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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