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Discontinued Operations (Financial Information For Discontinued Operations) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Nov. 30, 2012
Nov. 30, 2011
Aug. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Earnings (loss) before taxes $ 388 $ (27,003)  
Segment, Discontinued Operations [Member]
     
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Current assets 3,832   6,601
Revenue 0 14,144  
Earnings (loss) before taxes $ 388 $ (27,003)