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Income Taxes (Details Textual) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Income Taxes (Textual) [Abstract]    
Effective tax rate 30.00% 39.00%
Federal statutory rate 34.00%  
Decrease in income tax due to decrease in state tax effective rate $ 0.3