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Income Taxes
6 Months Ended
Aug. 31, 2011
Income Taxes [Abstract] 
Income Taxes
Note 12. — Income Taxes
          The effective tax rate for the six months ended August 31, 2011 and 2010 was 31.4% and 33.2%, respectively. These rates differ from the Federal statutory rate primarily due to the effect of state taxes, the permanent non-deductibility of certain expenses for tax purposes, and research and experimentation credits.