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Loan Commitments and Other Off-Balance Sheet Activities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Guarantor Obligations [Line Items]    
Duration of extension 60 days  
Commitments to extend credit [Member]    
Guarantor Obligations [Line Items]    
Notional Or Contractual Credit Extension Commitments $ 19,737 $ 75,180
Fixed-rate loan commitments 11,900  
Standby letters of credit [Member]    
Guarantor Obligations [Line Items]    
Notional Or Contractual Credit Extension Commitments 6,119 5,965
Unused lines of credit [Member]    
Guarantor Obligations [Line Items]    
Notional Or Contractual Credit Extension Commitments $ 149,771 $ 152,554
Minimum [Member] | Commitments to extend credit [Member]    
Guarantor Obligations [Line Items]    
Fixed interest rate 3.15%  
Maturity period 1 year  
Maximum [Member] | Commitments to extend credit [Member]    
Guarantor Obligations [Line Items]    
Fixed interest rate 5.25%  
Maturity period 30 years