DEBT - Schedule of Debt (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total debt	$ 870,963	$ 859,784
Weighted average maturity (in years)	7 years 1 month 20 days
Weighted average interest rate	3.29%	3.26%
Mortgages payable - Fannie Mae | Mortgages
Debt Instrument [Line Items]
Total debt	$ 198,850	$ 198,850
Weighted average maturity (in years)	9 years 6 months 21 days
Weighted average interest rate	2.78%	2.78%
Mortgages payable - other | Mortgages
Debt Instrument [Line Items]
Total debt	$ 326,113	$ 284,934
Weighted average maturity (in years)	6 years 8 months 15 days
Weighted average interest rate	3.85%	3.81%
Unsecured Debt
Debt Instrument [Line Items]
Total debt	$ 346,000	$ 376,000
Weighted average maturity (in years)	7 years 11 months 23 days
Unsecured Debt | Line of Credit
Debt Instrument [Line Items]
Total debt	$ 46,000	76,000
Weighted average maturity (in years)	3 years 9 months
Unsecured Debt | Unsecured senior notes
Debt Instrument [Line Items]
Total debt	$ 300,000	$ 300,000
Weighted average maturity (in years)	8 years 7 months 17 days
Weighted average interest rate	3.12%	3.12%
Unsecured Debt | Primary Line Of Credit | Line of Credit
Debt Instrument [Line Items]
Weighted average interest rate	2.56%	2.74%