Organization, Basis of Presentation and Significant Accounting Policies (Details) ft² in Thousands	3 Months Ended
	Mar. 31, 2020 state community home residential_condominium ft²
Real Estate Properties [Line Items]
Number of operating apartment communities | community	277
Number of apartment homes included in operating apartment communities owned	80,398
Number of states where operating apartment communities owned are located | state	11
Number of owned communities under construction | community	19
Expected number of apartment homes under construction	6,198
Number of Residential Condominium Units Sold | residential_condominium	36
Communities under development rights | community	28
Estimated number of apartment homes in communities to be developed	9,720
The Park Loggia [Member]
Real Estate Properties [Line Items]
Number Of Residential Condominium Units	172
Retail Square Feet | ft²	67
Percent of Retail Square Feet Leased	64.00%