Investment in Unconsolidated Ventures - Income Statement Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues:
Rental and other revenue	$ 23,510	$ 21,691	$ 69,704	$ 47,804
Total revenues	23,852	21,697	70,109	47,816
Expenses:
Real estate operating expenses	10,583	9,195	31,565	20,296
Interest expense	5,581	5,061	16,577	9,994
Depreciation	6,544	8,165	22,095	16,781
Total expenses	26,725	26,094	82,157	57,910
Total revenues less total expenses	(2,873)	(4,397)	(12,048)	(10,094)
Gain on sale of real estate	604	0	604	6
Loss on extinguishment of debt	0	0	0	(563)
BRT's equity in earnings and equity in earnings from sale of unconsolidated joint venture properties	(1,494)	7,059	5,610	54,174
Unconsolidated Joint Ventures
Revenues:
Rental and other revenue	10,636	13,502	34,244	60,840
Total revenues	10,636	13,502	34,244	60,840
Expenses:
Real estate operating expenses	5,023	6,512	15,835	27,523
Interest expense	2,212	2,843	7,057	13,762
Depreciation	2,568	3,113	7,833	14,957
Total expenses	9,803	12,468	30,725	56,242
Total revenues less total expenses	833	1,034	3,519	4,598
Other equity earnings	3	12	119	89
Gain on insurance recoveries	0	0	65	567
Gain on sale of real estate	0	16,937	38,418	118,270
Loss on extinguishment of debt	0	(573)	(561)	(3,491)
Net income from joint ventures	836	17,410	41,560	120,033
BRT's equity in earnings and equity in earnings from sale of unconsolidated joint venture properties	$ 426	$ 11,607	$ 16,449	$ 65,846