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INVESTMENTS IN AND ADVANCES TO UNCONSOLIDATED AFFILIATES - Schedule of Share of Income (Loss) From Unconsolidated Affiliates (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Schedule Of Equity Method Investments [Line Items]    
Loss from unconsolidated affiliates $ (46,838) $ (25,579)
CityCenter    
Schedule Of Equity Method Investments [Line Items]    
Loss from unconsolidated affiliates 0 (2,831)
MGP BREIT Venture    
Schedule Of Equity Method Investments [Line Items]    
Loss from unconsolidated affiliates 38,936 38,962
BetMGM    
Schedule Of Equity Method Investments [Line Items]    
Loss from unconsolidated affiliates (91,993) (59,236)
Other    
Schedule Of Equity Method Investments [Line Items]    
Loss from unconsolidated affiliates $ 6,219 $ (2,474)