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AFS Securities - Amortized Cost and Fair Value of AFS Securities by Contractual Maturity (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract]    
Due in One Year or Less $ 173,213  
After One Year But Within Five Years 68,504  
After Five Years But Within Ten Years 28,198  
After Ten Years 22,739  
Securities with Variable Monthly Payments or Noncontractual Maturities 231,880  
Total 524,534 $ 515,516
Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]    
Due in One Year or Less 170,246  
After One Year But Within Five Years 66,903  
After Five Years But Within Ten Years 26,153  
After Ten Years 21,268  
Securities with Variable Monthly Payments or Noncontractual Maturities 227,400  
Total 511,970 489,029
U.S. Treasury    
Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract]    
Due in One Year or Less 160,417  
After One Year But Within Five Years 50,045  
After Five Years But Within Ten Years 0  
After Ten Years 0  
Securities with Variable Monthly Payments or Noncontractual Maturities 0  
Total 210,462 230,807
Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]    
Total 206,041 220,571
States and political subdivisions    
Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract]    
Due in One Year or Less 12,796  
After One Year But Within Five Years 18,459  
After Five Years But Within Ten Years 20,048  
After Ten Years 22,739  
Securities with Variable Monthly Payments or Noncontractual Maturities 0  
Total 74,042 81,135
Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]    
Total 71,102 76,568
Auction Rate Money Market Preferred    
Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract]    
Due in One Year or Less 0  
After One Year But Within Five Years 0  
After Five Years But Within Ten Years 0  
After Ten Years 0  
Securities with Variable Monthly Payments or Noncontractual Maturities 3,200  
Total 3,200 3,200
Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]    
Total 2,790 3,044
Mortgage-backed securities    
Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract]    
Due in One Year or Less 0  
After One Year But Within Five Years 0  
After Five Years But Within Ten Years 0  
After Ten Years 0  
Securities with Variable Monthly Payments or Noncontractual Maturities 24,696  
Total 24,696 29,068
Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]    
Total 23,397 26,886
Collateralized mortgage obligations    
Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract]    
Due in One Year or Less 0  
After One Year But Within Five Years 0  
After Five Years But Within Ten Years 0  
After Ten Years 0  
Securities with Variable Monthly Payments or Noncontractual Maturities 203,984  
Total 203,984 163,156
Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]    
Total 201,213 154,674
Corporate    
Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract]    
Due in One Year or Less 0  
After One Year But Within Five Years 0  
After Five Years But Within Ten Years 8,150  
After Ten Years 0  
Securities with Variable Monthly Payments or Noncontractual Maturities 0  
Total 8,150 8,150
Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]    
Total $ 7,427 $ 7,286