Note 10 - Income Taxes (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Nov. 30, 2012
Nov. 30, 2011
Effective Income Tax Rate, Continuing Operations 38.00% 36.00%
Unrecognized Tax Benefits (in Dollars) $ 6.5  
Unrecognized Tax Benefits that Would Impact Effective Tax Rate (in Dollars) $ 6.5  
Scenario, Forecast [Member]
   
Effective Income Tax Rate, Continuing Operations 37.00%