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Investments In and Advances to Equity Method Investees - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
(Gain) loss from equity method investees | $ (4,879) | $ (25,143) | $ (12,662) | $ (24,731) |
Equity Method Investee | Services Agreements |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Income from long-term services agreement | $ 2,300 | $ 71,400 | $ 8,600 | $ 131,300 |
Minimum |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Economic interest percentage | 4.00% |  | 4.00% |  | 4.00%
Voting interest percentage | 25.00% |  | 25.00% |  |
Maximum |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Economic interest percentage | 39.00% |  | 39.00% |  | 38.00%
Voting interest percentage | 40.00% |  | 40.00% |  |

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