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Goodwill And Other Intangible Assets (Schedule Of Future Estimated Amortization Expense) (Details) - USD ($)
$ in Thousands
Aug. 31, 2020
Aug. 31, 2019
Aug. 31, 2018
Finite-Lived Intangible Assets [Line Items]      
Net carrying amount $ 8,633 $ 10,652 $ 13,513
Trade Names [Member]      
Finite-Lived Intangible Assets [Line Items]      
Fiscal year 2021 1,271    
Fiscal year 2022 1,271    
Fiscal year 2023 1,025    
Fiscal year 2024 1,019    
Fiscal year 2025 941    
Thereafter 2,766    
Net carrying amount 8,293    
Customer-Based [Member]      
Finite-Lived Intangible Assets [Line Items]      
Fiscal year 2021 170    
Fiscal year 2022 170    
Net carrying amount $ 340