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GOODWILL AND INTANGIBLE ASSETS - Carrying Amount of Goodwill by Segment (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 25, 2021 | Dec. 26, 2020
Goodwill |  |
Gross balance, beginning |  | $ 492,144
Accumulated impairment losses |  | (61,822)
Balance, ending | $ 709,462 | 430,322
Carrying amount of goodwill |  |
Balance at the beginning of the period | 430,322 |
Acquisitions | 280,659 |
Foreign currency translation | (1,519) |
Balance at the end of the period | 709,462 |
Engineered Support Structures Segment |  |
Goodwill |  |
Gross balance, beginning |  | 232,323
Accumulated impairment losses |  | (31,245)
Balance, ending | 201,248 | 201,078
Carrying amount of goodwill |  |
Balance at the beginning of the period | 201,078 |
Acquisitions | 0 |
Foreign currency translation | 170 |
Balance at the end of the period | 201,248 |
Utility Support Structures Segment |  |
Goodwill |  |
Gross balance, beginning |  | 135,335
Accumulated impairment losses |  | (14,355)
Balance, ending | 119,249 | 120,980
Carrying amount of goodwill |  |
Balance at the beginning of the period | 120,980 |
Acquisitions | 0 |
Foreign currency translation | (1,731) |
Balance at the end of the period | 119,249 |
Coatings Segment |  |
Goodwill |  |
Gross balance, beginning |  | 94,309
Accumulated impairment losses |  | (16,222)
Balance, ending | 78,216 | 78,087
Carrying amount of goodwill |  |
Balance at the beginning of the period | 78,087 |
Acquisitions | 0 |
Foreign currency translation | 129 |
Balance at the end of the period | 78,216 |
Irrigation Segment |  |
Goodwill |  |
Gross balance, beginning |  | 30,177
Accumulated impairment losses |  | 0
Balance, ending | 310,749 | $ 30,177
Carrying amount of goodwill |  |
Balance at the beginning of the period | 30,177 |
Acquisitions | 280,659 |
Foreign currency translation | (87) |
Balance at the end of the period | $ 310,749 |

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- Definition Amount after 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 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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