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Investments in and Advances to Unconsolidated Affiliates - Summarized Income Statement Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Schedule Of Equity Method Investments [Line Items]      
Net revenues $ 5,162,082 $ 12,899,672 $ 11,763,096
Income (loss) from continuing operations (1,319,907) 2,214,380 583,894
Net income (loss) (1,032,724) 2,049,146 466,772
City Center and MGP BREIT Venture [Member]      
Schedule Of Equity Method Investments [Line Items]      
Net revenues 869,638 1,294,861 1,277,745
Income (loss) from continuing operations (43,749) 69,143 97,091
Net income (loss) $ (43,749) $ 69,143 $ (37,911)