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Investments in and Advances to Unconsolidated Affiliates - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Aug. 30, 2018 | Aug. 07, 2018
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Distributions from unconsolidated affiliates | $ 63,960 | $ 100,700 | $ 322,631 |  |
Other-than-temporary impairment charges | 64,000 |  |  |  |
CityCenter Holdings, LLC [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Distribution paid/declared | 101,000 | $ 180,000 | 625,000 |  |
MGP BREIT Venture [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Distributions from unconsolidated affiliates | $ 81,000 |  |  |  |
Percentage ownership interest | 50.10% | 50.10% |  |  |
Mandarin Oriental [Member] | CityCenter Holdings, LLC [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Consideration received from sale of discontinued operations |  |  |  | $ 214,000 |
Recognized gain on sale, unconsolidated affiliates and reversal of basis differences |  |  | 133,000 |  |
Mandarin Oriental [Member] | CityCenter Holdings LLC As Investee [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Recognized gain on sale, unconsolidated affiliates and reversal of basis differences |  |  | 12,000 |  |
CityCenter Holdings LLC As Investee [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Distributions from unconsolidated affiliates | $ 51,000 | $ 90,000 | $ 313,000 |  |
Distributions from unconsolidated affiliates, percentage | 50.00% | 50.00% | 50.00% |  |
Percentage ownership interest | 50.00% | 50.00% |  |  |
Grand Victoria [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Consideration received from sale of discontinued operations |  |  |  |  | $ 45,000
Percentage ownership interest |  |  |  |  | 50.00%
Grand Victoria [Member] | Cash [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Consideration received from sale of discontinued operations |  |  |  |  | $ 328,000

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