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Goodwill and Other Intangibles (Details Textual) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Acquired Finite and Indefinite Lived Intangible Assets [Line Items]      
Remaining amortization period 25 years    
Goodwill and Other Intangibles (Textual) [Abstract]      
Amortization of Intangible Assets $ 1,500,000 $ 1,200,000 $ 1,400,000
2013 1,500,000    
2014 1,400,000    
2015 1,100,000    
2016 1,000,000    
2017 1,000,000    
Total purchase price of acquired business 8,900,000    
Increase in Goodwill related to foreign Currency translation 374,000 (147,000)  
Increase in goodwill related to acquisitions $ 2,964,000    
Maximum [Member]
      
Acquired Finite and Indefinite Lived Intangible Assets [Line Items]      
Aggregate amortization expense for other intangibles with finite lives 20 years    
Maximum [Member] | Actual [Member]
      
Acquired Finite and Indefinite Lived Intangible Assets [Line Items]      
Aggregate amortization expense for other intangibles with finite lives 82 years    
Minimum [Member]
      
Acquired Finite and Indefinite Lived Intangible Assets [Line Items]      
Aggregate amortization expense for other intangibles with finite lives 1 year    
Minimum [Member] | Actual [Member]
      
Acquired Finite and Indefinite Lived Intangible Assets [Line Items]      
Aggregate amortization expense for other intangibles with finite lives 7 years    
Patents [Member]
      
Acquired Finite and Indefinite Lived Intangible Assets [Line Items]      
Remaining amortization period 2 years 6 months 0 days    
Land use rights [Member]
      
Acquired Finite and Indefinite Lived Intangible Assets [Line Items]      
Remaining amortization period 63 years 7 months 6 days    
Trademark [Member]
      
Acquired Finite and Indefinite Lived Intangible Assets [Line Items]      
Remaining amortization period 13 years 3 months 18 days    
Technology [Member]
      
Acquired Finite and Indefinite Lived Intangible Assets [Line Items]      
Remaining amortization period 18 years 1 month 6 days    
Customer relationships [Member]
      
Acquired Finite and Indefinite Lived Intangible Assets [Line Items]      
Remaining amortization period 15 years