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Securities (Details 2) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | $ 140,278 | $ 506,824
Unrealized Losses, Less Than 12 Months | (8,909) | (80,411)
Fair Value, 12 Months or Longer | 1,053,436 | 728,881
Unrealized Losses, 12 Months or Longer | (311,523) | (186,354)
Fair Value, Total | 1,193,714 | 1,235,705
Unrealized Losses, Total | (320,432) | (266,765)
U.S. Treasury and U.S. government sponsored entities |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 5,381 | 52,311
Unrealized Losses, Less Than 12 Months | (174) | (5,835)
Fair Value, 12 Months or Longer | 115,930 | 75,685
Unrealized Losses, 12 Months or Longer | (23,910) | (15,781)
Fair Value, Total | 121,311 | 127,996
Unrealized Losses, Total | (24,084) | (21,616)
State and political subdivisions |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 94,185 | 306,709
Unrealized Losses, Less Than 12 Months | (7,325) | (56,650)
Fair Value, 12 Months or Longer | 396,362 | 191,584
Unrealized Losses, 12 Months or Longer | (140,080) | (65,241)
Fair Value, Total | 490,547 | 498,293
Unrealized Losses, Total | (147,405) | (121,891)
Corporate bonds |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 11,962 | 2,893
Unrealized Losses, Less Than 12 Months | (429) | (122)
Fair Value, 12 Months or Longer | 3,804 | 986
Unrealized Losses, 12 Months or Longer | (264) | (180)
Fair Value, Total | 15,766 | 3,879
Unrealized Losses, Total | (693) | (302)
Mortgage-backed securities - residential |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 5,170 | 101,476
Unrealized Losses, Less Than 12 Months | (179) | (13,545)
Fair Value, 12 Months or Longer | 489,871 | 453,233
Unrealized Losses, 12 Months or Longer | (141,426) | (104,109)
Fair Value, Total | 495,041 | 554,709
Unrealized Losses, Total | (141,605) | (117,654)
Collateralized mortgage obligations |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 23,580 | 42,140
Unrealized Losses, Less Than 12 Months | (802) | (4,137)
Fair Value, 12 Months or Longer | 44,524 | 5,214
Unrealized Losses, 12 Months or Longer | (5,474) | (800)
Fair Value, Total | 68,104 | 47,354
Unrealized Losses, Total | (6,276) | (4,937)
Small Business Administration |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 0 | 1,295
Unrealized Losses, Less Than 12 Months | 0 | (122)
Fair Value, 12 Months or Longer | 2,945 | 2,179
Unrealized Losses, 12 Months or Longer | (369) | (243)
Fair Value, Total | 2,945 | 3,474
Unrealized Losses, Total | $ (369) | $ (365)

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