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BUSINESS COMBINATIONS - Goodwill (Details) - USD ($) $ in Thousands | Mar. 03, 2025 | Jan. 31, 2025 | Oct. 23, 2024 | Oct. 03, 2025 | Dec. 27, 2024
--- | --- | --- | --- | --- | ---
Business Combination, Goodwill |  |  |  |  |
Goodwill |  |  |  | $ 177,506 | $ 140,991
Alternative Power Generation, Inc. |  |  |  |  |
Business Combination, Goodwill |  |  |  |  |
Business acquisition, goodwill, expected tax deductible amount | $ 31,600 |  |  |  |
Goodwill | $ 31,613 |  |  |  |
Goodwill, Name of Segment | Energy |  |  |  |
Business Combination, Goodwill, Reporting Unit Assignment, Incomplete | false |  |  |  |
Alpha Inspections, Inc. |  |  |  |  |
Business Combination, Goodwill |  |  |  |  |
Business acquisition, goodwill, expected tax deductible amount |  | $ 4,900 |  |  |
Goodwill |  | $ 4,902 |  |  |
Goodwill, Name of Segment |  | Engineering and Consulting |  |  |
Business Combination, Goodwill, Reporting Unit Assignment, Incomplete |  | false |  |  |
Enica Engineering, PLLC |  |  |  |  |
Business Combination, Goodwill |  |  |  |  |
Business acquisition, goodwill, expected tax deductible amount |  |  | $ 9,800 |  |
Goodwill |  |  | $ 9,847 |  |
Goodwill, Name of Segment |  |  | Energy |  |
Business Combination, Goodwill, Reporting Unit Assignment, Incomplete |  |  | false |  |

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