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Investment Securities (Narrative) (Details)
$ in Thousands
1 Months Ended 9 Months Ended
Mar. 31, 2020
security
Sep. 30, 2020
USD ($)
security
Dec. 31, 2019
USD ($)
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]      
Number of securities transferred from held-to-maturity to available-for-sale | security 4    
Investment in Federal Home Loan and Atlantic Central Bankers Bank stock recorded at cost   $ 1,400 $ 5,300
Investment securities pledged as collateral   $ 0 0
Book value     84,387
Fair value     83,002
Number of securities with impairment that is other-than-temporary | security   0  
Single Issuers [Member]      
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]      
Number of single issuer trust preferred securities | security   1  
Book value   $ 10,000  
Fair value   $ 6,200 $ 7,152