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Balance Sheet Information (Details 3) (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Property, Plant and Equipment      
Gross property, plant, and equipment at cost $ 155,390,000 $ 113,454,000  
Less accumulated depreciation and amortization 69,323,000 71,134,000  
Net property, plant, and equipment at cost 86,067,000 42,320,000  
Depreciation expense 8,200,000 7,100,000 8,300,000
Goodwill      
Balance at the beginning of the period 52,003,000 52,003,000  
Write-off (10,836,000)    
Acquisition 14,661,000    
Balance at the end of the period 55,828,000 52,003,000 52,003,000
Indefinite-lived intangible assets      
Indefinite-lived trademarks and tradenames 2,900,000 2,900,000  
Land
      
Property, Plant and Equipment      
Gross property, plant, and equipment at cost 12,535,000 7,274,000  
Buildings and improvements
      
Property, Plant and Equipment      
Gross property, plant, and equipment at cost 34,589,000 30,731,000  
Estimated useful lives, minimum (in years) 10    
Estimated useful lives, maximum (in years) 40    
Machinery and equipment
      
Property, Plant and Equipment      
Gross property, plant, and equipment at cost 102,241,000 73,173,000  
Estimated useful lives, minimum (in years) 3    
Estimated useful lives, maximum (in years) 10    
Leaseholds improvements
      
Property, Plant and Equipment      
Gross property, plant, and equipment at cost $ 6,025,000 $ 2,276,000  
Estimated useful lives, minimum (in years) 3    
Estimated useful lives, maximum (in years) 7