Real Estate - Summary of Acquisition (Detail) ft² in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) ft² a Property	Mar. 31, 2020 USD ($) ft² a Property
Business Acquisition [Line Items]
Number of operating properties | Property	1	137
Square feet | ft²	25	20,256
Acquisition cost of net investments in real estate | $	$ 229,050	$ 2,393,767
Acquisitions of Properties from Third Parties [Member] | Land [Member]
Business Acquisition [Line Items]
Acres of land | a	261	267