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Contract Termination And Restructuring Costs (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Feb. 28, 2017
Aug. 31, 2016
Aug. 31, 2017
Aug. 31, 2016
Aug. 31, 2015
Restructuring Cost and Reserve [Line Items]          
Contract termination costs     $ 1,500    
Restructuring charges     1,482 $ 776 $ 587
Contract Termination [Member]          
Restructuring Cost and Reserve [Line Items]          
Profit sharing agreement, termination payment     1,500    
Fiscal 2017 Restructuring Costs [Member]          
Restructuring Cost and Reserve [Line Items]          
Restructuring charges     3,600    
Fiscal 2017 Restructuring Costs [Member] | Exit Japan Publishing Business [Member]          
Restructuring Cost and Reserve [Line Items]          
Restructuring charges     2,100    
Fiscal 2017 Restructuring Costs [Member] | US and Canada Direct Office Restructuring [Member]          
Restructuring Cost and Reserve [Line Items]          
Restructuring charges     1,482    
Office closure costs     496    
Fiscal 2016 Restructuring Costs [Member]          
Restructuring Cost and Reserve [Line Items]          
Restructuring charges   $ 400      
Office closure costs     400    
Fiscal 2015 Restructuring Costs [Member]          
Restructuring Cost and Reserve [Line Items]          
Restructuring charges         587
Office closure costs         $ 17
Accrued restructuring costs     $ 0    
License Agreement [Member] | Contract Termination [Member]          
Restructuring Cost and Reserve [Line Items]          
License agreement period     10 years    
Royalty payments     $ 5,400    
Royalty ratio, obligated     33.00%    
Royalty ratio, excess of the contractual minimums     33.00%    
Royalty revenue     $ 900    
Contract termination costs $ 1,500        
Profit-Sharing Agreement [Member] | Contract Termination [Member]          
Restructuring Cost and Reserve [Line Items]          
Royalty payments     300    
Maximum [Member] | Fiscal 2016 Restructuring Costs [Member] | Severance [Member]          
Restructuring Cost and Reserve [Line Items]          
Restructuring charges     40    
Minimum [Member] | License Agreement [Member] | Contract Termination [Member]          
Restructuring Cost and Reserve [Line Items]          
Royalty payments     $ 16,100