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STOCK-BASED COMPENSATION PLANS (Combined Activity for Stock Appreciation Rights and Stock Options Excluding the Cash Component) (Details) - Stock appreciation rights and stock options excluding the cash component - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Aug. 31, 2015
Aug. 31, 2014
Aug. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Outstanding, number, beginning balance 1,437,031 2,653,430 2,930,492
Granted, number     185,004
Exercised, number (142,604) (223,473) (4,105)
Forfeited / expired, number (452,210) (992,926) (457,961)
Outstanding, number, ending balance 842,217 1,437,031 2,653,430
Exercisable, number 789,498    
Outstanding, weighted average exercise price, beginning balance $ 19.85 $ 24.07 $ 24.81
Granted, weighted average exercise price     14.25
Exercised, weighted average exercise price 11.80 11.84 11.60
Forfeited / expired, weighted average exercise price 35.10 32.93 24.91
Outstanding, weighted average exercise price, ending balance 13.04 $ 19.85 $ 24.07
Exercisable, weighted average exercise price $ 12.95    
Outstanding, weighted average remaining contractual life (years) 2 years 8 months 12 days 2 years 8 months 23 days 2 years 9 months 18 days
Exercisable, weighted average remaining contractual life (years) 2 years 7 months 6 days    
Outstanding, aggregated intrinsic value $ 2,243,765 $ 4,384,668 $ 2,867,175
Exercisable, aggregated intrinsic value $ 2,168,298    
Remaining unvested stock appreciation rights and stock options expected to vest, number 50,083    
Remaining unvested options and SARs expected to vest, weighted average exercise price $ 14.27    
Intrinsic value of SARs and options exercised   $ 1,700