Business Segments (Details Textual)	6 Months Ended
	Jun. 30, 2021 Property Segment ApartmentHome
Business Segments (Textual) [Abstract]
Number of reportable segments | Segment	2
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	4
Number of apartment homes in apartment communities | ApartmentHome	995