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STOCK BASED COMPENSATION (Summary of Other Information Related to Stock-Based Compensation) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Aug. 31, 2018 | Aug. 31, 2017 | Aug. 31, 2016
STOCK BASED COMPENSATION [Abstract] |  |  |  |
Remaining unrecognized compensation cost (in thousands) | $ 29,473 |  | $ 26,382 | $ 32,380
Weighted average period of time over which this cost will be recognized (years) | 3 years |  | 3 years | 4 years
Excess tax benefit (deficiency) on stock-based compensation (in thousands) | $ 530 | [1] | $ 165 | $ 610
[1] | Beginning in the first quarter of fiscal year 2018, the Company began recording the tax savings resulting from tax deductions in excess of expense for stock-based compensation and the tax deficiencies resulting from stock-based compensation in excess of the related tax deduction as income tax expense or benefit, based on the adoption of ASU 2016-09. See Note 2 - Summary of Significant Accounting Policies for the Company's explanation of the accounting implications from the adoption of ASU 2016-09.

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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=96864182&loc=d3e11374-113907 + Details
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