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Long-term investments - Schedule of Long-Term Investments (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Schedule of Equity Method Investments [Line Items] |  |
Investments carried at fair value | $ 2,058 | $ 1,054,665
San Antonio Water System and other | 27,586 | 27,417
Long-term investments | 65,699 | 140,097
Regulated Services Group |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity-method investees | 38,113 | 112,680
Atlantica |  |
Schedule of Equity Method Investments [Line Items] |  |
Investments carried at fair value | 0 | 1,052,703
Other |  |
Schedule of Equity Method Investments [Line Items] |  |
Investments carried at fair value | $ 2,058 | $ 1,962

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