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Intangible Assets And Goodwill (Amortization Expense For Intangible Assets Over The Next Five Years) (Details)
$ in Thousands
Aug. 31, 2017
USD ($)
Acquired License Rights For Intellectual Property [Abstract]  
2018 $ 5,368
2019 4,790
2020 4,324
2021 3,809
2022 $ 3,498