SEGMENTS - Revenues and Net Operating Income for Reportable Segments (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) segment	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	1
Segment Reporting Information, Profit (Loss) [Abstract]
Revenue	$ 256,716	$ 201,705	$ 177,994
Property operating expenses, including real estate taxes	108,637	81,857	73,158
Net operating income	148,079	119,848	104,836
Property management expenses	(9,895)	(8,752)	(5,801)
Casualty loss	(1,591)	(344)	(1,662)
Depreciation and amortization	(105,257)	(92,165)	(75,593)
General and administrative expenses	(17,516)	(16,213)	(13,440)
Gain (loss) on sale of real estate and other investments	41	27,518	25,503
Interest expense	(32,750)	(29,078)	(27,525)
Interest and other income (loss)	1,248	(2,915)	(1,575)
Net income (loss)	(17,641)	(2,101)	4,743
Multifamily
Segment Reporting Information, Profit (Loss) [Abstract]
Revenue	252,950	195,624	164,126
Property operating expenses, including real estate taxes	107,431	79,096	66,356
Net operating income	145,519	116,528	97,770
All Other
Segment Reporting Information, Profit (Loss) [Abstract]
Revenue	3,766	6,081	13,868
Property operating expenses, including real estate taxes	1,206	2,761	6,802
Net operating income	$ 2,560	$ 3,320	$ 7,066