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GOODWILL AND INTANGIBLE ASSETS - Carrying Amount of Goodwill by Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 24, 2016 | Sep. 26, 2015 | Sep. 24, 2016 | Dec. 26, 2015
Goodwill |  |  |  |
Goodwill, Gross |  |  |  | $ 371,808
Carrying amount of goodwill |  |  |  |
Balance at the beginning of the period |  |  | $ 336,916 |
Balance at December 26, 2015 |  |  |  | (34,892)
Foreign currency translation |  |  | (9,053) |
Balance at the end of the period | $ 327,863 |  | 327,863 | 336,916
Engineered Support Structures Segment |  |  |  |
Goodwill |  |  |  |
Goodwill, Gross |  |  |  | 101,275
Carrying amount of goodwill |  |  |  |
Balance at the beginning of the period |  |  | 101,275 |
Foreign currency translation |  |  | (4,559) |
Balance at the end of the period | 96,716 |  | 96,716 | 101,275
Energy and Mining Segment |  |  |  |
Goodwill |  |  |  |
Goodwill, Gross |  |  |  | 99,829
Carrying amount of goodwill |  |  |  |
Balance at the beginning of the period |  |  | 81,159 |
Balance at December 26, 2015 |  | $ (19) |  | (18,670)
Foreign currency translation | (4,968) |  |  |
Balance at the end of the period | 76,191 |  | 76,191 | 81,159
Utility Support Structures Segment |  |  |  |
Goodwill |  |  |  |
Goodwill, Gross |  |  |  | 75,404
Carrying amount of goodwill |  |  |  |
Balance at the beginning of the period |  |  | 75,404 |
Foreign currency translation |  |  | 0 |
Balance at the end of the period | 75,404 |  | 75,404 | 75,404
Coatings Segment |  |  |  |
Goodwill |  |  |  |
Goodwill, Gross |  |  |  | 75,941
Carrying amount of goodwill |  |  |  |
Balance at the beginning of the period |  |  | 59,719 |
Balance at December 26, 2015 | (9,100) | $ (7) |  | (16,222)
Foreign currency translation |  |  | 163 |
Balance at the end of the period | 59,882 |  | 59,882 | 59,719
Irrigation Segment |  |  |  |
Goodwill |  |  |  |
Goodwill, Gross |  |  |  | 19,359
Carrying amount of goodwill |  |  |  |
Balance at the beginning of the period |  |  | 19,359 |
Foreign currency translation |  |  | 311 |
Balance at the end of the period | $ 19,670 |  | $ 19,670 | $ 19,359

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