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GOODWILL AND INTANGIBLE ASSETS (Details 5) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 24, 2016 | Jun. 25, 2016 | Dec. 26, 2015 | Dec. 26, 2015
Goodwill [Line Items] |  |  |  |
Impairment of intangible assets |  |  | $ 19,600 |
Divestiture of business |  |  |  | $ (1,737)
Goodwill impairment |  |  | 7,100 | 34,892
Engineered Support Structures |  |  |  |
Goodwill [Line Items] |  |  |  |
Divestiture of business |  | $ 1,737 |  | (1,737)
Goodwill impairment |  |  |  | 0
Coatings |  |  |  |
Goodwill [Line Items] |  |  |  |
Divestiture of business |  |  |  | 0
Goodwill impairment |  |  |  | 16,222
Energy and Mining Segment |  |  |  |
Goodwill [Line Items] |  |  |  |
Divestiture of business |  |  |  | 0
Goodwill impairment |  |  | $ 19,000 | $ 18,670
Webforge | Engineered Support Structures |  |  |  |
Goodwill [Line Items] |  |  |  |
Impairment of intangible assets | $ 5,830 |  |  |
Industrial Galvanizers | Coatings |  |  |  |
Goodwill [Line Items] |  |  |  |
Impairment of intangible assets | $ 1,100 |  |  |

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