Commitments and Contingencies (Details 1) - Loan Origination Commitments [Member] - USD ($) $ in Thousands	Apr. 30, 2018	Oct. 31, 2017
Company's mortgage commitments
Unused Commitments to Extend Credit	$ 2,058,420	$ 1,497,612
Investor commitments to purchase	716,369	476,450
Interest Rate Lock Commitments [Member]
Company's mortgage commitments
Unused Commitments to Extend Credit	609,389	350,740
Investor commitments to purchase	609,389	350,740
Non Interest Rate Lock Commitments [Member]
Company's mortgage commitments
Unused Commitments to Extend Credit	1,449,031	1,146,872
Mortgage Receivable [Member]
Company's mortgage commitments
Investor commitments to purchase	$ 106,980	$ 125,710