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Provision for Income Taxes (Detail) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Income Taxes [Line Items]        
Current Tax Provision - PRC $ 1,273,977 $ 2,104,140 $ 3,100,628 $ 3,975,157
Deferred Tax Provision            
Total Provision for Income Taxes $ 1,273,977 $ 2,104,140 $ 3,100,628 $ 3,975,157