DEBT - Schedule of Debt (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($) apartmentCommunity	Dec. 31, 2022 USD ($) apartmentCommunity
Debt Instrument [Line Items]
Total debt	$ 921,659	$ 1,011,777
Weighted average interest rate	3.71%	3.62%
Weighted average maturity (in years)	6 years 21 days
Mortgages
Debt Instrument [Line Items]
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 11 months 26 days
Mortgages payable - other | Mortgages
Debt Instrument [Line Items]
Total debt	$ 279,340	$ 299,427
Weighted average interest rate	3.85%	3.85%
Weighted average maturity (in years)	5 years 1 month 2 days
Unsecured Debt
Debt Instrument [Line Items]
Total debt	$ 443,469	$ 513,500
Weighted average maturity (in years)	6 years 6 months 3 days
Unsecured Debt | Line of Credit
Debt Instrument [Line Items]
Total debt	$ 143,469	113,500
Weighted average maturity (in years)	2 years
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)	8 years 3 days
Unsecured Debt | Medium-term Notes
Debt Instrument [Line Items]
Total debt	$ 0	$ 100,000
Weighted average interest rate	0.00%	5.57%
Unsecured Debt | Primary Line Of Credit | Line of Credit
Debt Instrument [Line Items]
Weighted average interest rate	6.39%	4.12%