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Fair Value Disclosures (Level 4 debt fv) (Details 4) - USD ($)
$ in Thousands
Jan. 31, 2019
Oct. 31, 2018
Reported Value Measurement [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt Instrument, Fair Value Disclosure $ 3,597,634 $ 3,707,991
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 1,003,623 688,115
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 74,135 150,000
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 2,519,876 2,869,876
Estimate of Fair Value Measurement [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt Instrument, Fair Value Disclosure 3,567,636 3,617,244
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 1,002,014 687,974
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 74,135 150,000
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 $ 2,491,487 $ 2,779,270