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Long-term investments - Schedule of Long-Term Investments (Detail) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Schedule of Equity Method Investments [Line Items] |  |
Investments carried at fair value | $ 1,929,128 | $ 1,839,212
Noncontrolling interest in partnerships and joint ventures | 264,251 | 186,452
Other | 30,807 | 5,219
Long-term investments | 303,020 | 214,583
Notes Receivable | Development loans |  |
Schedule of Equity Method Investments [Line Items] |  |
Development loans receivable from equity-method investees | 7,962 | 22,912
Atlantica |  |
Schedule of Equity Method Investments [Line Items] |  |
Investments carried at fair value | 1,822,400 | 1,706,900
Atlantica share subscription agreement |  |
Schedule of Equity Method Investments [Line Items] |  |
Investments carried at fair value | 0 | 20,015
Atlantica Yield Energy Solutions Canada Inc. |  |
Schedule of Equity Method Investments [Line Items] |  |
Investments carried at fair value | 104,229 | 110,514
Other |  |
Schedule of Equity Method Investments [Line Items] |  |
Investments carried at fair value | $ 2,499 | $ 1,783

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