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STOCK-BASED COMPENSATION PLANS (Yearly Activity of Stock Purchase Plan) (Details) - $ / shares
12 Months Ended
Aug. 31, 2019
Aug. 31, 2018
Aug. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for future issuance 8,021,005    
Employee stock purchase plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares subscribed 446,950 289,040 173,420
Price per share $ 13.80 $ 17.84 $ 18.99
Shares purchased 226,860 123,930 166,220
Price per share $ 17.84 $ 18.99 $ 12.04
Shares available for future issuance 2,753,214