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GOODWILL AND OTHER INTANGIBLE ASSETS (Changes in the Carrying Amount of Goodwill) (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 31, 2015 | Aug. 31, 2016 | Aug. 31, 2015 | Aug. 31, 2014
Goodwill [Line Items] |  |  |  |
Goodwill | $ 76,787,000 | $ 76,772,000 | $ 76,787,000 | $ 84,127,000
Accumulated impairment losses | (10,404,000) | (10,399,000) | (10,404,000) | (9,808,000)
Goodwill, net | 66,383,000 | 66,373,000 | 66,383,000 | 74,319,000
Impairment |  | 0 | (7,267,000) | 0
Goodwill reclassified to assets held for sale |  |  | (6,643,000) |
Accumulated impairment losses reclassified to assets held for sale |  |  | 6,643,000 |
Translation |  | (10,000) | (669,000) |
Americas Recycling |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 9,751,000 | 9,751,000 | 9,751,000 | 9,751,000
Accumulated impairment losses | (9,751,000) | (9,751,000) | (9,751,000) | (2,484,000)
Goodwill, net | 0 | 0 | 0 | 7,267,000
Impairment |  | 0 | (7,267,000) |
Goodwill reclassified to assets held for sale |  |  | 0 |
Accumulated impairment losses reclassified to assets held for sale |  |  | 0 |
Translation |  | 0 | 0 |
Americas Mills |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 4,970,000 | 4,970,000 | 4,970,000 | 4,970,000
Accumulated impairment losses | 0 | 0 | 0 | 0
Goodwill, net | 4,970,000 | 4,970,000 | 4,970,000 | 4,970,000
Impairment |  |  | 0 |
Goodwill reclassified to assets held for sale |  |  | 0 |
Accumulated impairment losses reclassified to assets held for sale |  |  | 0 |
Translation |  | 0 | 0 |
Americas Fabrication |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 57,637,000 | 57,637,000 | 57,637,000 | 57,637,000
Accumulated impairment losses | (493,000) | (493,000) | (493,000) | (493,000)
Goodwill, net | 57,144,000 | 57,144,000 | 57,144,000 | 57,144,000
Impairment |  |  | 0 |
Goodwill reclassified to assets held for sale |  |  | 0 |
Accumulated impairment losses reclassified to assets held for sale |  |  | 0 |
Translation |  | 0 | 0 |
International Mill |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 2,517,000 | 2,432,000 | 2,517,000 | 2,964,000
Accumulated impairment losses | (160,000) | (155,000) | (160,000) | (188,000)
Goodwill, net | 2,357,000 | 2,277,000 | 2,357,000 | 2,776,000
Impairment |  |  | 0 |
Translation |  | (80,000) | (419,000) |
International Marketing and Distribution |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 1,912,000 | 1,982,000 | 1,912,000 | 8,805,000
Accumulated impairment losses | 0 | 0 | 0 | (6,643,000)
Goodwill, net | 1,912,000 | 1,982,000 | 1,912,000 | $ 2,162,000
Impairment |  |  | 0 |
Goodwill reclassified to assets held for sale |  |  | (6,643,000) |
Accumulated impairment losses reclassified to assets held for sale |  |  | 6,643,000 |
Translation |  | $ 70,000 | $ (250,000) |
Assets Held-for-sale | International Marketing and Distribution |  |  |  |
Goodwill, Impaired, Accumulated Impairment Loss [Abstract] |  |  |  |
Goodwill related to assets sold | 1,600,000 |  |  |
Goodwill amortization related to assets sold | $ 1,600,000 |  |  |

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