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BUSINESS SEGMENTS (Summary of Certain Financial Information from Continuing Operations by Reportable Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Nov. 30, 2019 | Nov. 30, 2018 | Aug. 31, 2019
Segment Reporting Information [Line Items] |  |  |
Net sales | $ 1,384,708 | $ 1,277,342 |
Adjusted EBITDA from continuing operations | 159,805 | 65,536 |
Total assets | 3,808,351 |  | $ 3,758,771
Continuing Operations |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 1,384,708 | 1,277,342 |
Americas Recycling |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 172,151 | 240,181 |
Americas Mills |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 474,192 | 373,671 |
Americas Fabrication |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 570,377 | 434,558 |
International Mill |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 165,040 | 226,673 |
Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 2,948 | 2,259 |
Intersegment | Continuing Operations |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 0 | 0 |
Intersegment | Americas Recycling |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 50,110 | 61,828 |
Intersegment | Americas Mills |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 294,701 | 228,182 |
Intersegment | Americas Fabrication |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 1,470 | 2,553 |
Intersegment | International Mill |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 349 | 351 |
Intersegment | Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | (346,630) | (292,914) |
Segments | Continuing Operations |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 1,384,708 | 1,277,342 |
Adjusted EBITDA from continuing operations | 159,805 | 65,536 |
Total assets | 3,808,351 |  | 3,758,771
Segments | Americas Recycling |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 222,261 | 302,009 |
Adjusted EBITDA from continuing operations | 3,417 | 15,434 |
Total assets | 251,115 |  | 257,517
Segments | Americas Mills |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 768,893 | 601,853 |
Adjusted EBITDA from continuing operations | 155,025 | 113,873 |
Total assets | 1,632,290 |  | 1,667,366
Segments | Americas Fabrication |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 571,847 | 437,111 |
Adjusted EBITDA from continuing operations | 17,481 | (36,996) |
Total assets | 1,123,785 |  | 1,106,420
Segments | International Mill |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 165,389 | 227,024 |
Adjusted EBITDA from continuing operations | 11,359 | 32,779 |
Total assets | 483,718 |  | 464,177
Segments | Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | (343,682) | (290,655) |
Adjusted EBITDA from continuing operations | (27,477) | $ (59,554) |
Total assets | $ 317,443 |  | $ 263,291

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