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Loans Held For Investment (Details 9) - USD ($)
Dec. 31, 2018
Jun. 30, 2018
Financing Receivable, Modifications [Line Items]    
Restructured loans on non-accrual status $ 2,745,000 $ 3,392,000
Restructured loans on accrual status 1,425,000 1,788,000
Restructured loans 4,170,000 5,180,000
Mortgage loans, Single-family    
Financing Receivable, Modifications [Line Items]    
Restructured loans on non-accrual status 2,698,000 3,328,000
Restructured loans on accrual status 1,425,000 1,788,000
Commercial business loans    
Financing Receivable, Modifications [Line Items]    
Restructured loans on non-accrual status 47,000 64,000
Substandard    
Financing Receivable, Modifications [Line Items]    
Restructured loans on non-accrual status 2,800,000 3,400,000
Substandard | Restructured loans on accrual status    
Financing Receivable, Modifications [Line Items]    
Restructured loans on accrual status $ 1,400,000 1,400,000
Special Mention | Restructured loans on accrual status    
Financing Receivable, Modifications [Line Items]    
Restructured loans on accrual status   $ 389,000