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Fair Value Of Financial Instruments (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Jul. 11, 2017
May 15, 2017
Aug. 31, 2017
Aug. 31, 2017
Aug. 31, 2016
Aug. 31, 2013
Aug. 31, 2015
Payment of contingent consideration         $ 2,167    
Robert Gregory Partners, LLC [Member]              
Purchase price   $ 4,913          
Contingent consideration   4,500          
Fair value of contingent consideration   $ 1,413          
Robert Gregory Partners, LLC [Member] | Other Long-Term Assets [Member]              
Contingent consideration     $ 900 $ 900      
Jhana Education [Member]              
Purchase price $ 9,577            
Contingent consideration 7,200            
Fair value of contingent consideration $ 6,052            
Jhana Education [Member] | Accrued Liabilities [Member]              
Contingent consideration     2,700 2,700      
Jhana Education [Member] | Other Long-Term Liabilities [Member]              
Contingent consideration     3,400 3,400      
NinetyFive 5, LLC [Member]              
Purchase price           $ 8,500  
Contingent consideration     1,936   $ 2,565
Payment of contingent consideration         $ 2,167    
Add On Coaching Services [Member] | Robert Gregory Partners, LLC [Member]              
Payment of contingent consideration     $ 500        
Expected To Be Paid During First And Second Quarter Of Fiscal 2018 [Member] | Jhana Education [Member]              
Payment of contingent consideration       1,000      
Revenues Over Measurement Period [Member] | Jhana Education [Member]              
Payment of contingent consideration       $ 5,200