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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tax Receivables) (Narrative) (Details) - USD ($)
$ in Thousands
May 31, 2017
Aug. 31, 2016
Tax Receivables [Line Items]    
Value added tax receivable $ 30,467 $ 34,137
Income taxes receivable 15,984 16,778
Unknown Country [Member]    
Tax Receivables [Line Items]    
Value added tax receivable 3,000 $ 1,600
Deferred tax assets, net 2,000  
Income taxes receivable $ 3,900