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Investment Securities - Securities in a Gross Unrealized Loss Position - Available-for-sale Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Available-for-Sale, Fair Value |  |
Fair Value, 12 Months or Longer | $ 144,649 | $ 169,993
Fair Value | 144,649 | 169,993
Gross Unrealized Losses |  |
Gross Unrealized Losses, 12 Months or Longer | (11,777) | (15,697)
Gross Unrealized Losses | (11,777) | (15,697)
U.S. Treasuries |  |
Available-for-Sale, Fair Value |  |
Fair Value, 12 Months or Longer | 30,004 | 42,977
Fair Value | 30,004 | 42,977
Gross Unrealized Losses |  |
Gross Unrealized Losses, 12 Months or Longer | (888) | (1,816)
Gross Unrealized Losses | (888) | (1,816)
U.S. government and federal agencies |  |
Available-for-Sale, Fair Value |  |
Fair Value, 12 Months or Longer | 13,621 | 13,275
Fair Value | 13,621 | 13,275
Gross Unrealized Losses |  |
Gross Unrealized Losses, 12 Months or Longer | (318) | (575)
Gross Unrealized Losses | (318) | (575)
Corporate bonds |  |
Available-for-Sale, Fair Value |  |
Fair Value, 12 Months or Longer | 2,655 | 2,523
Fair Value | 2,655 | 2,523
Gross Unrealized Losses |  |
Gross Unrealized Losses, 12 Months or Longer | (345) | (477)
Gross Unrealized Losses | (345) | (477)
U.S. agency collateralized mortgage obligations |  |
Available-for-Sale, Fair Value |  |
Fair Value, 12 Months or Longer | 32,906 | 34,310
Fair Value | 32,906 | 34,310
Gross Unrealized Losses |  |
Gross Unrealized Losses, 12 Months or Longer | (5,602) | (6,496)
Gross Unrealized Losses | (5,602) | (6,496)
Tax-exempt municipal |  |
Available-for-Sale, Fair Value |  |
Fair Value, 12 Months or Longer | 1,221 | 1,231
Fair Value | 1,221 | 1,231
Gross Unrealized Losses |  |
Gross Unrealized Losses, 12 Months or Longer | (158) | (149)
Gross Unrealized Losses | (158) | (149)
Taxable municipal |  |
Available-for-Sale, Fair Value |  |
Fair Value, 12 Months or Longer | 261 | 587
Fair Value | 261 | 587
Gross Unrealized Losses |  |
Gross Unrealized Losses, 12 Months or Longer | (9) | (19)
Gross Unrealized Losses | (9) | (19)
U.S. agency mortgage-backed |  |
Available-for-Sale, Fair Value |  |
Fair Value, 12 Months or Longer | 63,981 | 75,090
Fair Value | 63,981 | 75,090
Gross Unrealized Losses |  |
Gross Unrealized Losses, 12 Months or Longer | (4,457) | (6,165)
Gross Unrealized Losses | $ (4,457) | $ (6,165)

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