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Goodwill And Other Intangible Assets (Summary Of Definite-Lived Intangible Assets) (Details) - USD ($)
$ in Thousands
May 31, 2016
Aug. 31, 2015
Goodwill And Other Intangible Assets [Abstract]    
Gross carrying amount $ 37,100 $ 37,805
Accumulated amortization (16,670) (14,844)
Net carrying amount $ 20,430 $ 22,961