Fair Value Disclosures (Level 4 debt fv) (Details 4) - USD ($) $ in Thousands	Jan. 31, 2016	Oct. 31, 2015
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	$ 616,464	$ 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	63,907	100,000
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
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	616,213	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	63,907	100,000
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	2,799,841	2,877,039
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	3,387,747	3,809,078
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	$ 3,479,961	$ 3,978,405