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Goodwill And Other Intangible Assets (Summary Of Definite-Lived Intangible Assets) (Details) - USD ($)
$ in Thousands
Feb. 28, 2019
Aug. 31, 2018
Goodwill And Other Intangible Assets [Abstract]    
Gross carrying amount $ 36,317 $ 36,122
Accumulated amortization (24,152) (22,609)
Net carrying amount $ 12,165 $ 13,513