SCHEDULE IV - MORTGAGE LOANS ON REAL ESTATE (Details) - USD ($) $ in Thousands		12 Months Ended
		Oct. 31, 2018		Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2018
Mortgage Loans on Business Properties [Abstract]
Remaining face amount of mortgages	[1],[2],[3]					$ 0
Carrying amount of mortgage		$ 0	[1],[3],[4]	$ 13,500	$ 13,500	$ 0	[1],[3],[4]
Reconciliation of Mortgage Loans on Real Estate [Roll Forward]
Balance at beginning of period		0		13,500	0
Additions during period [Abstract]
New mortgage loans		0		0	13,500
Deductions during the current period [Abstract]
Collections of principal and amortization of discounts		0		(13,500)	0
Balance at end of period		$ 0	[1],[3],[4]	$ 0	$ 13,500
First Mortgage Loans on Business Properties [Member] | Retail Property [Member]
Mortgage Loans on Business Properties [Abstract]
Description	[1],[3]					uba:RocklandCountyNYMember
Coupon interest rate	[1],[3]	3.779%
Effective interest rate	[1],[3]	3.779%
Final maturity date	[1],[3]	Oct. 10, 2017
Periodic payment terms	[1],[3]	Interest Only - Monthly
Remaining face amount of mortgages	[1],[2],[3]					$ 0
Carrying amount of mortgage	[1],[3],[4]	$ 0				$ 0
Deductions during the current period [Abstract]
Balance at end of period	[1],[3],[4]	$ 0
First Mortgage Loans on Business Properties [Member] | Retail Property [Member] | LIBOR [Member]
Mortgage Loans on Business Properties [Abstract]
Reference rate reset period		1 month
Basis spread on variable rate		3.25%

[1] At October 31, 2018, no mortgage loans were delinquent in payment of currently due principal or interest.

[2] The aggregate cost basis for Federal income tax purposes is equal to the face amount of the mortgages

[3] There are no prior liens for any of the mortgage loans on real estate.

[4] Reconciliation of Mortgage Loans on Real Estate