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Fair Value Of Financial Instruments (Narrative) (Details) - USD ($)
$ in Thousands
9 Months Ended
May 31, 2018
Aug. 31, 2017
Contingent consideration $ 5,458 $ 6,965
Robert Gregory Partners, LLC [Member]    
Contingent consideration 1,496 913
Robert Gregory Partners, LLC [Member] | Accrued Liabilities [Member]    
Contingent consideration 1,000  
Jhana Education [Member]    
Contingent consideration 3,962 $ 6,052
Contingent consideration payment classified as investing activities 1,100  
Jhana Education [Member] | Accrued Liabilities [Member]    
Contingent consideration $ 800