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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