SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Summary of Income Tax Receivables) (Details) - USD ($) $ in Thousands	May 31, 2018	Aug. 31, 2017
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Income Taxes Receivable, Prepaid expenses and other current assets	$ 4,236	$ 6,403
Income Taxes Receivable, Other non-current assets	17,347	10,492
Total amount of income tax receivables reported	$ 21,583	$ 16,895