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Securities (Details 3) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | $ 78,612 | $ 49,846
Unrealized Losses, Less Than 12 Months | (2,921) | (3,025)
Fair Value, 12 Months or Longer | 1,071,733 | 1,116,642
Unrealized Losses, 12 Months or Longer | (235,089) | (219,539)
Fair Value, Total | 1,150,345 | 1,166,488
Unrealized Losses, Total | (238,010) | (222,564)
U.S. Treasury and U.S. government sponsored entities |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 449 | 399
Unrealized Losses, Less Than 12 Months | (1) | (1)
Fair Value, 12 Months or Longer | 116,810 | 122,361
Unrealized Losses, 12 Months or Longer | (18,584) | (17,596)
Fair Value, Total | 117,259 | 122,760
Unrealized Losses, Total | (18,585) | (17,597)
State and political subdivisions |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 28,380 | 15,852
Unrealized Losses, Less Than 12 Months | (1,414) | (1,684)
Fair Value, 12 Months or Longer | 412,504 | 428,416
Unrealized Losses, 12 Months or Longer | (96,730) | (91,819)
Fair Value, Total | 440,884 | 444,268
Unrealized Losses, Total | (98,144) | (93,503)
Corporate bonds |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 8,059 | 8,463
Unrealized Losses, Less Than 12 Months | (275) | (284)
Fair Value, 12 Months or Longer | 4,869 | 3,881
Unrealized Losses, 12 Months or Longer | (182) | (182)
Fair Value, Total | 12,928 | 12,344
Unrealized Losses, Total | (457) | (466)
Mortgage-backed securities - residential |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 4,272 | 5,113
Unrealized Losses, Less Than 12 Months | (90) | (76)
Fair Value, 12 Months or Longer | 495,129 | 515,259
Unrealized Losses, 12 Months or Longer | (113,538) | (104,068)
Fair Value, Total | 499,401 | 520,372
Unrealized Losses, Total | (113,628) | (104,144)
Collateralized mortgage obligations |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 37,452 | 20,019
Unrealized Losses, Less Than 12 Months | (1,141) | (980)
Fair Value, 12 Months or Longer | 39,674 | 43,808
Unrealized Losses, 12 Months or Longer | (5,739) | (5,579)
Fair Value, Total | 77,126 | 63,827
Unrealized Losses, Total | (6,880) | (6,559)
Small Business Administration |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 0 | 0
Unrealized Losses, Less Than 12 Months | 0 | 0
Fair Value, 12 Months or Longer | 2,747 | 2,917
Unrealized Losses, 12 Months or Longer | (316) | (295)
Fair Value, Total | 2,747 | 2,917
Unrealized Losses, Total | $ (316) | $ (295)

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