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Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Jan. 01, 2019
Dec. 31, 2018
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]        
Percentage of minority interest 30.20%      
Total assets $ 31,146,921     $ 30,210,706
Total liabilities 19,829,718     19,638,665
Commissions, complimentaries and other incentives 602,000 $ 540,000    
Operating ROU assets 641,912   $ 656,000 0
Operating lease liabilities 573,897   $ 580,000  
Food and Beverage Revenue [Member]        
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]        
Lease revenue 12,000 13,000    
Entertainment Retail and Other Revenue [Member]        
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]        
Lease revenue $ 22,000 $ 21,000    
MGM Growth Properties LLC [Member]        
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]        
Percentage of minority interest 30.20%      
Total assets $ 12,300,000     11,000,000
Total liabilities $ 5,600,000     $ 5,100,000