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Income Taxes - Additional Information (Detail) (USD $)
1 Months Ended 3 Months Ended 6 Months Ended
Jun. 01, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Dec. 31, 2011
Income Taxes [Line Items]            
Effective income tax rate   27.06% 26.08% 26.42% 27.21%  
Statutory rate         35.00%  
Quarterly cash dividend declared $ 0.0125          
Quarterly cash dividend first payable recorded date Jun. 15, 2012          
Expected total cash dividends for four quarters     $ 922,989   $ 922,989  
Accumulated Net Operating Losses (NOLs), for U.S. income tax purposes           $ 5,149,592
Income tax, statute of limitations period         5 years  
UNITED STATES
           
Income Taxes [Line Items]            
Statutory tax rate         34.00%  
State tax rate         0.00%  
PRC
           
Income Taxes [Line Items]            
Statutory tax rate         25.00%