COMMITMENTS AND CONTINGENCIES (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) apartmentProperty apartment_community numberOfApartmentHomes	Dec. 31, 2020 USD ($)
Real Estate Properties [Line Items]
Number of properties | apartment_community	79
Redemption basis	1
Number of consecutive trading days for valuation	10 days
Aggregate redemption value of units of operating partnership owned by limited partners | $	$ 90.9	$ 69.0
Subject to Restrictions on Taxable Dispositions
Real Estate Properties [Line Items]
Number of properties | apartmentProperty	34
Number of apartment homes (approximately) | numberOfApartmentHomes	6,511