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Income Taxes (Details 1) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Schedule of Income tax expense , federal statutory rate    
Expected tax expense $ 6,214,573 $ 5,720,859
State income taxes, net of federal benefit 833,024 751,785
Change in valuation allowance (10,367) 59,553
Non-deductible items 209,657 193,534
Income Tax Expense (Benefit) $ 7,246,887 $ 6,725,731