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Intangible Assets And Goodwill (Consolidated Goodwill) (Details) - USD ($)
$ in Thousands
12 Months Ended
Aug. 31, 2017
Aug. 31, 2016
Beginning balance $ 19,903 $ 19,903
Accumulated impairments
Ending balance 24,220 $ 19,903
Robert Gregory Partners, LLC [Member]    
Acquisition of (Note 2) 1,232  
Jhana Education [Member]    
Acquisition of (Note 2) $ 3,085