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AFS Securities - Amortized Cost and Fair Value of AFS Securities, with Gross Unrealized Gains and Losses (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 507,689 $ 515,516
Gross Unrealized Gains 1,194 9
Gross Unrealized Losses 11,092 26,496
AFS securities, at fair value 497,791 489,029
U.S. Treasury    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 200,327 230,807
Gross Unrealized Gains 0 0
Gross Unrealized Losses 2,793 10,236
AFS securities, at fair value 197,534 220,571
States and political subdivisions    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 71,857 81,135
Gross Unrealized Gains 45 9
Gross Unrealized Losses 2,697 4,576
AFS securities, at fair value 69,205 76,568
Auction rate money market preferred    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 3,200 3,200
Gross Unrealized Gains 0 0
Gross Unrealized Losses 787 156
AFS securities, at fair value 2,413 3,044
Mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 23,373 29,068
Gross Unrealized Gains 0 0
Gross Unrealized Losses 1,121 2,182
AFS securities, at fair value 22,252 26,886
Collateralized mortgage obligations    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 202,482 163,156
Gross Unrealized Gains 1,149 0
Gross Unrealized Losses 3,165 8,482
AFS securities, at fair value 200,466 154,674
Corporate    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 6,450 8,150
Gross Unrealized Gains 0 0
Gross Unrealized Losses 529 864
AFS securities, at fair value $ 5,921 $ 7,286