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Goodwill And Other Intangible Assets (Schedule Of Future Estimated Amortization Expense) (Details) - USD ($)
$ in Thousands
Feb. 28, 2018
Aug. 31, 2017
Finite-Lived Intangible Assets [Line Items]    
Net carrying amount $ 15,221 $ 16,244
Trade Names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Remainder of fiscal year 2018 1,238  
Fiscal year 2019 2,466  
Fiscal year 2020 2,071  
Fiscal year 2021 1,281  
Fiscal year 2022 1,281  
Thereafter 5,809  
Net carrying amount 14,146  
Customer-Based [Member]    
Finite-Lived Intangible Assets [Line Items]    
Remainder of fiscal year 2018 241  
Fiscal year 2019 280  
Fiscal year 2020 178  
Fiscal year 2021 179  
Fiscal year 2022 179  
Net carrying amount 1,057  
Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Remainder of fiscal year 2018 18  
Net carrying amount $ 18