DEBT - Schedule of Debt (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($) apartmentCommunity	Apr. 26, 2023	Dec. 31, 2022 USD ($) apartmentCommunity
Debt Instrument [Line Items]
Total debt	$ 842,559		$ 1,011,777
Weighted average interest rate	3.46%		3.62%
Weighted average maturity (in years)	6 years 11 months 15 days
Mortgages
Debt Instrument [Line Items]
Weighted average interest rate		5.04%
Number of real estate properties, serving as collateral for mortgage loans | apartmentCommunity	13		15
Mortgages payable - Fannie Mae | Mortgages
Debt Instrument [Line Items]
Total debt	$ 198,850		$ 198,850
Weighted average interest rate	2.78%		2.78%
Weighted average maturity (in years)	7 years 9 months 21 days
Mortgages payable - other | Mortgages
Debt Instrument [Line Items]
Total debt	$ 343,709		$ 299,427
Weighted average interest rate	4.14%		3.85%
Weighted average maturity (in years)	6 years 6 months 10 days
Unsecured Debt
Debt Instrument [Line Items]
Total debt	$ 300,000		$ 513,500
Weighted average maturity (in years)	6 years 10 months 17 days
Unsecured Debt | Line of Credit
Debt Instrument [Line Items]
Total debt	$ 0		113,500
Unsecured Debt | Term loans
Debt Instrument [Line Items]
Total debt	$ 0		$ 100,000
Weighted average interest rate	0.00%		5.57%
Unsecured Debt | Unsecured Senior Notes
Debt Instrument [Line Items]
Total debt	$ 300,000		$ 300,000
Weighted average interest rate	3.12%		3.12%
Weighted average maturity (in years)	6 years 10 months 17 days
Unsecured Debt | Primary Line Of Credit | Line of Credit
Debt Instrument [Line Items]
Weighted average interest rate	0.00%		4.12%