Investment in Unconsolidated Ventures - Income Statement Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues:
Total revenues	$ 6,816	$ 7,287	$ 13,740	$ 14,417
Expenses:
Real estate operating expenses	3,004	3,325	6,062	6,501
Interest expense	1,809	2,049	3,669	3,995
Depreciation	1,809	1,428	3,370	2,975
Total expenses	9,579	9,283	19,425	18,496
Total revenues less total expenses	(2,763)	(1,996)	(5,685)	(4,079)
Consolidation of investment in limited partnership	31	44	63	78
BRT equity in loss from joint ventures	(4,246)	(4,317)	(9,077)	(8,564)
Unconsolidated joint ventures
Revenues:
Rental and other revenue	31,542	28,976	62,385	55,803
Total revenues	31,542	28,976	62,385	55,803
Expenses:
Real estate operating expenses	14,674	14,304	29,206	27,400
Interest expense	8,766	8,919	17,523	16,825
Depreciation	10,417	10,031	20,773	19,220
Total expenses	33,857	33,254	67,502	63,445
Gain on insurance recoveries	338	517	338	517
Total revenues less total expenses	(2,315)	(4,278)	(5,117)	(7,642)
Consolidation of investment in limited partnership	(1,977)	(3,761)	(4,779)	(7,125)
BRT equity in loss from joint ventures	$ (1,387)	$ (2,218)	$ (3,202)	$ (4,286)