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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Summary of Income Tax Receivables) (Details) - USD ($)
$ in Thousands
May 31, 2019
Aug. 31, 2018
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]    
Income Taxes Receivable, Prepaid expenses and other current assets $ 13,080 $ 6,344
Income Taxes Receivable, Other non-current assets 15,294 18,165
Total amount of income tax receivables reported $ 28,374 $ 24,509