Other Income - Net (Details 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017	Oct. 31, 2015
Revenues and expenses from land sales [Abstract]
Revenue	$ 38,218	$ 2,123	$ 45,186	$ 146,837
Expense	(31,797)	(1,932)	(38,065)	(146,205)
Income from land sales	2,587	1,527	3,287	5,086
Rental Property Joint Venture Metro Washington, D.C. Two [Member]
Revenues and expenses from land sales [Abstract]
Retail Land Sales, Installment Method, Gross Profit, Deferred	(3,834)		(3,834)
Income from land sales	1,000
Home Building Joint Venture Metro New York Three [Member]
Revenues and expenses from land sales [Abstract]
Retail Land Sales, Installment Method, Gross Profit, Deferred					$ (9,300)
Deferred gain recognized		$ 1,336		$ 4,454