CONSOLIDATED JOINT VENTURES AND REDEEMABLE NONCONTROLLING INTERESTS (Details)	9 Months Ended		12 Months Ended
	Jul. 31, 2020 USD ($) Investment Property shares	Jul. 31, 2019 USD ($)	Oct. 31, 2019 USD ($)	Mar. 28, 2012
Business Acquisition [Line Items]
Number of real estate joint venture investments | Investment	5
Number of commercial real estate properties owned | Property	81
Redeemable non-controlling interests [Roll Forward]
Beginning Balance	$ 77,876,000	$ 78,258,000	$ 78,258,000
Change in Redemption Value	(14,176,000)	$ 1,800,000	4,452,000
Redemption Value of UB High Ridge non-controlling interest	(560,000)		(1,413,000)
Redemption Value of UB Dumont I, LLC non-controlling interest	0		(630,000)
uba_ Redemption Value Of UB New City, LLC Non Controlling Interest	(198,000)		(91,000)
Redemption Value of UB Ironbound, LP non-controlling interest	0		(2,700,000)
Ending Balance	$ 62,942,000		$ 77,876,000
UB Orangeburg, LLC [Member]
Business Acquisition [Line Items]
Ownership interest	44.60%			2.92%
Additional investment in consolidated joint venture	$ 6,800,000
UB Orangeburg, LLC [Member] | Class A Common Stock [Member]
Business Acquisition [Line Items]
Number of shares of common stock included in calculation of regular quarterly cash distribution equivalent to annual cash distribution to non-managing member of subsidiary (in shares) | shares	1
McLean Plaza Associates, LLC [Member]
Business Acquisition [Line Items]
Ownership interest	53.00%
Fixed annual distribution	5.05%
UB High Ridge, LLC [Member]
Business Acquisition [Line Items]
Number of commercial real estate properties owned | Property	3
Cost of acquisition	$ 5,500,000
Ownership interest	16.30%
Fixed annual distribution	5.50%
Additional investment in consolidated joint venture	$ 3,200,000
Additional Equity Contributed to Joint Venture	1,500,000
UB Dumont I, LLC [Member]
Business Acquisition [Line Items]
Cost of acquisition	$ 3,900,000
Ownership interest	36.40%
Fixed annual distribution	5.10%
Additional investment in consolidated joint venture	$ 630,000
UB New City I, LLC [Member]
Business Acquisition [Line Items]
Cost of acquisition	$ 2,400,000
Ownership interest	84.30%
Fixed annual distribution	5.00%
Additional investment in consolidated joint venture	$ 289,300