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Discontinued Operations (Tables)
12 Months Ended
Aug. 31, 2011
Discontinued Operations [Abstract] 
Financial information for discontinued operations
                         
(in thousands)   2011   2010   2009
 
At August 31,
                       
Current assets
  $ 224     $ 10,850     $ 60,594  
Noncurrent assets
    10,775       27,045       79,861  
Current liabilities
    7,862       14,723       25,885  
Noncurrent liabilities
          22       72  
 
                       
Fiscal Year
                       
Revenue
    1,369       122,971       474,056  
Earnings (loss) before taxes
    (2,965 )     (59,762 )     31,991