Segment Information - Additional Information (Details)	3 Months Ended
	Mar. 31, 2021 Community State Segment
Segment Reporting Information [Line Items]
Number of owned or owned interests of apartment communities | Community	299
Number of States in which Entity Operates | State	16
Number of reportable segments | Segment	2
Period properties owned and stabilized	12 months
Occupancy level for Stabilized Communities	90.00%
Period Properties Stabilized	90 days
Same Store [Member]
Segment Reporting Information [Line Items]
Period properties owned and stabilized	12 months