SEGMENTS - Revenues and Net Operating Income for Reportable Segments (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) segment	Sep. 30, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			1
Segment revenues and net operating income [Abstract]
Revenue	$ 65,438	$ 50,413	$ 188,868	$ 143,717
Property operating expenses, including real estate taxes	27,329	20,350	79,418	58,351
Net operating income	38,109	30,063	109,450	85,366
Property management	(2,563)	(2,203)	(7,537)	(6,055)
Casualty gain (loss)	(276)	10	(1,256)	(64)
Depreciation and amortization	(23,720)	(22,447)	(79,489)	(61,747)
General and administrative expenses	(4,519)	(4,279)	(14,240)	(11,982)
Gain (loss) on sale of real estate and other investments	0	0	27	26,840
Interest expense	(7,871)	(7,302)	(23,147)	(21,622)
Interest and other income (loss)	70	(5,082)	1,116	(4,032)
Net income (loss)	(770)	(11,240)	(15,076)	6,704
Multifamily
Segment revenues and net operating income [Abstract]
Revenue	64,404	49,088	186,002	138,287
Property operating expenses, including real estate taxes	27,009	20,066	78,539	55,907
Net operating income	37,395	29,022	107,463	82,380
All Other
Segment revenues and net operating income [Abstract]
Revenue	1,034	1,325	2,866	5,430
Property operating expenses, including real estate taxes	320	284	879	2,444
Net operating income	$ 714	$ 1,041	$ 1,987	$ 2,986