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Investments in Affiliates and Other Entities (Tables) | 9 Months Ended
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Sep. 30, 2025
Investments [Abstract] |
Schedule of Equity Investments | The following table presents Quanta’s equity investments by type (in thousands):
|  | September 30, 2025 |  | December 31, 2024
Equity method investments - integral unconsolidated affiliates |  | $ | 262,032 |  |  | $ | 101,460 |
Equity method investments - non-integral unconsolidated affiliates |  | 85,090 |  |  | 77,617 |
Non-marketable equity securities |  | 70,354 |  |  | 62,539 |
Total equity investments |  | $ | 417,476 |  |  | $ | 241,616 |

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