Significant Transactions - Summary of Apartment Community Dispositions (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) Property	Mar. 31, 2019 USD ($) Property apartment_home
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain on dispositions of real estate	$ (34)	$ 291,473
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Wholly And Partially Owned Consolidated Properties [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of apartment communities sold | Property	0	7
Number of apartment homes sold | apartment_home		2,206
Gain on dispositions of real estate		$ 291,473