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Goodwill And Other Intangible Assets (Summary Of Definite-Lived Intangible Assets) (Details) - USD ($)
$ in Thousands
Nov. 30, 2018
Aug. 31, 2018
Goodwill And Other Intangible Assets [Abstract]    
Gross carrying amount $ 35,964 $ 36,122
Accumulated amortization (23,229) (22,609)
Net carrying amount $ 12,735 $ 13,513