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Commitments And Contingencies (Summary Of Undiscounted Environmental Remediation Liability Classifications) (Details) (USD $)
In Thousands, unless otherwise specified
Aug. 31, 2014
Aug. 31, 2013
Commitments And Contingencies [Abstract]    
Other current liabilities $ 1,370 $ 1,740
Other noncurrent liabilities 5,025 5,200
Total environmental remediation liabilities $ 6,395 $ 6,940