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Long-term investments - Income from Long-term Investments (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Schedule of Equity Method Investments [Line Items] |  |  |  |
Fair value gain (loss) on investments | $ 27,342 | $ 309,842 | $ (44,402) | $ 119,084
Dividend and interest income from investments carried at fair value | 25,745 | 24,304 | 50,654 | 47,682
Equity method loss | (2,816) | (1,326) | (8,370) | (2,124)
Interest and other income | 10,235 | 1,989 | 12,117 | 7,506
Income from long-term investments | 60,506 | 334,809 | 9,999 | 172,148
Atlantica |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Fair value gain (loss) on investments | 28,888 | 305,606 | (35,545) | 120,212
Dividend and interest income from investments carried at fair value | 21,054 | 18,426 | 41,618 | 36,852
Atlantica Yield Energy Solutions Canada Inc. |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Fair value gain (loss) on investments | (1,948) | 2,897 | (9,259) | (1,245)
Dividend and interest income from investments carried at fair value | 4,376 | 4,813 | 8,721 | 8,717
Other |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Fair value gain (loss) on investments | 402 | 1,339 | 402 | 117
Dividend and interest income from investments carried at fair value | $ 315 | $ 1,065 | $ 315 | $ 2,113

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