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Borrowings - Narrative (Details)
 1 Months Ended 12 Months Ended
Jun. 30, 2021
USD ($)
Dec. 31, 2024
USD ($)
line_of_credit
Dec. 31, 2023
USD ($)
line_of_credit
Dec. 31, 2007
USD ($)
security
Debt Instrument [Line Items]        
Federal home loan balance   $ 250,000,000.0    
Loans pledged   2,100,000,000 $ 1,800,000,000  
Remaining borrowing capacity   1,200,000,000 993,800,000  
Advances from federal home loan banks   0 0  
Naming applicable municipalities as beneficiaries   157,700,000 155,700,000  
Unamortized debt issuance costs   $ 400,000 $ 700,000  
Unsecured Debt        
Debt Instrument [Line Items]        
Number of unsecured lines of credit issued | line_of_credit   1 1  
Pledge on certain loan amount   $ 10,000,000 $ 10,000,000  
Line of credit, outstanding amount   $ 0 $ 0  
Subordinated Debt        
Debt Instrument [Line Items]        
Number of preferred trust securities | security       2
Floating rate trust preferred securities       $ 10,000,000.0
Effective percentage   6.17% 7.20%  
Trust preferred securities, interest payment deferment period   5 years    
Subordinated Debt | LIBOR        
Debt Instrument [Line Items]        
Line of credit, basis spread on variable rate   1.55%    
Subordinated Debt | SOFR        
Debt Instrument [Line Items]        
Line of credit, basis spread on variable rate   1.55%    
Credit spread adjustment (percent)   0.26161%    
Notes Maturing In June 2031 | Subordinated Debt        
Debt Instrument [Line Items]        
Floating rate trust preferred securities $ 85,000,000.0      
Interest rate, percentage 3.25%      
Proceeds from issuance of subordinated long-term debt $ 83,500,000      
Notes Maturing In June 2031 | Subordinated Debt | SOFR        
Debt Instrument [Line Items]        
Line of credit, basis spread on variable rate 2.58%      
Federal Reserve Borrower In Custody Program | Federal Reserve Bank Advances        
Debt Instrument [Line Items]        
Federal home loan balance   $ 211,000,000    
Federal Reserve Borrower In Custody Program | Federal Reserve Bank Advances | Qualifying loans pledged as collateral        
Debt Instrument [Line Items]        
Loans pledged   209,000,000    
Federal Reserve Borrower In Custody Program | Federal Reserve Bank Advances | Securities pledged as collateral        
Debt Instrument [Line Items]        
Loans pledged   $ 77,900,000    
Line of Credit | Unsecured Debt | SOFR        
Debt Instrument [Line Items]        
Line of credit, basis spread on variable rate   2.85%    
Line of Credit | Overnight Borrowing Agreements        
Debt Instrument [Line Items]        
Line of credit, outstanding amount   $ 0 $ 0