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Derivative Financial Instruments (Narrative Disclosures) (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Derivatives          
Accumulated Derivative Credit Valuation Adjustment $ 38,000   $ 38,000   $ 38,000
Unrealized gains on interest rate swaps 3,693,000 $ 2,175,000 2,131,000 $ 6,044,000  
Interest rate swap agreements on loans with third-party counter parties          
Derivatives          
Interest rate swaps - liabilities, fair value 1,800,000   1,800,000    
Interest rate swaps - assets, fair value 61,100,000   61,100,000    
Interest rate swap related to AFS securities | Designated as Hedging Instrument          
Derivatives          
Unrealized gains on interest rate swaps 107,000 426,000 (68,000) 376,000  
Gain recognized in income on ineffective portion of hedges 0 0 0 0  
Interest rate swap related to FHLB borrowings | Designated as Hedging Instrument          
Derivatives          
Unrealized gains on interest rate swaps 3,600,000 1,700,000 2,200,000 5,700,000  
Gain recognized in income on ineffective portion of hedges $ 0 $ 0 $ 0 $ 0