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Provision for Income Taxes From Continuing Operations (Detail) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Components Of Income Tax Expense Benefit [Line Items]        
Deferred taxes - PRC     $ 160,826 $ (1,913,608)
Income taxes 1,975,189 3,352,345 3,309,659 9,285,467
CHINA
        
Components Of Income Tax Expense Benefit [Line Items]        
Current taxes - PRC 1,892,567 5,285,957 3,148,833 11,211,191
Deferred taxes - PRC $ 82,622 $ (1,933,612) $ 160,826 $ (1,925,724)