Business Segments (Details Textual)	12 Months Ended
	Dec. 31, 2020 Property apartment_home Segment	Sep. 08, 2020 apartment_home Multi_family_apartment
Business Segments (Textual) [Abstract]
Number of reportable segments | Segment	2
Number of owned and managed apartment communities in segments | Multi_family_apartment		12
Number of apartment homes in apartment communities		4,051
Wholly And Partially Owned Consolidated Properties | Same Store [Member]
Business Segments (Textual) [Abstract]
Number of owned and managed apartment communities in segments | Property	91
Number of apartment homes in apartment communities	25,201
Wholly And Partially Owned Consolidated Properties | Other Real Estate [Member]
Business Segments (Textual) [Abstract]
Number of owned and managed apartment communities in segments | Property	8
Number of apartment homes in apartment communities	1,391