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Income Taxes (Schedule of the Components of Income Tax Benefit (Expense)) (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Current:      
Federal $ (3,185,743) $ (1,992,804) $ (2,665,404)
State and other (820,669) (422,290) (518,365)
Total current income tax expense (4,006,412) (2,415,094) (3,183,769)
Deferred:      
Federal 677,190 (1,543,261) 268,563
State 84,446 (121,849) 63,786
Deferred income tax benefit (expense) 761,636 (1,665,110) 332,349
Total income tax expense $ (3,244,776) $ (4,080,204) $ (2,851,420)