INVESTMENT IN UNCONSOLIDATED VENTURES - Income Statement Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Revenues:
Rental and other revenue	$ 23,365	$ 23,510	$ 23,255	$ 22,939	$ 22,711	$ 21,691	$ 14,683	$ 11,430	$ 93,069	$ 70,515
Total revenues	23,508	23,852	23,318	22,939	22,711	21,697	14,685	11,434	93,617	70,527
Expenses:
Real estate operating expenses	10,256	10,583	10,548	10,434	10,262	9,195	6,348	4,753	41,821	30,558
Interest expense	5,584	5,581	5,513	5,483	5,520	5,061	2,912	2,021	22,161	15,514
Depreciation	6,389	6,544	7,543	8,008	8,031	8,165	5,010	3,606	28,484	24,812
Total expenses	25,742	26,725	27,452	27,980	27,628	26,094	17,803	14,013	107,899	85,538
Total revenues less total expenses	(2,234)	(2,873)	(4,134)	(5,041)	(4,917)	(4,397)	(3,118)	(2,579)	(14,282)	(15,011)
Impairment of assets					0	0	0	0		0
Insurance recoveries	317	261	215	0	850	0	0	0	793	850
Gain on sale of real estate properties	0	604	0	0	0	0	0	6	604	6
Loss on extinguishment of debt					0	0	(563)	0	0	(563)
Net (loss) income attributable to common stockholders	$ (1,737)	$ (1,494)	$ 11,202	$ (4,098)	$ (4,219)	$ 7,059	$ 35,607	$ 11,508	3,873	49,955
Unconsolidated Joint Ventures
Revenues:
Rental and other revenue									44,785	72,873
Total revenues									44,785	72,873
Expenses:
Real estate operating expenses									20,577	33,086
Interest expense									9,268	16,269
Depreciation									10,403	17,798
Total expenses									40,248	67,153
Total revenues less total expenses									4,537	5,720
Other equity earnings									126	121
Impairment of assets									0	(8,553)
Insurance recoveries									0	8,553
Gain on insurance recoveries									65	567
Gain on sale of real estate properties									38,418	118,270
Loss on extinguishment of debt									(561)	(3,491)
Net (loss) income attributable to common stockholders									42,585	121,187
BRT equity in earnings and equity in earnings from sale of unconsolidated joint venture properties									$ 17,037	$ 66,426