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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tax Receivables) (Narrative) (Details) - USD ($)
$ in Thousands
May 31, 2019
Aug. 31, 2018
Tax Receivables [Line Items]    
Value added tax receivable $ 25,136 $ 25,145
Income taxes receivable 28,374 24,509
Unknown Country [Member]    
Tax Receivables [Line Items]    
Value added tax receivable 4,300 3,100
Deferred tax assets, net 2,300 2,100
Income taxes receivable $ 7,500 $ 7,100