Summary of Significant Accounting Policies - Schedule of Gain on Sale of Real Estate (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Contributions to unconsolidated joint ventures
Gross proceeds		$ 18,700
Gain on sale of real estate, net		3,800
Dispositions to third parties
Gross proceeds	$ 60,400	29,500
Gain on sale of real estate, net	20,800	17,700
Total gains on contributions and dispositions, net	$ 20,800	$ 21,500