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Loans Payable, Senior Notes and Mortgage Company Loan Facility Senior Notes Payable (Details Textual 4)
$ in Thousands
3 Months Ended
Apr. 30, 2017
USD ($)
debtissuances
Mar. 10, 2017
USD ($)
Oct. 31, 2016
USD ($)
Senior Note Payable (Textual) [Abstract]      
Number of issuances of senior debt | debtissuances 9    
Proceeds from Issuance of Senior Long-term Debt $ 2,993,882   $ 2,694,372
Senior Notes [Member]      
Senior Note Payable (Textual) [Abstract]      
Debt Instrument, Face Amount 3,007,000    
4.875% Senior Notes Due 2027 [Member]      
Senior Note Payable (Textual) [Abstract]      
Debt Instrument, Face Amount 300,000    
Proceeds from Issuance of Senior Long-term Debt $ 300,000 $ 300,000  
Debt Instrument, Interest Rate, Stated Percentage 4.875% 4.875%  
Proceeds from Debt, Net of Issuance Costs $ 297,200