Investment in Unconsolidated Ventures - Income Statement Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues:
Total revenues	$ 6,924	$ 7,130
Expenses:
Real estate operating expenses	3,058	3,176
Interest expense	1,860	1,946
Depreciation	1,561	1,547
Total expenses	9,846	9,213
Total revenues less total expenses	(2,922)	(2,083)
Net income from joint ventures	(4,831)	(4,247)
Unconsolidated joint ventures
Revenues:
Rental and other revenue	30,843	26,827
Total revenues	30,843	26,827
Expenses:
Real estate operating expenses	14,532	13,096
Interest expense	8,757	7,906
Depreciation	10,357	9,189
Total expenses	33,646	30,191
Total revenues less total expenses	(2,803)	(3,364)
Net income from joint ventures	(2,803)	(3,364)
BRT equity in loss from joint ventures	$ (1,815)	$ (2,068)