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Investments - Additional Information (Detail)
3 Months Ended 9 Months Ended
Sep. 30, 2015
USD ($)
MXN / $
Sep. 30, 2014
USD ($)
MXN / $
Sep. 30, 2015
USD ($)
MXN / $
Sep. 30, 2014
USD ($)
MXN / $
Dec. 31, 2014
USD ($)
MXN / $
Schedule of Equity Method Investments [Line Items]          
Equity in earnings (losses), net of taxes $ (459,000) $ (5,193,000) $ (169,000) $ (5,360,000)  
Grupo Vasconia S.A.B.          
Schedule of Equity Method Investments [Line Items]          
Percentage of ownership in equity method investment 30.00%   30.00%    
Exchange rate at period end - MXN to USD | MXN / $ 17.01   17.01   14.74
Increase (decrease) in equity method investment     $ (5,100,000) (1,300,000)  
Equity in earnings (losses), net of taxes $ (500,000) $ 300,000 (200,000) $ 600,000  
Equity in earnings (losses), deferred taxes 800,000   1,300,000    
Fair value of investment 31,500,000   31,500,000   $ 30,800,000
Carrying value of investment $ 24,000,000   $ 24,000,000   27,800,000
Grupo Vasconia S.A.B. | Prepaid expenses and other current assets          
Schedule of Equity Method Investments [Line Items]          
Due from related party         33,000
Grupo Vasconia S.A.B. | Transaction 02          
Schedule of Equity Method Investments [Line Items]          
Average daily exchange rate for period - MXN to USD | MXN / $ 16.41 13.11      
Grupo Vasconia S.A.B. | Transaction 02 | Minimum          
Schedule of Equity Method Investments [Line Items]          
Average daily exchange rate for period - MXN to USD | MXN / $     14.94 13.05  
Grupo Vasconia S.A.B. | Transaction 02 | Maximum          
Schedule of Equity Method Investments [Line Items]          
Average daily exchange rate for period - MXN to USD | MXN / $     16.41 13.11  
GS Internacional S/A          
Schedule of Equity Method Investments [Line Items]          
Percentage of ownership in equity method investment 40.00%   40.00%    
Equity in earnings (losses), net of taxes   $ 5,500,000   $ 5,900,000  
Carrying value of investment $ 0   $ 0   $ 0
Impairment on equity method investment, net of tax   $ 5,200,000   $ 5,200,000