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Note 6. Segment Information (Detail) (USD $)
In Thousands, unless otherwise specified
Aug. 31, 2012
Aug. 31, 2011
Aug. 31, 2010
Goodwill (in Dollars) $ 245,791 $ 228,265 $ 221,991
United States [Member]
     
Goodwill (in Dollars) 167,817 145,826 145,826
Goodwill Percentage Per Segment 68.00%    
European [Member]
     
Goodwill Percentage Per Segment 30.00%    
Asia Pacific [Member]
     
Goodwill (in Dollars) $ 4,168 $ 4,267 $ 3,887
Goodwill Percentage Per Segment 2.00%