Commitments and Contingencies (Details 1) - Loan Origination Commitments [Member] - USD ($) $ in Thousands	Jan. 31, 2021	Oct. 31, 2020
Company's mortgage commitments
Unused Commitments to Extend Credit	$ 2,801,531	$ 2,069,917
Investor commitments to purchase	638,331	598,992
Interest Rate Lock Commitments [Member]
Company's mortgage commitments
Unused Commitments to Extend Credit	521,022	381,116
Investor commitments to purchase	521,022	381,116
Non Interest Rate Lock Commitments [Member]
Company's mortgage commitments
Unused Commitments to Extend Credit	2,280,509	1,688,801
Mortgage Receivable [Member]
Company's mortgage commitments
Investor commitments to purchase	$ 117,309	$ 217,876