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Fair Value of Assets and Liabilities (Narrative) (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2021
USD ($)
item
Dec. 31, 2020
USD ($)
loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired Financing Receivable, Recorded Investment $ 2,749 $ 2,662
Number of impaired loans, with related allowance | loan   6
Valuation allowance 38  
Loan [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 38  
Number of loans with related allowance | item 2  
Valuation allowance $ 38  
Amount recognized 652  
Impaired Loans [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 2,711 $ 2,662
Number of impaired loans not requiring a valuation allowance | item 5  
Impaired Loans, Cumulative Charge-Offs   $ 652