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Fair Value of Financial Assets and Liabilities, Estimated Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Financial assets [Abstract]    
Debt securities available-for-sale $ 1,037,965 $ 1,055,728
Equity securities at fair value 3,961 3,781
Federal Reserve Bank stock 4,887 4,887
Carrying Amount [Member]    
Financial assets [Abstract]    
Cash and cash equivalents 507,624 369,505
Certificates of deposit in other banks 245 245
Debt securities available-for-sale 1,037,965 1,055,728
Equity securities at fair value 3,961 3,781
Loans held for sale 483 184
Loans, net 4,734,780 4,431,669
Federal Home Loan Bank stock 5,061 5,062
Federal Reserve Bank stock 4,887 4,887
Accrued interest receivable 25,132 24,758
Financial liabilities [Abstract]    
Deposits 5,385,461 5,070,189
Repurchase agreements 284,863 240,166
Federal funds purchased 500 500
Advances from Federal Home Loan Bank 298 314
Long-term debt 63,843 64,016
Accrued interest payable 19,190 8,378
Unrecognized financial instruments [Abstract]    
Letters of credit 0 0
Commitments to extend credit 0 0
Forward sale commitments 0 0
Fair Value [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Financial assets [Abstract]    
Cash and cash equivalents 507,624 369,505
Certificates of deposit in other banks 0 0
Debt securities available-for-sale 0 328,569
Equity securities at fair value 0 0
Loans held for sale 492 188
Loans, net 0 0
Federal Home Loan Bank stock 0 0
Federal Reserve Bank stock 0 0
Accrued interest receivable 0 0
Financial liabilities [Abstract]    
Deposits 1,248,573 1,242,676
Repurchase agreements 0 0
Federal funds purchased 0 0
Advances from Federal Home Loan Bank 0 0
Long-term debt 0 0
Accrued interest payable 0 0
Unrecognized financial instruments [Abstract]    
Letters of credit 0 0
Commitments to extend credit 0 0
Forward sale commitments 0 0
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Financial assets [Abstract]    
Cash and cash equivalents 0 0
Certificates of deposit in other banks 245 245
Debt securities available-for-sale 1,037,965 727,159
Equity securities at fair value 0 0
Loans held for sale 0 0
Loans, net 0 0
Federal Home Loan Bank stock 5,061 5,062
Federal Reserve Bank stock 4,887 4,887
Accrued interest receivable 25,132 24,758
Financial liabilities [Abstract]    
Deposits 3,938,237 3,598,253
Repurchase agreements 0 0
Federal funds purchased 500 500
Advances from Federal Home Loan Bank 310 322
Long-term debt 0 0
Accrued interest payable 19,190 8,378
Unrecognized financial instruments [Abstract]    
Letters of credit 0 0
Commitments to extend credit 0 0
Forward sale commitments 0 0
Fair Value [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Financial assets [Abstract]    
Cash and cash equivalents 0 0
Certificates of deposit in other banks 0 0
Debt securities available-for-sale 0 0
Equity securities at fair value 3,961 3,781
Loans held for sale 0 0
Loans, net 4,733,747 4,166,636
Federal Home Loan Bank stock 0 0
Federal Reserve Bank stock 0 0
Accrued interest receivable 0 0
Financial liabilities [Abstract]    
Deposits 0 0
Repurchase agreements 284,826 240,213
Federal funds purchased 0 0
Advances from Federal Home Loan Bank 0 0
Long-term debt 54,687 52,394
Accrued interest payable 0 0
Unrecognized financial instruments [Abstract]    
Letters of credit 0 0
Commitments to extend credit 0 0
Forward sale commitments $ 0 $ 0