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Investments - Additional Information (Detail) (USD $)
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Schedule of Equity Method Investments [Line Items]      
Equity in earnings (losses), net of taxes $ (208,000) $ 246,000  
GS Internacional S/A
      
Schedule of Equity Method Investments [Line Items]      
Percentage of ownership in equity method investment 40.00%    
Equity in earnings (losses), net of taxes (213,000) (23,000)  
Grupo Vasconia S.A.B.
      
Schedule of Equity Method Investments [Line Items]      
Percentage of ownership in equity method investment 30.00%    
Exchange rate at period end - MXN to USD 13.06 12.34  
Average daily exchange rate for period - MXN to USD 13.23 12.70  
Increase in equity method investment (11,000) 1,700,000  
Due from related party 36,000    
Due to related party 8,000   152,000
Equity in earnings (losses), net of taxes 41,000.0 300,000  
Fair value of investment 35,200,000   35,200,000
Carrying value of investment $ 30,500,000   $ 30,500,000