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Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Subsequent Event |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Government Grant Income | $ 3,000 |  |  |
Government Assistance C A R E S Act |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Government Grant Income |  | $ 32,913 | $ 0 | $ 0
Government Assistance C A R E S Act | Other nonoperating income (expense) |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Government Grant Income |  | 16,198 | 0 | 0
Government Assistance C A R E S Act | Equity income (loss) from unconsolidated joint ventures |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Government Grant Income |  | 1,279 | 0 | 0
Government Assistance C A R E S Act | Income (loss) From Discontinued Operations |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Government Grant Income |  | $ 15,436 | $ 0 | $ 0

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