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Investment Securities (Narrative) (Details)
 3 Months Ended 12 Months Ended
Dec. 31, 2024
USD ($)
security
Dec. 31, 2024
USD ($)
security
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
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 $ 15,600,000 $ 15,600,000 $ 15,600,000  
Investment securities pledged as collateral 0 0 0  
Gross gains on sales of securities   0 0 $ 0
Gross losses on sales of securities   2,000 4,000 6,000
Provision for credit loss on security   0 10,000,000.0 0
Provision for credit loss $ 1,000,000.0 $ 1,000,000.0    
Number of securities with impairment that is other-than-temporary | security 0 0    
Charge-offs $ 9,000,000.0 $ 24,920,000 4,640,000 $ 1,461,000
Single Issuers [Member]        
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]        
Number of single issuer trust preferred securities | security   1    
Par value     10,000,000.0  
Provision for credit loss 1,000,000.0 $ 1,000,000.0 $ 10,000,000.0  
Charge-offs $ 9,000,000.0