CONSOLIDATED JOINT VENTURES AND REDEEMABLE NONCONTROLLING INTERESTS (Details) $ in Thousands	6 Months Ended		12 Months Ended
	Apr. 30, 2017 USD ($) Investment shares	Apr. 30, 2016 USD ($)	Oct. 31, 2016 USD ($)	Mar. 28, 2012
Business Acquisition [Line Items]
Number of real estate joint venture investments | Investment	4
Redeemable non-controlling interests [Roll Forward]
Beginning Balance	$ 18,253	$ 15,955	$ 15,955
Change in Redemption Value	(2,271)	$ 1,300	2,298
Initial Value of non-controlling interest for UB High Ridge investment	55,217		0
Ending Balance	$ 71,199		$ 18,253
UB Ironbound, LP ("Ironbound") [Member]
Business Acquisition [Line Items]
Ownership interest	84.00%
UB Orangeburg, LLC [Member]
Business Acquisition [Line Items]
Ownership interest	33.50%			2.92%
Additional investment in consolidated joint venture	$ 4,100
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]
Cost of acquisition	$ 5,500
Ownership interest	8.80%
Fixed annual distribution	5.46%