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Segment Information (Schedule Of Segment Operations) (Details) - USD ($)
$ in Thousands
12 Months Ended
Aug. 31, 2016
Aug. 31, 2015
Aug. 31, 2014
Segment Reporting Information [Line Items]      
Sales to external customers $ 200,055 $ 209,941 $ 205,165
Gross profit 135,154 138,089 138,266
Adjusted EBITDA 26,894 31,858 34,420
Direct Offices [Member]      
Segment Reporting Information [Line Items]      
Sales to external customers 103,613 113,087 115,085
Gross profit 74,642 81,057 82,162
Adjusted EBITDA 17,701 18,801 21,667
Strategic Markets [Member]      
Segment Reporting Information [Line Items]      
Sales to external customers 29,778 37,039 31,841
Gross profit 18,749 21,680 18,156
Adjusted EBITDA 3,536 8,418 4,625
Education Practice [Member]      
Segment Reporting Information [Line Items]      
Sales to external customers 40,361 33,128 30,883
Gross profit 24,030 18,797 18,591
Adjusted EBITDA 4,372 2,531 4,315
International Licensees [Member]      
Segment Reporting Information [Line Items]      
Sales to external customers 17,629 17,100 17,065
Gross profit 13,667 12,896 13,505
Adjusted EBITDA 9,174 7,198 8,406
Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Sales to external customers 191,381 200,354 194,874
Gross profit 131,088 134,430 132,414
Adjusted EBITDA 34,783 36,948 39,013
Corporate And Eliminations [Member]      
Segment Reporting Information [Line Items]      
Sales to external customers 8,674 9,587 10,291
Gross profit 4,066 3,659 5,852
Adjusted EBITDA $ (7,889) $ (5,090) $ (4,593)