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Loans And Leases - Additional Information (Details) - USD ($)
 9 Months Ended 12 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Jun. 30, 2025
Sep. 30, 2024
Jun. 30, 2024
Dec. 31, 2023
Debt Securities Heldtomaturity Allowance For Credit Loss [Line Items]            
Loans and Leases Receivable, Related Parties, Ending Balance $ 22,900,000 $ 11,400,000        
Loans and Leases Receivable, Related Parties, Additions 11,500,000 1,400,000        
Loans and Leases Receivable, Related Parties, Proceeds 0 1,400,000        
Decrease to retained earnings 104,238,000 98,624,000 $ 101,892,000 $ 98,491,000 $ 93,836,000 $ 90,593,000
Minimum commitment required for evaluating idividually     500,000      
Commitment required for evaluating individually at management discretion     500,000      
Loans and leases, allowance for credit losses 10,700,000 10,184,000   10,116,000   10,507,000
Retained Earnings [Member]            
Debt Securities Heldtomaturity Allowance For Credit Loss [Line Items]            
Decrease to retained earnings 119,520,000 116,865,000 $ 117,988,000 $ 115,551,000 $ 113,615,000 $ 109,959,000
LHFI [Member]            
Debt Securities Heldtomaturity Allowance For Credit Loss [Line Items]            
Accrued interest receivable $ 3,200,000 $ 2,800,000        
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Interest Receivable Interest Receivable        
Allowance for credit loss $ 0 $ 0        
Reserve for Unfunded Commitments [Member]            
Debt Securities Heldtomaturity Allowance For Credit Loss [Line Items]            
Loans and leases, allowance for credit losses $ 400,000 $ 400,000        
Real Estate [Member]            
Debt Securities Heldtomaturity Allowance For Credit Loss [Line Items]            
Percentage of Loan Portfolio 49.60% 56.40%        
Pledged as Collateral [Member] | FHLB Borrowings [Member]            
Debt Securities Heldtomaturity Allowance For Credit Loss [Line Items]            
Loans pledged as collateral $ 86,500,000 $ 92,600,000        
Pledged as Collateral [Member] | Federal Reserve Bank Advances [Member]            
Debt Securities Heldtomaturity Allowance For Credit Loss [Line Items]            
Loans pledged as collateral $ 363,900,000 $ 285,200,000