Organization, Basis of Presentation and Significant Accounting Policies (Details) ft² in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020 USD ($) residential_condominium ft² home community state	Sep. 30, 2020 USD ($) ft² home residential_condominium community state
Real Estate Properties [Line Items]
Number of operating apartment communities | community	275	275
Number of apartment homes included in operating apartment communities owned	80,292	80,292
Number of states where operating apartment communities owned are located | state	11	11
Number of Communities with Apartments under Reconstruction	1	1
Number of Apartment Homes under Reconstruction	344	344
Number of owned communities under construction | community	19	19
Expected number of apartment homes under construction	6,384	6,384
Number of Residential Condominium Units Sold | residential_condominium	7	59
Communities under development rights | community	27	27
Estimated number of apartment homes in communities to be developed	9,320	9,320
Accounts Receivable, Credit Loss Expense (Reversal) | $	$ 18,755	$ 43,034
The Park Loggia [Member]
Real Estate Properties [Line Items]
Number Of Residential Condominium Units	172	172
Commercial Square Feet | ft²	67	67
Percent of Commercial Square Feet Leased	64.00%	64.00%