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Summary of Significant Accounting Policies - Government Grant Income (Details) - Government Assistance, CARES Act - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Schedule of Equity Method Investments [Line Items] |  |  |  |
Government grant income | $ 2,448 | $ 0 | $ 17,332 | $ 0
Other Income (Expense) |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Government grant income | 2,153 | 0 | 16,233 | 0
Equity Income (Loss) From Unconsolidated Joint Ventures |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Government grant income | $ 295 | $ 0 | $ 1,099 | $ 0

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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