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Goodwill and Other Intangibles - Additional Information (Detail) (USD $)
 0 Months Ended 3 Months Ended 9 Months Ended
Oct. 01, 2013
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]            
Amortization of Intangible Assets   $ 400,000 $ 400,000 $ 1,200,000 $ 1,200,000  
2014   400,000   400,000    
2015   1,300,000   1,300,000    
2016   1,200,000   1,200,000    
2017   1,100,000   1,100,000    
2018   1,100,000   1,100,000    
Goodwill impairment assessment percentage 41.00% 7.00%        
Goodwill and Intangible Asset Impairment   0        
Goodwill balance   18,359,000   18,359,000   13,873,000
AUSTRALIA
            
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]            
Goodwill balance   3,500,000   3,500,000    
Intangible assets balance   $ 3,600,000   $ 3,600,000    
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       61 years 10 months 24 days    
Trademark [Member]
            
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]            
Remaining amortization period       11 years    
Technology [Member]
            
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]            
Remaining amortization period       17 years 1 month 6 days    
Customer Relationships [Member]
            
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]            
Remaining amortization period       15 years 4 months 24 days