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Goodwill And Other Intangible Assets (Summary Of Definite-Lived Intangible Assets) (Details) - USD ($)
$ in Thousands
Nov. 30, 2020
Aug. 31, 2020
Goodwill And Other Intangible Assets [Abstract]    
Gross carrying amount $ 36,340 $ 36,363
Accumulated amortization (28,072) (27,730)
Net carrying amount $ 8,268 $ 8,633