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Goodwill And Other Intangible Assets (Schedule Of Future Estimated Amortization Expense) (Details) - USD ($)
$ in Thousands
Nov. 30, 2018
Aug. 31, 2018
Finite-Lived Intangible Assets [Line Items]    
Net carrying amount $ 12,735 $ 13,513
Trade Names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Remainder of fiscal year 2019 1,840  
Fiscal year 2020 2,052  
Fiscal year 2021 1,262  
Fiscal year 2022 1,262  
Fiscal year 2023 1,016  
Thereafter 4,676  
Net carrying amount 12,108  
Customer-Based [Member]    
Finite-Lived Intangible Assets [Line Items]    
Remainder of fiscal year 2019 138  
Fiscal year 2020 163  
Fiscal year 2021 163  
Fiscal year 2022 163  
Net carrying amount $ 627