Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
	Jan. 25, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule Of Significant Accounting Policies [Line Items]
Consolidation percentage if not wholly owned but controlled										less than 100% of the equity
Percentage of occupancy for stabilization										90.00%
Period after completion of construction for commencement of depreciation										1 year
Estimated useful lives										40 years
Weighted average lease term period										64 months
Depreciation commencement description										Depreciation on development buildings commences when the asset is ready for its intended use, which we define as the earlier of stabilization (90% occupied) or one year after completion of construction.
Threshold percentage to recognize gain or loss on transactions in consolidated entities		100.00%								100.00%
Percentage of taxable income distribute										100.00%
Deferred rental payment		$ 23,000								$ 23,000
Rental		$ 987,810	$ 980,148	$ 944,366	$ 878,807	$ 723,857	$ 710,465	$ 700,689	$ 696,807	$ 3,791,131	$ 2,831,818	$ 2,388,791
Subsequent Event [Member]
Schedule Of Significant Accounting Policies [Line Items]
Percentage of rental payments due collected	98.00%
Rental	$ 16,000
Other Assets [Member]
Schedule Of Significant Accounting Policies [Line Items]
Capitalized cost												$ 21,200
Maximum [Member]
Schedule Of Significant Accounting Policies [Line Items]
Percentage of rental payments deferred		1.00%								1.00%
Capital Improvements [Member] | Minimum [Member]
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful lives										5 years
Capital Improvements [Member] | Maximum [Member]
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful lives										7 years
Standard Tenant Improvements [Member]
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful lives										10 years
Depreciable and Land Improvements [Member] | Minimum [Member]
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful lives										15 years
Depreciable and Land Improvements [Member] | Maximum [Member]
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful lives										25 years
Operating Properties [Member] | Minimum [Member]
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful lives										25 years
Operating Properties [Member] | Maximum [Member]
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful lives										35 years