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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenues (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 26, 2021 | Jun. 27, 2020 | Jun. 26, 2021 | Jun. 27, 2020 | Dec. 26, 2020
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | $ 894,629 | $ 688,808 | $ 1,669,515 | $ 1,363,008 |
Contract assets | 140,146 |  | 140,146 |  | $ 123,495
Contract liabilities | 252,676 |  | 252,676 |  | 170,919
Contract liabilities, current | 156,481 |  | 156,481 |  | $ 130,018
Revenue recognized from contract liability | 31,267 | 21,037 | 69,369 | 39,277 |
Remaining performance obligations | $ 200,283 |  | $ 200,283 |  |
Minimum |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Remaining performance obligations, expected timing of satisfaction period | 12 months |  | 12 months |  |
Maximum |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Remaining performance obligations, expected timing of satisfaction period | 24 months |  | 24 months |  |
Contract Liabilities |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Contract liabilities, current | $ 156,481 |  | $ 156,481 |  |
Other Noncurrent Liabilities |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Contract liabilities, noncurrent | 96,195 |  | 96,195 |  |
Transferred at Point in Time |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | 621,636 | 449,101 | 1,138,004 | 894,236 |
Transferred over Time |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | 272,993 | 239,707 | 531,511 | 468,772 |
Utility Support Structures Segment |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | 267,863 | 228,473 | 520,561 | 451,421 |
Utility Support Structures Segment | Transferred at Point in Time |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | 9,127 | 4,619 | 15,421 | 13,543 |
Utility Support Structures Segment | Transferred over Time |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | 258,736 | 223,854 | 505,140 | 437,878 |
Engineered Support Structures Segment |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | 269,340 | 248,873 | 491,496 | 476,239 |
Engineered Support Structures Segment | Transferred at Point in Time |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | 260,001 | 236,827 | 473,847 | 452,706 |
Engineered Support Structures Segment | Transferred over Time |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | 9,339 | 12,046 | 17,649 | 23,533 |
Coatings Segment |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | 77,605 | 62,667 | 149,196 | 131,257 |
Coatings Segment | Transferred at Point in Time |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | 77,605 | 62,667 | 149,196 | 131,257 |
Coatings Segment | Transferred over Time |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | 0 | 0 | 0 | 0 |
Irrigation Segment |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | 279,821 | 148,795 | 508,262 | 304,091 |
Irrigation Segment | Transferred at Point in Time |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | 274,903 | 144,988 | 499,540 | 296,730 |
Irrigation Segment | Transferred over Time |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | $ 4,918 | $ 3,807 | $ 8,722 | $ 7,361 |

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