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Goodwill and Other Intangibles - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]        
Amortization of Intangible Assets $ 0.4 $ 0.4 $ 1.2 $ 1.1
2013 0.4   0.4  
2014 1.3   1.3  
2015 1.1   1.1  
2016 0.9   0.9  
2017 $ 0.9   $ 0.9  
Patents [Member]
        
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]        
Remaining amortization period     1 year 10 months 24 days  
Land Use Rights [Member]
        
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]        
Remaining amortization period     62 years 10 months 24 days  
Trademark [Member]
        
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]        
Remaining amortization period     12 years 6 months  
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     14 years 3 months 18 days