Investments in Unconsolidated Entities - Summarized Operating Data With Reconciliation To Income From Unconsolidated Entities (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Schedule Of Equity Method Investments [Line Items]
Net income	$ 318,332	$ (52,784)	$ (898,818)	$ (102,880)
Income from unconsolidated entities			38,605	$ 0
BREIT MGP JV [Member]
Schedule Of Equity Method Investments [Line Items]
Net income	50,847		77,479
Income from unconsolidated entities	25,336		38,605
BREIT MGP JV [Member] | BREIT's Share [Member]
Schedule Of Equity Method Investments [Line Items]
Income from unconsolidated entities	25,373		38,662
BREIT MGP JV [Member] | BREIT Outside Basis [Member]
Schedule Of Equity Method Investments [Line Items]
Income from unconsolidated entities	(37)		(57)
BREIT MGP JV [Member] | MGM Growth Properties LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Income from unconsolidated entities	25,474		38,817
BREIT MGP JV [Member] | Rental [Member]
Schedule Of Equity Method Investments [Line Items]
Total revenue	$ 98,681		$ 149,118