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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables) | 12 Months Ended
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Aug. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Changes in the carrying amount of goodwill | The following table details the changes in the carrying amount of goodwill by reportable segment:
(in thousands) |  | Americas Recycling |  | Americas Mills |  | Americas Fabrication |  | International Mill |  | Corporate and Other* |  | Consolidated
Goodwill, gross |  |  |  |  |  |  |  |  |  |  |  |
Balance at September 1, 2016 |  | $ | 9,751 |  |  | $ | 4,970 |  |  | $ | 57,637 |  |  | $ | 2,432 |  |  | $ | 1,982 |  |  | $ | 76,772 |
| Acquisitions |  | — |  |  | — |  |  | 306 |  |  | — |  |  | — |  |  | 306 |
| Foreign currency translation |  | — |  |  | — |  |  | — |  |  | 232 |  |  | — |  |  | 232 |
Balance at August 31, 2017 |  | 9,751 |  |  | 4,970 |  |  | 57,943 |  |  | 2,664 |  |  | 1,982 |  |  | 77,310 |
| Dispositions |  | (208 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | (208 | )
| Impairments |  | — |  |  | — |  |  | (515 | ) |  | — |  |  | — |  |  | (515 | )
| Foreign currency translation |  | — |  |  | — |  |  | — |  |  | (96 | ) |  | — |  |  | (96 | )
| Reclassification to assets of discontinued operations |  | — |  |  | — |  |  | — |  |  | — |  |  | (1,982 | ) |  | (1,982 | )
Balance at August 31, 2018 |  | $ | 9,543 |  |  | $ | 4,970 |  |  | $ | 57,428 |  |  | $ | 2,568 |  |  | $ | — |  |  | $ | 74,509 |
Accumulated impairment losses |  |  |  |  |  |  |  |  |  |  |  |
Balance at September 1, 2016 |  | $ | (9,751 | ) |  | $ | — |  |  | $ | (493 | ) |  | $ | (155 | ) |  | $ | — |  |  | $ | (10,399 | )
| Foreign currency translation |  | — |  |  | — |  |  | — |  |  | (14 | ) |  | — |  |  | (14 | )
| Impairment |  | — |  |  | — |  |  | — |  |  | — |  |  | (1,982 | ) |  | (1,982 | )
Balance at August 31, 2017 |  | (9,751 | ) |  | — |  |  | (493 | ) |  | (169 | ) |  | (1,982 | ) |  | (12,395 | )
| Dispositions |  | 208 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 208 |
| Foreign currency translation |  | — |  |  | — |  |  | — |  |  | 6 |  |  | — |  |  | 6 |
| Reclassification to assets of discontinued operations |  | — |  |  | — |  |  | — |  |  | — |  |  | 1,982 |  |  | 1,982 |
Balance at August 31, 2018 |  | $ | (9,543 | ) |  | $ | — |  |  | $ | (493 | ) |  | $ | (163 | ) |  | $ | — |  |  | $ | (10,199 | )
Goodwill, net |  |  |  |  |  |  |  |  |  |  |  |
Balance at September 1, 2016 |  | $ | — |  |  | $ | 4,970 |  |  | $ | 57,144 |  |  | $ | 2,277 |  |  | $ | 1,982 |  |  | $ | 66,373 |
| Acquisitions |  | — |  |  | — |  |  | 306 |  |  | — |  |  | — |  |  | 306 |
| Foreign currency translation |  | — |  |  | — |  |  | — |  |  | 218 |  |  | — |  |  | 218 |
| Impairment |  | — |  |  | — |  |  | — |  |  | — |  |  | (1,982 | ) |  | (1,982 | )
Balance at August 31, 2017 |  | — |  |  | 4,970 |  |  | 57,450 |  |  | 2,495 |  |  | — |  |  | 64,915 |
| Impairments |  | — |  |  | — |  |  | (515 | ) |  | — |  |  | — |  |  | (515 | )
| Foreign currency translation |  | — |  |  | — |  |  | — |  |  | (90 | ) |  | — |  |  | (90 | )
Balance at August 31, 2018 |  | $ | — |  |  | $ | 4,970 |  |  | $ | 56,935 |  |  | $ | 2,405 |  |  | $ | — |  |  | $ | 64,310 |
Intangible assets subject to amortization | The following intangible assets subject to amortization are included in other noncurrent assets on the Company's consolidated balance sheets:
|  | August 31, 2018 |  | August 31, 2017
(in thousands) |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net
Customer base |  | $ | 6,254 |  |  | $ | 3,416 |  |  | $ | 2,838 |  |  | $ | 6,334 |  |  | $ | 2,660 |  |  | $ | 3,674 |
Favorable land leases |  | 4,476 |  |  | 755 |  |  | 3,721 |  |  | 10,189 |  |  | 2,849 |  |  | 7,340 |
Non-compete agreements |  | 1,750 |  |  | 798 |  |  | 952 |  |  | 1,750 |  |  | 578 |  |  | 1,172 |
Brand name |  | 928 |  |  | 662 |  |  | 266 |  |  | 1,328 |  |  | 770 |  |  | 558 |
Patents |  | 6,993 |  |  | 777 |  |  | 6,216 |  |  | — |  |  | — |  |  | — |
Other |  | 101 |  |  | 72 |  |  | 29 |  |  | 101 |  |  | 65 |  |  | 36 |
Total |  | $ | 20,502 |  |  | $ | 6,480 |  |  | $ | 14,022 |  |  | $ | 19,702 |  |  | $ | 6,922 |  |  | $ | 12,780 |
Estimated future amortization expense of intangible assets | Estimated amounts of amortization expense for the next five years are as follows.
Year Ended August 31, |  | (in thousands)
2019 |  | $ | 2,027 |
2020 |  | 1,793 |
2021 |  | 1,770 |
2022 |  | 1,493 |
2023 |  | 1,034 |

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