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Commitments and Contingencies (Details 1) - Loan Origination Commitments [Member] - USD ($)
$ in Thousands
Jul. 31, 2019
Oct. 31, 2018
Company's mortgage commitments    
Unused Commitments to Extend Credit $ 2,089,524 $ 1,943,929
Investor commitments to purchase 929,290 777,463
Interest Rate Lock Commitments [Member]    
Company's mortgage commitments    
Unused Commitments to Extend Credit 769,631 614,255
Investor commitments to purchase 769,631 614,255
Non Interest Rate Lock Commitments [Member]    
Company's mortgage commitments    
Unused Commitments to Extend Credit 1,319,893 1,329,674
Mortgage Receivable [Member]    
Company's mortgage commitments    
Investor commitments to purchase $ 159,659 $ 163,208