SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Summary of Income Tax Receivables) (Details) - USD ($) $ in Thousands	Nov. 30, 2017	Aug. 31, 2017
Income Tax Receivables [Line Items]
Income Taxes Receivable, Prepaid expenses and other current assets	$ 6,910	$ 6,403
Income Taxes Receivable, Other non-current assets	13,494	10,492
Total amount of income tax receivables reported	$ 20,404	$ 16,895