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GOODWILL AND INTANGIBLE ASSETS - Carrying Amount of Goodwill by Segment (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 29, 2019 | Dec. 29, 2018
Goodwill |  |
Gross balance, beginning |  | $ 434,454
Accumulated impairment losses |  | (49,247)
Balance, ending | $ 385,207 | 385,207
Carrying amount of goodwill |  |
Balance at the beginning of the period | 385,207 |
Acquisitions | 38,281 |
Foreign currency translation | 700 |
Balance at the end of the period | 424,188 |
Engineered Support Structures Segment |  |
Goodwill |  |
Gross balance, beginning |  | 204,735
Accumulated impairment losses |  | (18,670)
Balance, ending | 186,065 | 186,065
Carrying amount of goodwill |  |
Balance at the beginning of the period | 186,065 |
Acquisitions | 18,677 |
Foreign currency translation | 431 |
Balance at the end of the period | 205,173 |
Utility Support Structures Segment |  |
Goodwill |  |
Gross balance, beginning |  | 123,618
Accumulated impairment losses |  | (14,355)
Balance, ending | 109,263 | 109,263
Carrying amount of goodwill |  |
Balance at the beginning of the period | 109,263 |
Acquisitions | 7,889 |
Foreign currency translation | (170) |
Balance at the end of the period | 116,982 |
Coatings Segment |  |
Goodwill |  |
Gross balance, beginning |  | 80,937
Accumulated impairment losses |  | (16,222)
Balance, ending | 64,715 | 64,715
Carrying amount of goodwill |  |
Balance at the beginning of the period | 64,715 |
Acquisitions | 11,715 |
Foreign currency translation | 370 |
Balance at the end of the period | 76,800 |
Irrigation Segment |  |
Goodwill |  |
Gross balance, beginning |  | 25,164
Accumulated impairment losses |  | 0
Balance, ending | 25,164 | $ 25,164
Carrying amount of goodwill |  |
Balance at the beginning of the period | 25,164 |
Acquisitions | 0 |
Foreign currency translation | 69 |
Balance at the end of the period | $ 25,233 |

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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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- Definition Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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