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Subsequent Events (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Jan. 02, 2025
USD ($)
$ / shares
shares
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Subsequent Event [Line Items]        
Assets   $ 5,805,138 $ 5,714,506  
Loans   4,115,259 4,098,094  
Marketable Securities   1,139,284 1,190,780  
Liabilities   5,273,907 5,219,442  
Deposits   4,633,167 4,597,360  
Total short-term borrowings   500,621 485,607  
Merger and acquisition costs   1,159 $ 0 $ 0
Equity issuance costs   246    
Northway Financial        
Subsequent Event [Line Items]        
Merger and acquisition costs   1,200    
Equity issuance costs   246    
Debt Securities, Available-for-Sale, Sold at Par Value   $ 56,400    
Northway Financial | Subsequent Event [Member]        
Subsequent Event [Line Items]        
Stockholders' Equity Note, Stock Split, Conversion Ratio 0.83      
Business Combination, Consideration Transferred $ 96,500      
Sale of Stock, Price Per Share (in dollars per share) | $ / shares $ 42.25      
Sale of Stock, Number of Shares Issued in Transaction (in shares) | shares 2,300,000      
Common Stock, Shares Oustanding Percentage 14.00%      
Assets $ 7,000,000      
Loans 4,900,000      
Marketable Securities 1,400,000      
Liabilities 6,400,000      
Deposits 5,600,000      
Total short-term borrowings $ 676