CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
Sep. 30, 2011
Dec. 31, 2010
Customer deposits, allowance for doubtful accounts $ 640,845 $ 539,433
Accounts receivable, allowance for doubtful accounts 10,981,086 18,296,842
Accounts payable 6,311,890 8,148,688
Accrued payroll and welfare expenses 36,222,102 37,853,279
Income tax payable 24,760,675 42,276,115
Other tax payable 16,097,534 14,765,431
Liability for exclusive rights, current 13,359,983  
Other current liabilities 23,306,933 23,927,768
Deferred tax liabilities 43,102,276 40,152,455
Liability for exclusive rights, non-current 20,679,586  
Ordinary shares, par value (in dollars per share) $ 0.001 $ 0.001
Ordinary shares, shares authorized (in shares) 1,000,000,000 1,000,000,000
Ordinary shares, shares issued (in shares) 78,703,087 80,752,526
Ordinary shares, shares outstanding (in shares) 78,703,087 80,752,526
Consolidated VIEs without recourse
    
Accounts payable 2,110,761 2,777,692
Accrued payroll and welfare expenses 11,671,668 5,998,335
Income tax payable 3,099,422 3,824,260
Other tax payable 4,290,915 2,965,717
Liability for exclusive rights, current 13,359,983  
Other current liabilities 14,963,468 6,728,488
Deferred tax liabilities 1,712,234 424,931
Liability for exclusive rights, non-current $ 20,679,586