Real Estate - Summary of Acquisition (Detail) ft² in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) ft² a Property	Sep. 30, 2019 USD ($) ft² a Property	Sep. 30, 2020 USD ($) ft² a Property	Sep. 30, 2019 USD ($) ft² a Property
Business Acquisition [Line Items]
Number of operating properties | Property	2	2	140	15
Square feet | ft²	194	80	20,470	1,083
Acquisition cost of net investments in real estate | $	$ 188,717	$ 184,077	$ 2,730,377	$ 701,264
Acquisitions of Properties from Third Parties [Member] | Land [Member]
Business Acquisition [Line Items]
Acres of land | a	156	186	611	651