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Business Acquisitions (Schedule Of Estimated Fair Values Of Assets Acquired, Liabilities Assumed, and Identifiable Intangible Assets) (Details) - USD ($)
$ in Thousands
Aug. 31, 2017
Jul. 11, 2017
May 15, 2017
Aug. 31, 2016
Aug. 31, 2015
Business Acquisition, Contingent Consideration [Line Items]          
Goodwill $ 24,220     $ 19,903 $ 19,903
Robert Gregory Partners, LLC [Member]          
Business Acquisition, Contingent Consideration [Line Items]          
Accounts receivable     $ 458    
Prepaid expenses and other current assets     136    
Intangible assets     3,811    
Goodwill     1,232    
Assets acquired     5,637    
Accounts payable     (51)    
Accrued expenses     (80)    
Deferred revenue     (593)    
Liabilities assumed     (724)    
Purchase price     $ 4,913    
Jhana Education [Member]          
Business Acquisition, Contingent Consideration [Line Items]          
Cash   $ 253      
Accounts receivable   195      
Prepaid expenses and other current assets   86      
Deferred tax asset   3,138      
Intangible assets   6,076      
Goodwill   3,085      
Assets acquired   12,833      
Accounts payable   (185)      
Accrued expenses   (19)      
Deferred tax liability   (2,257)      
Deferred revenue   (795)      
Liabilities assumed   (3,256)      
Purchase price   $ 9,577