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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 25, 2021 | Dec. 26, 2020 | Dec. 28, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net sales | $ 3,501,575 | $ 2,895,355 | $ 2,766,976
Contract assets | 142,643 | 123,495 |
Contract liabilities | 213,203 | 170,919 |
Contract liabilities, current | 135,746 | 130,018 |
Revenue recognized from contract liability | 105,406 | 74,319 |
Remaining performance obligation | 165,657 |  |
Contract Liabilities |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Contract liabilities, current | 135,746 |  |
Other Noncurrent Liabilities |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Contract liabilities, noncurrent | 77,457 |  |
Utility Support Structures |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net sales | 1,121,004 | 1,002,138 | 885,608
Engineered Support Structures |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net sales | 1,064,440 | 983,523 | 1,002,076
Coatings |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net sales |  | 269,602 | 300,640
Irrigation |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net sales | 1,017,050 | 640,092 | 578,652
Point in Time |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net sales | 2,384,575 | 1,921,328 | 1,865,064
Point in Time | Utility Support Structures |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net sales | 62,904 | 86,382 | 47,450
Point in Time | Engineered Support Structures |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net sales | 1,026,312 | 940,513 | 952,056
Point in Time | Coatings |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net sales | 299,081 | 269,602 | 300,640
Point in Time | Irrigation |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net sales | 996,278 | 624,831 | 564,918
Over Time |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net sales | 1,117,000 | 974,027 | 901,912
Over Time | Utility Support Structures |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net sales | 1,058,100 | 915,756 | 838,158
Over Time | Engineered Support Structures |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net sales | 38,128 | 43,010 | 50,020
Over Time | Coatings |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net sales | 0 | 0 | 0
Over Time | Irrigation |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net sales | $ 20,772 | $ 15,261 | $ 13,734
Minimum |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |
Expected timing of performance obligation satisfaction | 12 months |  |
Maximum |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |
Expected timing of performance obligation satisfaction | 24 months |  |

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