Investments in Real Estate - Schedule of Details of Properties Acquired (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($) ft² Property
Real Estate Properties [Line Items]
Number of Transactions	16
Number of Properties | Property	135
Purchase Price (in thousands) | $	$ 3,477,717
Multifamily Properties [Member]
Real Estate Properties [Line Items]
Number of Transactions	7
Number of Properties | Property	34
Sq. Feet | ft²	12,569,000
Purchase Price (in thousands) | $	$ 2,103,526
Industrial [Member]
Real Estate Properties [Line Items]
Number of Transactions	6
Number of Properties | Property	80
Sq. Feet | ft²	11,776,000
Purchase Price (in thousands) | $	$ 972,404
Retail [Member]
Real Estate Properties [Line Items]
Number of Transactions	1
Number of Properties | Property	6
Sq. Feet | ft²	689,000
Purchase Price (in thousands) | $	$ 287,392
Other Properties [Member]
Real Estate Properties [Line Items]
Number of Transactions	2
Number of Properties | Property	15
Sq. Feet | ft²	997,000
Purchase Price (in thousands) | $	$ 114,395