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Investment Securities (Narrative) (Details)
3 Months Ended
Mar. 31, 2020
USD ($)
security
Dec. 31, 2019
USD ($)
security
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]    
Investment in Federal Home Loan and Atlantic Central Bankers Bank stock recorded at cost $ 1,100,000 $ 5,300,000
Investment securities pledged as collateral 0 $ 0
Number of securities | security   1
Book value $ 84,387,000
Fair value $ 83,002,000
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  
Number of securities | security   1
Book value $ 10,000,000  
Fair value $ 5,200,000 $ 7,152,000