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Goodwill And Other Intangible Assets (Schedule Of Future Estimated Amortization Expense) (Details) - USD ($)
$ in Thousands
Nov. 30, 2017
Aug. 31, 2017
Finite-Lived Intangible Assets [Line Items]    
Net carrying amount $ 15,790 $ 16,244
Trade Names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Remainder of fiscal year 2018 1,846  
Fiscal year 2019 2,455  
Fiscal year 2020 2,060  
Fiscal year 2021 1,270  
Fiscal year 2022 1,270  
Thereafter 5,742  
Net carrying amount 14,643  
Customer-Based [Member]    
Finite-Lived Intangible Assets [Line Items]    
Remainder of fiscal year 2018 344  
Fiscal year 2019 267  
Fiscal year 2020 170  
Fiscal year 2021 170  
Fiscal year 2022 170  
Net carrying amount 1,121  
Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Remainder of fiscal year 2018 26  
Net carrying amount $ 26