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Equity Investments - Additional Information (Detail) (USD $)
 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2011
Hong Kong
Dec. 31, 2012
CHINA
Feb. 29, 2012
CHINA
Dec. 31, 2012
Grupo Vasconia S.A.B.
Dec. 31, 2011
Grupo Vasconia S.A.B.
Dec. 31, 2010
Grupo Vasconia S.A.B.
Dec. 31, 2012
Grupo Vasconia S.A.B.
Transaction 01
Dec. 31, 2011
Grupo Vasconia S.A.B.
Transaction 01
Dec. 31, 2010
Grupo Vasconia S.A.B.
Transaction 01
Dec. 31, 2012
Grupo Vasconia S.A.B.
Transaction 02
Dec. 31, 2011
Grupo Vasconia S.A.B.
Transaction 02
Dec. 31, 2010
Grupo Vasconia S.A.B.
Transaction 02
Dec. 31, 2012
GS Internacional S/A
Dec. 31, 2012
HCA
Dec. 31, 2011
HCA
Dec. 31, 2012
Grand Venture
Feb. 29, 2012
Grand Venture
Schedule of Equity Method Investments [Line Items]                                        
Ownership percentage       40.00%   50.00% 30.00%                 40.00%        
Exchange rate at period end - MXN to USD             12.97 13.95                        
Average daily exchange rate for period - MXN to USD                   12.94 11.74 12.37 13.51 13.62 12.79          
Increase(Decrease) in equity method investment             $ 2,700,000 $ (500,000) $ 1,100,000                      
Cash dividend received             416,000 466,000 398,000                      
Due from related party             71,000 216,000                        
Equity in earnings, net of taxes 6,081,000 3,362,000 2,718,000   125,000   6,900,000 2,900,000 2,700,000             727,000        
Equity in earnings related to a bargain purchase gain             4,100,000                          
Equity in earnings, tax benefit             1,100,000                          
Fair Value of investment             1,300,000                          
Carrying value of investment             36,400,000                 6,800,000 100,000   400,000  
Payment for equity method investment                                   $ 105,000   $ 500,000