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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, 2015 | Aug. 31, 2014 | Aug. 31, 2013 | Aug. 31, 2015 | Aug. 31, 2014 | Aug. 31, 2013
Goodwill [Line Items] |  |  |  |  |  |  |  |
Goodwill |  | $ 76,787,000 | $ 84,127,000 | $ 79,074,000 | $ 79,074,000 | $ 76,787,000 | $ 84,127,000 | $ 79,074,000
Accumulated impairment losses |  | (10,404,000) | (9,808,000) | (9,495,000) | (9,495,000) | (10,404,000) | (9,808,000) | (9,495,000)
Goodwill, net |  |  |  |  |  | 66,383,000 | 74,319,000 | 69,579,000
Goodwill [Abstract] |  |  |  |  |  |  |  |
Goodwill, beginning |  |  | 84,127,000 | 79,074,000 |  |  |  |
Acquisition |  |  |  | 4,675,000 |  |  |  |
Translation |  |  | (669,000) | 65,000 |  |  |  |
Goodwill reclassified to assets held for sale (1) | [1] |  | (6,643,000) |  |  |  |  |
Goodwill, ending |  | 76,787,000 | 76,787,000 | 84,127,000 | 79,074,000 |  |  |
Goodwill, Impaired, Accumulated Impairment Loss [Abstract] |  |  |  |  |  |  |  |
Accumulated impairment losses, beginning |  |  | (9,808,000) | (9,495,000) |  |  |  |
Impairment |  |  | (7,267,000) | 0 | (6,400,000) |  |  |
Accumulated impairment losses reclassified to assets held for sale (1) | [1] |  | 6,643,000 |  |  |  |  |
Accumulated impairment losses, ending |  | (10,404,000) | (10,404,000) | (9,808,000) | (9,495,000) |  |  |
Americas Recycling |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |
Goodwill |  | 9,751,000 | 9,751,000 | 9,751,000 | 9,751,000 | 9,751,000 | 9,751,000 | 9,751,000
Accumulated impairment losses |  | (9,751,000) | (2,484,000) | (2,484,000) | (2,484,000) | (9,751,000) | (2,484,000) | (2,484,000)
Goodwill, net |  |  |  |  |  | 0 | 7,267,000 | 7,267,000
Goodwill [Abstract] |  |  |  |  |  |  |  |
Goodwill, beginning |  |  | 9,751,000 | 9,751,000 |  |  |  |
Acquisition |  |  |  | 0 |  |  |  |
Translation |  |  | 0 | 0 |  |  |  |
Goodwill reclassified to assets held for sale (1) |  |  | 0 |  |  |  |  |
Goodwill, ending |  | 9,751,000 | 9,751,000 | 9,751,000 | 9,751,000 |  |  |
Goodwill, Impaired, Accumulated Impairment Loss [Abstract] |  |  |  |  |  |  |  |
Accumulated impairment losses, beginning |  |  | (2,484,000) | (2,484,000) |  |  |  |
Impairment |  |  | (7,267,000) |  | (6,400,000) |  |  |
Accumulated impairment losses reclassified to assets held for sale (1) |  |  | 0 |  |  |  |  |
Accumulated impairment losses, ending |  | (9,751,000) | (9,751,000) | (2,484,000) | (2,484,000) |  |  |
Americas Mills |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |
Goodwill |  | 4,970,000 | 4,970,000 | 295,000 | 295,000 | 4,970,000 | 4,970,000 | 295,000
Accumulated impairment losses |  | 0 | 0 | 0 | 0 | 0 | 0 | 0
Goodwill, net |  |  |  |  |  | 4,970,000 | 4,970,000 | 295,000
Goodwill [Abstract] |  |  |  |  |  |  |  |
Goodwill, beginning |  |  | 4,970,000 | 295,000 |  |  |  |
Acquisition |  |  |  | 4,675,000 |  |  |  |
Translation |  |  | 0 | 0 |  |  |  |
Goodwill reclassified to assets held for sale (1) |  |  | 0 |  |  |  |  |
Goodwill, ending |  | 4,970,000 | 4,970,000 | 4,970,000 | 295,000 |  |  |
Goodwill, Impaired, Accumulated Impairment Loss [Abstract] |  |  |  |  |  |  |  |
Accumulated impairment losses, beginning |  |  | 0 | 0 |  |  |  |
Impairment |  |  | 0 |  |  |  |  |
Accumulated impairment losses reclassified to assets held for sale (1) |  |  | 0 |  |  |  |  |
Accumulated impairment losses, ending |  | 0 | 0 | 0 | 0 |  |  |
Americas Fabrication |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |
Goodwill |  | 57,637,000 | 57,637,000 | 57,637,000 | 57,637,000 | 57,637,000 | 57,637,000 | 57,637,000
Accumulated impairment losses |  | (493,000) | (493,000) | (493,000) | (493,000) | (493,000) | (493,000) | (493,000)
Goodwill, net |  |  |  |  |  | 57,144,000 | 57,144,000 | 57,144,000
Goodwill [Abstract] |  |  |  |  |  |  |  |
Goodwill, beginning |  |  | 57,637,000 | 57,637,000 |  |  |  |
Acquisition |  |  |  | 0 |  |  |  |
Translation |  |  | 0 | 0 |  |  |  |
Goodwill reclassified to assets held for sale (1) |  |  | 0 |  |  |  |  |
Goodwill, ending |  | 57,637,000 | 57,637,000 | 57,637,000 | 57,637,000 |  |  |
Goodwill, Impaired, Accumulated Impairment Loss [Abstract] |  |  |  |  |  |  |  |
Accumulated impairment losses, beginning |  |  | (493,000) | (493,000) |  |  |  |
Impairment |  |  | 0 |  |  |  |  |
Accumulated impairment losses reclassified to assets held for sale (1) |  |  | 0 |  |  |  |  |
Accumulated impairment losses, ending |  | (493,000) | (493,000) | (493,000) | (493,000) |  |  |
International Mill |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |
Goodwill |  | 2,517,000 | 2,964,000 | 2,942,000 | 2,942,000 | 2,517,000 | 2,964,000 | 2,942,000
Accumulated impairment losses |  | (160,000) | (188,000) | (187,000) | (187,000) | (160,000) | (188,000) | (187,000)
Goodwill, net |  |  |  |  |  | 2,357,000 | 2,776,000 | 2,755,000
Goodwill [Abstract] |  |  |  |  |  |  |  |
Goodwill, beginning |  |  | 2,964,000 | 2,942,000 |  |  |  |
Acquisition |  |  |  | 0 |  |  |  |
Translation |  |  | $ (419,000) | 21,000 |  |  |  |
Goodwill reclassified to assets held for sale (1) |  |  |  |  |  |  |  |
Goodwill, ending |  | 2,517,000 | $ 2,517,000 | 2,964,000 | 2,942,000 |  |  |
Goodwill, Impaired, Accumulated Impairment Loss [Abstract] |  |  |  |  |  |  |  |
Accumulated impairment losses, beginning |  |  | (188,000) | (187,000) |  |  |  |
Impairment |  |  | $ 0 |  |  |  |  |
Accumulated impairment losses reclassified to assets held for sale (1) |  |  |  |  |  |  |  |
Accumulated impairment losses, ending |  | (160,000) | $ (160,000) | (188,000) | (187,000) |  |  |
International Marketing and Distribution |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |
Goodwill |  | 1,912,000 | 8,805,000 | 8,449,000 | 8,449,000 | 1,912,000 | 8,805,000 | 8,449,000
Accumulated impairment losses |  | 0 | (6,643,000) | (6,331,000) | (6,331,000) | 0 | (6,643,000) | (6,331,000)
Goodwill, net |  |  |  |  |  | $ 1,912,000 | $ 2,162,000 | $ 2,118,000
Goodwill [Abstract] |  |  |  |  |  |  |  |
Goodwill, beginning |  |  | 8,805,000 | 8,449,000 |  |  |  |
Acquisition |  |  |  | 0 |  |  |  |
Translation |  |  | (250,000) | 44,000 |  |  |  |
Goodwill reclassified to assets held for sale (1) | [1] |  | (6,643,000) |  |  |  |  |
Goodwill, ending |  | 1,912,000 | 1,912,000 | 8,805,000 | 8,449,000 |  |  |
Goodwill, Impaired, Accumulated Impairment Loss [Abstract] |  |  |  |  |  |  |  |
Accumulated impairment losses, beginning |  |  | (6,643,000) | (6,331,000) |  |  |  |
Impairment |  |  | 0 |  |  |  |  |
Accumulated impairment losses reclassified to assets held for sale (1) | [1] |  | 6,643,000 |  |  |  |  |
Accumulated impairment losses, ending |  | 0 | 0 | $ (6,643,000) | $ (6,331,000) |  |  |
Assets Held-for-sale | International Marketing and Distribution |  |  |  |  |  |  |  |
Goodwill [Abstract] |  |  |  |  |  |  |  |
Goodwill reclassified to assets held for sale (1) |  |  | $ (1,600,000) |  |  |  |  |
Goodwill, Impaired, Accumulated Impairment Loss [Abstract] |  |  |  |  |  |  |  |
Accumulated impairment losses reclassified to assets held for sale (1) |  | $ 1,600,000 |  |  |  |  |  |
[1] | Includes $1.6 million of goodwill and $1.6 million of accumulated goodwill impairment losses related to assets that were sold during the fourth quarter of fiscal 2015

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