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Goodwill And Other Intangible Assets (Schedule Of Future Estimated Amortization Expense) (Details) - USD ($)
$ in Thousands
Aug. 31, 2016
Aug. 31, 2015
Aug. 31, 2014
Finite-Lived Intangible Assets [Line Items]      
Net carrying amount $ 19,191 $ 22,961 $ 23,671
Trade Names [Member]      
Finite-Lived Intangible Assets [Line Items]      
Fiscal year 2017 2,422    
Fiscal year 2018 2,417    
Fiscal year 2019 2,417    
Fiscal year 2020 2,022    
Fiscal year 2021 1,232    
Thereafter 6,947    
Net carrying amount 17,457    
Customer Relationships [Member]      
Finite-Lived Intangible Assets [Line Items]      
Fiscal year 2017 452    
Fiscal year 2018 452    
Fiscal year 2019 262    
Fiscal year 2020 167    
Fiscal year 2021 167    
Thereafter 167    
Net carrying amount 1,667    
Technology [Member]      
Finite-Lived Intangible Assets [Line Items]      
Fiscal year 2017 34    
Fiscal year 2018 33    
Fiscal year 2019    
Fiscal year 2020    
Fiscal year 2021    
Thereafter    
Net carrying amount $ 67