Business Segments (Details Textual)	9 Months Ended
	Sep. 30, 2021 ApartmentHome Property Segment	Oct. 31, 2021 Multi_family_apartment	Sep. 30, 2020 ApartmentHome
Business Segments (Textual) [Abstract]
Number of reportable segments | Segment	2
Number of apartment homes in apartment communities	58	1,748	219
Wholly And Partially Owned Consolidated Properties [Member] | Same Store [Member]
Business Segments (Textual) [Abstract]
Number of owned and managed apartment communities in segments | Property	92
Number of apartment homes in apartment communities | ApartmentHome	25,427
Wholly And Partially Owned Consolidated Properties [Member] | Other Real Estate [Member]
Business Segments (Textual) [Abstract]
Number of owned and managed apartment communities in segments | Property	3
Number of apartment homes in apartment communities | ApartmentHome	937