ACQUISITIONS, DISPOSITIONS AND IMPAIRMENT CHARGES - Schedule of Property Dispositions (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) property_Unit property_unit
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
No. of Units | property_Unit	1,880
Non-Controlling Partner's Share of Gain on Sale	$ 894
Disposition of real estate properties
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
No. of Units | property_unit	385
Sales Price	$ 34,032
Gain on Sale	$ 10,618
Disposition of real estate properties | Houston, TX
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
No. of Units | property_unit	384
Sales Price	$ 33,200
Gain on Sale	9,938
Non-Controlling Partner's Share of Gain on Sale	$ 894
Disposition of real estate properties | New York, NY
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
No. of Units | property_unit	1
Sales Price	$ 832
Gain on Sale	680
Non-Controlling Partner's Share of Gain on Sale	$ 0