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Investments in and Advances to Unconsolidated Affiliates - Schedule of Share of Income (Loss) From Unconsolidated Affiliates (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Schedule Of Equity Method Investments [Line Items]      
Income from unconsolidated affiliates $ 84,823 $ 42,938 $ 119,521
City Center      
Schedule Of Equity Method Investments [Line Items]      
Income from unconsolidated affiliates 128,127 (29,753) 128,421
MGP BREIT Venture      
Schedule Of Equity Method Investments [Line Items]      
Income from unconsolidated affiliates 155,817 136,755 0
BetMGM      
Schedule Of Equity Method Investments [Line Items]      
Income from unconsolidated affiliates (211,182) (61,663) (15,804)
Other      
Schedule Of Equity Method Investments [Line Items]      
Income from unconsolidated affiliates $ 12,061 $ (2,401) $ 6,904