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INCOME TAX (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2018
Aug. 31, 2017
Aug. 31, 2016
Aug. 31, 2013
Blended Federal Statutory Income Tax Rate, Percent 25.70%      
Effective income tax rate from continuing operations 18.20% 23.30% 18.40%  
Statutory tax rate   35.00% 35.00%  
Income taxes (benefit) on discontinued operations $ (34) $ (5,997) $ (1,497)  
Valuation allowance against deferred tax assets 5,400      
Indefinitely reinvested foreign earnings 616,800      
Unrecognized tax benefits 3,121 9,283 $ 9,522 $ 27,349
Accrued interest and penalties on unrecognized tax benefits   1,200    
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit) $ 11,000      
Bonus Depreciation for Certain Capital Expenditures, Percent 100.00%      
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Change in Tax Rate, Deferred Tax Liability, Provisional Income Tax Benefit $ 37,400      
State        
Net operating losses carry forward $ 474,300      
Foreign        
Statutory tax rate 19.00%      
Net operating losses carry forward $ 762,400      
Valuation allowance, net operating loss carryforwards        
Valuation allowance against deferred tax assets   $ 121,000