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Income Taxes (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Federal:    
Current $ 3,136,830 $ 1,395,568
Deferred 2,847,899 4,191,095
Federal Income Tax Expense (Benefit) 5,984,729 5,586,663
State:    
Current 358,533   
Deferred 903,625 1,139,068
State Income Tax Expense (Benefit) 1,262,158 1,139,068
Income Tax Expense (Benefit) $ 7,246,887 $ 6,725,731