SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Summary of Income Tax Receivables) (Details) - USD ($) $ in Thousands	Aug. 31, 2018	Aug. 31, 2017
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Income Taxes Receivable, Prepaid expenses and other current assets	$ 6,344	$ 6,403
Income Taxes Receivable, Other non-current assets	18,165	10,492
Total amount of income tax receivables reported	$ 24,509	$ 16,895