Fair Value Disclosures (Level 4 debt fv) (Details 4) - USD ($) $ in Thousands	Oct. 31, 2016	Oct. 31, 2015
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	$ 3,923,561	$ 3,978,405
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Senior Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	2,843,177	2,877,039
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Loans Payable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	870,384	1,001,366
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Warehouse Agreement Borrowings [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	210,000	100,000
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	3,790,185	3,809,078
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Senior Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	2,707,376	2,707,376
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Loans Payable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	872,809	1,001,702
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Warehouse Agreement Borrowings [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	$ 210,000	$ 100,000