capitalized software
      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 16,798 21,422  
McCook facility
      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 12,961 0  
Accumulated depreciation and amortization, (700)    
Furniture and fixtures
      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 6,931 5,640  
Capital leases
      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 1,694 3,501  
Accumulated depreciation and amortization, (1,500)    
Vehicles
      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 131 131  
Construction in progress
      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 7,486 $ 8,263