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BUSINESS SEGMENTS (Reconciliations of Earnings from Continuing Operations to Adjusted Operating Profit) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 31, 2020 | May 31, 2020 | Feb. 29, 2020 | Nov. 30, 2019 | Aug. 31, 2019 | May 31, 2019 | Feb. 28, 2019 | Nov. 30, 2018 | Aug. 31, 2020 | Aug. 31, 2019 | Aug. 31, 2018
Segment Reporting [Abstract] |  |  |  |  |  |  |  |  |  |  |
Earnings from continuing operations | $ 67,782 | $ 64,169 | $ 63,596 | $ 82,755 | $ 85,880 | $ 78,551 | $ 14,928 | $ 19,420 | $ 278,302 | $ 198,779 | $ 135,237
Interest expense |  |  |  |  |  |  |  |  | (61,837) | (71,373) | (40,957)
Income taxes |  |  |  |  |  |  |  |  | (92,476) | (69,681) | (30,147)
Amortization of acquired unfavorable contract backlog |  |  |  |  |  |  |  |  | (29,367) | (74,784) | 0
Impairment of assets |  |  |  |  |  |  |  |  | (7,611) | (384) | (14,372)
Adjusted EBITDA from continuing operations |  |  |  |  |  |  |  |  | $ 576,608 | $ 424,085 | $ 352,221

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