Fair Value Disclosures (Level 4 debt fv) (Details 4) - USD ($) $ in Thousands	Oct. 31, 2017	Oct. 31, 2016
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	$ 3,385,364	$ 3,923,561
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	2,626,131	2,843,177
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	639,088	870,384
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	120,145	210,000
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	3,229,137	3,790,185
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	2,469,876	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	639,116	872,809
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	$ 120,145	$ 210,000