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POST EMPLOYMENT PLANS (Summary of Other Post Employment Plans) (Details) - Other Post-Employment Plans [Member] - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2017
Aug. 31, 2016
Aug. 31, 2015
Accrued Salaries And Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Other Post Employment Plans $ 425 $ 358  
Other Long-Term Liability [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Other Post Employment Plans 2,720 2,395  
Restricted Cash Held [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Other Post Employment Plans [1] 2,493 2,188  
Operating Expense [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Operating Expenses $ 1,017 $ 1,026 $ 1,722
[1] With some locations, local statutes require the applicable Company subsidiary to deposit cash in its own name with designated fund managers. The funds earn interest which the Company recognizes as interest income.