Interest rate swap contracts (Details) - USD ($)		3 Months Ended		12 Months Ended
	Dec. 26, 2012	Jan. 31, 2016	Jan. 31, 2015	Oct. 31, 2015
Amount drawn on loan		$ 315,673,000		$ 307,899,000
Unrealized loss on derivatives		698,000	$ (2,149,000)	1,581,000
Interest rate swap contract liabilities		1,764,000		1,066,000
Regency Swap [Member]
Interest rate swap contract liabilities		1,311,000		945,000
Damascus Centre Swap [Member]
Interest rate swap contract liabilities		453,000		121,000
Construction Loan [Member]
Refinanced loan amount	$ 15,000,000
Loan amount		25,000,000		$ 25,000,000
Amount drawn on loan		18,900,000
Notional amount of interest rate swap		$ 18,900,000
Fixed interest rate		3.81%
Mortgage Loans over $1,000,000 [Member]
Loan amount		$ 16,200,000
Notional amount of interest rate swap		$ 16,200,000
Fixed interest rate		3.75%
Basis points, interest rate		1.25%