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Loans Receivable (Details 4) - USD ($)
$ in Thousands
Sep. 30, 2019
Jun. 30, 2019
Residential real estate:    
Nonaccrual $ 5,869 $ 6,232
Loans Past Due Over 90 Days Still Accruing 1,615 1,796
Commercial and industrial [Member]    
Residential real estate:    
Nonaccrual 1 1
Loans Past Due Over 90 Days Still Accruing
One-to four-family residential real estate [Member]    
Residential real estate:    
Nonaccrual 4,145 4,545
Loans Past Due Over 90 Days Still Accruing 1,607 1,747
Multi-family [Member]    
Residential real estate:    
Nonaccrual 681 685
Loans Past Due Over 90 Days Still Accruing
Farm [Member]    
Residential real estate:    
Nonaccrual 310 309
Loans Past Due Over 90 Days Still Accruing
Nonresidential real estate and land [Member]    
Residential real estate:    
Nonaccrual 727 683
Loans Past Due Over 90 Days Still Accruing 49
Consumer [Member]    
Residential real estate:    
Nonaccrual 5 9
Loans Past Due Over 90 Days Still Accruing