SEGMENT REPORTING - Revenues and Net Operating Income for Reportable Segments (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) segment	Mar. 31, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	1
Segment revenues and net operating income [Abstract]
Revenue	$ 60,314	$ 46,648
Property operating expenses, including real estate taxes	25,873	19,241
Net operating income	34,441	27,407
Property management	(2,253)	(1,767)
Casualty gain (loss)	(598)	(101)
Depreciation and amortization	(31,001)	(19,992)
General and administrative expenses	(4,500)	(3,906)
Interest expense	(7,715)	(7,231)
Interest and other income (loss)	1,063	431
Net income (loss)	(10,563)	(5,159)
Multifamily
Segment revenues and net operating income [Abstract]
Revenue	59,398	44,241
Property operating expenses, including real estate taxes	25,544	17,874
Net operating income	33,854	26,367
All Other
Segment revenues and net operating income [Abstract]
Revenue	916	2,407
Property operating expenses, including real estate taxes	329	1,367
Net operating income	$ 587	$ 1,040