Investment in Unconsolidated Ventures - Income Statement Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues:
Rental and other revenue	$ 23,255	$ 14,683	$ 46,194	$ 26,113
Total revenues	23,318	14,685	46,257	26,119
Expenses:
Real estate operating expenses	10,548	6,348	20,982	11,101
Interest expense	5,513	2,912	10,996	4,933
Depreciation	7,543	5,010	15,551	8,616
Total expenses	27,452	17,803	55,432	31,816
Total revenues less total expenses	(4,134)	(3,118)	(9,175)	(5,697)
Gain on sale of real estate	0	0	0	6
Loss on extinguishment of debt	0	(563)	0	(563)
BRT's equity in earnings and equity in earnings from sale of unconsolidated joint venture properties	11,202	35,607	7,104	47,115
Unconsolidated Joint Ventures
Revenues:
Rental and other revenue	11,476	22,107	23,608	47,338
Total revenues	11,476	22,107	23,608	47,338
Expenses:
Real estate operating expenses	5,137	9,842	10,812	21,011
Interest expense	2,390	4,893	4,845	10,919
Depreciation	2,558	5,208	5,265	11,844
Total expenses	10,085	19,943	20,922	43,774
Total revenues less total expenses	1,391	2,164	2,686	3,564
Other equity earnings	0	22	113	77
Gain on insurance recoveries	0	52	65	567
Gain on sale of real estate	38,418	77,681	38,418	101,333
Loss on extinguishment of debt	(561)	(2,888)	(561)	(2,918)
Net income from joint ventures	39,248	77,031	40,721	102,623
BRT's equity in earnings and equity in earnings from sale of unconsolidated joint venture properties	$ 15,208	$ 40,048	$ 16,023	$ 54,239