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DIVESTITURES - Pre-tax loss (Details) - Valmont SM, Offshore Wind Business [Member] - USD ($) $ in Thousands | 12 Months Ended
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Dec. 30, 2023 | Dec. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Pre-tax loss from divestitures, before recognition of currency translation loss | $ 12,123 | $ 12,123
Recognition of cumulative currency translation loss and hedges (out of OCI) | (21,150) | $ (21,150)
Net pre-tax loss from divestiture of offshore wind business | $ 33,273 |

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