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Loans Held For Investment (Detail Textuals) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2018
Jun. 30, 2018
Loan interest income added to negative amortization loan balance $ 0 $ 0
Fixed-rate loans as a percentage of total loans held for investment 2.00% 2.00%
First Trust Deed Loans    
Loans deemed uncollectible, period of delinquency 150 days  
Commercial Business or Second Trust Deed Loans    
Loans deemed uncollectible, period of delinquency 120 days  
Troubled Debt Restructurings    
Loans deemed uncollectible, period of delinquency 90 days  
Bankruptcy    
Loans deemed uncollectible, period of delinquency 60 days  
Maximum    
Segregated restructured loans, period of delinquency 90 days  
Maximum | Bankruptcy    
Allowance for loan losses, pooling method, period of delinquency 60 days