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Derivative Financial Instruments (Narrative Disclosures) (Details) - USD ($)
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Derivatives      
Accumulated Derivative Credit Valuation Adjustment $ 191,000   $ 191,000
Unrealized gains on interest rate swaps 3,869,000 $ 2,089,000  
Gain recognized in income on ineffective portion of hedges 0    
Interest rate swap agreements on loans with third-party counter parties      
Derivatives      
Interest rate swaps - liabilities, fair value 7,700,000    
Interest rate swaps - assets, fair value 24,900,000    
Interest rate swap related to FHLB borrowings | Designated as Hedging Instrument      
Derivatives      
Unrealized gains on interest rate swaps 3,900,000    
Interest rate swap related to AFS securities | Designated as Hedging Instrument      
Derivatives      
Unrealized gains on interest rate swaps $ 50,000