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Loans Receivable and Allowance for Loan Losses, Summary of Loans Receivable (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
item
Dec. 31, 2019
USD ($)
Mar. 31, 2019
USD ($)
Summary of loans receivable [Abstract]      
Total loans receivable $ 638,659 $ 648,432 $ 677,115
Unearned loan fees (2,709) (2,747)  
Loans receivable 635,950 645,685  
Loans pledged as collateral 151,800    
Federal National Mortgage Association [Member]      
Summary of loans receivable [Abstract]      
Mortgage loans serviced 25,500 25,900  
Federal Home Loan Mortgage Corporation      
Summary of loans receivable [Abstract]      
Mortgage loans serviced 12,600 13,000  
Residential Mortgage [Member]      
Summary of loans receivable [Abstract]      
Total loans receivable $ 260,981 269,654 270,979
Loan to value ratio 80.00%    
Residential Mortgage [Member] | Minimum [Member]      
Summary of loans receivable [Abstract]      
Number of dwelling units | item 1    
Residential Mortgage [Member] | Maximum [Member]      
Summary of loans receivable [Abstract]      
Number of dwelling units | item 4    
Commercial [Member]      
Summary of loans receivable [Abstract]      
Total loans receivable $ 43,490 43,127 44,725
Commercial Real Estate [Member]      
Summary of loans receivable [Abstract]      
Total loans receivable 220,654 229,257 238,618
ADC [Member]      
Summary of loans receivable [Abstract]      
Total loans receivable 99,861 92,822 108,933
Home Equity/2nds [Member]      
Summary of loans receivable [Abstract]      
Total loans receivable $ 12,199 12,031 12,714
Home Equity/2nds [Member] | Minimum [Member]      
Summary of loans receivable [Abstract]      
Number of dwelling units | item 1    
Home Equity/2nds [Member] | Maximum [Member]      
Summary of loans receivable [Abstract]      
Number of dwelling units | item 4    
Consumer [Member]      
Summary of loans receivable [Abstract]      
Total loans receivable $ 1,474 $ 1,541 $ 1,146