Real Estate - Summary of Acquisition (Detail) ft² in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($) ft² a Property	Jun. 30, 2019 USD ($) ft² a Property	Jun. 30, 2020 USD ($) ft² a Property	Jun. 30, 2019 USD ($) ft² a Property
Business Acquisition [Line Items]
Number of operating properties | Property	1	1	138	13
Square feet | ft²	20	36	20,276	1,003
Acquisition cost of net investments in real estate | $	$ 147,893	$ 204,935	$ 2,541,660	$ 517,187
Acquisitions of Properties from Third Parties [Member] | Land [Member]
Business Acquisition [Line Items]
Acres of land | a	188	277	455	465