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Goodwill and Other Intangibles - Additional Information (Detail) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]        
Amortization of Intangible Assets $ 400,000 $ 400,000 $ 800,000 $ 700,000
2014 800,000   800,000  
2015 1,300,000   1,300,000  
2016 1,200,000   1,200,000  
2017 1,200,000   1,200,000  
2018 1,100,000   1,100,000  
Goodwill and Intangible Asset Impairment     $ 0  
Patents [Member]
        
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]        
Remaining amortization period     2 years  
Land Use Rights [Member]
        
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]        
Remaining amortization period     62 years 8 months 12 days  
Trademark [Member]
        
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]        
Remaining amortization period     11 years 1 month 6 days  
Technology [Member]
        
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]        
Remaining amortization period     17 years 3 months 18 days  
Customer Relationships [Member]
        
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]        
Remaining amortization period     15 years 7 months 6 days