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Other Income - Net (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Jul. 31, 2017
Jul. 31, 2016
Jul. 31, 2017
Jul. 31, 2016
Jul. 31, 2015
Oct. 31, 2016
Schedule of Equity Method Investments [Line Items]            
Income from Ancillary Businesses, net $ 3,709 $ 4,139 $ 10,555 $ 11,559    
Land Sales 4,633 64,109 151,470 77,701    
Rental Property Joint Ventures Metro Washington, D.C. [Member]            
Schedule of Equity Method Investments [Line Items]            
Retail Land Sales, Installment Method, Gross Profit, Deferred $ 2,607 $ 2,607   $ 2,999
Retail Land Sales, Installment Method, Gross Profit, Deferred, Percentage     50.00%      
Home Building Joint Venture Metro New York Four [Member]            
Schedule of Equity Method Investments [Line Items]            
Land Sales     $ 143,300      
Equity Method Investment, Ownership Percentage 20.00%   20.00%      
Home Building Joint Venture Metro New York Three [Member]            
Schedule of Equity Method Investments [Line Items]            
Equity Method Investment, Ownership Percentage   25.00%   25.00%    
Retail Land Sales, Installment Method, Gross Profit, Deferred         $ 9,300  
Security Monitoring Business [Member]            
Schedule of Equity Method Investments [Line Items]            
Income from Ancillary Businesses, net       $ 1,600    
Co-venturer [Member] | Rental Property Joint Ventures Metro Washington, D.C. [Member]            
Schedule of Equity Method Investments [Line Items]            
Land Sales   $ 20,200        
Equity Method Investment, Ownership Percentage   50.00%   50.00%