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v3.25.4

Related Parties - Narrative (Details) - USD ($) $ in Thousands |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Aug. 11, 2025 | Jul. 08, 2025 | Apr. 22, 2024 | Dec. 28, 2025 | Dec. 29, 2024 | Dec. 31, 2023 | Nov. 30, 2021
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Accounts receivable, net |  |  |  | $ 314,665 | $ 281,441 |  |
Contract assets |  |  |  | 395,126 | 238,169 | $ 269,808 |
Contract liabilities |  |  |  | 50,510 | 24,975 | 43,694 |
Selling, general and administrative expenses |  |  |  | 126,464 | 107,247 | 110,344 |
Total revenue |  |  |  | $ 2,982,781 | 2,637,229 | 2,899,276 |
Drum Parent LLC | Members Of Management Of Riggs Distler & Company, Inc. |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Percentage owned by noncontrolling owner |  |  |  |  |  |  | 1.42%
Drum Parent LLC | Employees Of Riggs Distler & Company, Inc. |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Percentage owned by noncontrolling owner |  |  |  | 0.80% |  |  |
Related Party |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Accounts receivable, net |  |  |  | $ 11,852 | 9,648 |  |
Contract assets |  |  |  | 657 | 2,623 |  |
Selling, general and administrative expenses |  |  |  |  | 500 | 1,300 |
Taxes payable |  |  |  | 0 | 600 |  |
Total revenue |  |  |  | 97,588 | 106,835 | $ 116,431 |
Chief Executive Officer and Member of Board |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Accounts receivable, net |  |  |  |  | 26,500 |  |
Contract assets |  |  |  |  | 26,000 |  |
Contract liabilities |  |  |  |  | 0 |  |
Total revenue |  |  |  |  | $ 143,700 |  |
Chief Executive Officer and Member of Board | Contract Assets | Customer Concentration Risk |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  | 11.00% |  |
Southwest Gas Corporation | Related Party |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Accounts receivable, net |  |  |  | 11,900 | $ 9,600 |  |
Contract assets |  |  |  | 700 | 2,600 |  |
Contract liabilities |  |  |  | $ 0 | $ 0 |  |
Southwest Gas Corporation | Related Party | Accounts Receivable | Customer Concentration Risk |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Concentration risk percentage |  |  |  | 4.00% | 3.00% |  |
Southwest Gas Holdings |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Percentage of ownership after sale of stock | 31.00% | 52.00% | 81.00% |  |  |  |

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