Unconsolidated Entities - Summary of Investments in and Advances to our Unconsolidated Entities (Detail) - USD ($) $ in Thousands		Mar. 31, 2020	Dec. 31, 2019
Schedule Of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated entities		$ 6,834,758	$ 6,237,371
Unconsolidated Co-Investment Ventures [Member]
Schedule Of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated entities		5,910,369	5,873,784
Other Ventures [Member]
Schedule Of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated entities	[1]	$ 924,389	$ 363,587

[1] In February 2020, we completed the Liberty Transaction and acquired an equity method investment in eight ventures