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Investments in Affiliates and Other Entities (Tables) | 3 Months Ended
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Mar. 31, 2026
Investments [Abstract] |
Schedule of Equity Investments | The following table presents Quanta’s equity investments by type (in thousands):
|  | March 31, 2026 |  | December 31, 2025
Equity method investments - integral unconsolidated affiliates |  | $ | 267,436 |  |  | $ | 265,094 |
Equity method investments - non-integral unconsolidated affiliates |  | 83,167 |  |  | 76,134 |
Non-marketable equity securities |  | 55,931 |  |  | 70,453 |
Total equity investments |  | $ | 406,534 |  |  | $ | 411,681 |

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