Commitments and Contingencies (Details 1) - Loan Origination Commitments [Member] - USD ($) $ in Thousands	Jul. 31, 2020	Oct. 31, 2019
Company's mortgage commitments
Unused Commitments to Extend Credit	$ 2,384,226	$ 1,930,606
Investor commitments to purchase	807,041	774,225
Interest Rate Lock Commitments [Member]
Company's mortgage commitments
Unused Commitments to Extend Credit	655,587	565,634
Investor commitments to purchase	655,587	565,634
Non Interest Rate Lock Commitments [Member]
Company's mortgage commitments
Unused Commitments to Extend Credit	1,728,639	1,364,972
Mortgage Receivable [Member]
Company's mortgage commitments
Investor commitments to purchase	$ 151,454	$ 208,591