Mortgages payable and credit line (Schedule of Principal Amounts Due) (Details) $ in Thousands	Oct. 31, 2018 USD ($)
Debt Disclosure [Abstract]
2019	$ 48,440	[1],[2]
2020	3,727
2021	141,018	[3]
2022	17,388
2023	$ 36,878

[1] Excludes $12.3 million attributable to Station Place assuming amendment of loan document.

[2] Two loans approximating $39.5 million are extendable for a period of one (1) year.

[3] Includes Rotunda loan in the amount of approximately $118.5 million refinanced with Aareal Capital Corporation on February 7, 2018. (See Note 5(M))