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Goodwill And Other Intangible Assets (Schedule Of Future Estimated Amortization Expense) (Details) - USD ($)
$ in Thousands
Aug. 31, 2015
Aug. 31, 2014
Aug. 31, 2013
Finite-Lived Intangible Assets [Line Items]      
Net carrying amount $ 22,961 $ 23,671 $ 24,292
Trade Names [Member]      
Finite-Lived Intangible Assets [Line Items]      
Fiscal year 2016 2,459    
Fiscal year 2017 2,453    
Fiscal year 2018 2,453    
Fiscal year 2019 2,453    
Fiscal year 2020 2,059    
Thereafter 8,477    
Net carrying amount 20,354    
Customer Lists [Member]      
Finite-Lived Intangible Assets [Line Items]      
Fiscal year 2016 531    
Fiscal year 2017 530    
Fiscal year 2018 530    
Fiscal year 2019 308    
Fiscal year 2020 196    
Thereafter 393    
Net carrying amount 2,488    
Technology-Based [Member]      
Finite-Lived Intangible Assets [Line Items]      
Fiscal year 2016 40    
Fiscal year 2017 40    
Fiscal year 2018 39    
Net carrying amount $ 119