SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Summary of Income Tax Receivables) (Details) - USD ($) $ in Thousands	Aug. 31, 2017	Aug. 31, 2016
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Income Taxes Receivable, Prepaid expenses and other current assets	$ 6,403	$ 6,402
Income Taxes Receivable, Other non-current assets	10,492	10,376
Total amount of income tax receivables reported	$ 16,895	$ 16,778