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AFS Securities - Amortized Cost and Fair Value of AFS Securities by Contractual Maturity (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
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Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract] |  |
Due in One Year or Less | $ 203,331 |
After One Year But Within Five Years | 27,338 |
After Five Years But Within Ten Years | 26,447 |
After Ten Years | 21,518 |
Securities with Variable Monthly Payments or Noncontractual Maturities | 229,055 |
Amortized Cost | 507,689 | $ 515,516
Debt Securities, Available-for-Sale, Maturity, Fair Value, Rolling Maturity [Abstract] |  |
Fair Value, Due in One Year or Less | 200,813 |
Fair Value, After One Year But Within Five Years | 26,931 |
Fair Value, After Five Years But Within Ten Years | 24,735 |
Fair Value, After Ten Years | 20,181 |
Fair Value, Securities with Variable Monthly Payments or Noncontractual Maturities | 225,131 |
Fair Value, Total | 497,791 | 489,029
U.S. Treasury |  |
Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract] |  |
Due in One Year or Less | 190,389 |
After One Year But Within Five Years | 9,938 |
After Five Years But Within Ten Years | 0 |
After Ten Years | 0 |
Securities with Variable Monthly Payments or Noncontractual Maturities | 0 |
Amortized Cost | 200,327 | 230,807
Debt Securities, Available-for-Sale, Maturity, Fair Value, Rolling Maturity [Abstract] |  |
Fair Value, Total | 197,534 | 220,571
States and political subdivisions |  |
Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract] |  |
Due in One Year or Less | 12,942 |
After One Year But Within Five Years | 17,400 |
After Five Years But Within Ten Years | 19,997 |
After Ten Years | 21,518 |
Securities with Variable Monthly Payments or Noncontractual Maturities | 0 |
Amortized Cost | 71,857 | 81,135
Debt Securities, Available-for-Sale, Maturity, Fair Value, Rolling Maturity [Abstract] |  |
Fair Value, Total | 69,205 | 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 |
Amortized Cost | 3,200 | 3,200
Debt Securities, Available-for-Sale, Maturity, Fair Value, Rolling Maturity [Abstract] |  |
Fair Value, Total | 2,413 | 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 | 23,373 |
Amortized Cost | 23,373 | 29,068
Debt Securities, Available-for-Sale, Maturity, Fair Value, Rolling Maturity [Abstract] |  |
Fair Value, Total | 22,252 | 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 | 202,482 |
Amortized Cost | 202,482 | 163,156
Debt Securities, Available-for-Sale, Maturity, Fair Value, Rolling Maturity [Abstract] |  |
Fair Value, Total | 200,466 | 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 | 6,450 |
After Ten Years | 0 |
Securities with Variable Monthly Payments or Noncontractual Maturities | 0 |
Amortized Cost | 6,450 | 8,150
Debt Securities, Available-for-Sale, Maturity, Fair Value, Rolling Maturity [Abstract] |  |
Fair Value, Total | $ 5,921 | $ 7,286

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