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Securities (Details 2) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | $ 35,764 | $ 506,824
Unrealized Losses, Less Than 12 Months | (827) | (80,411)
Fair Value, 12 Months or Longer | 1,181,195 | 728,881
Unrealized Losses, 12 Months or Longer | (226,707) | (186,354)
Fair Value, Total | 1,216,959 | 1,235,705
Unrealized Losses, Total | (227,534) | (266,765)
U.S. Treasury and U.S. government sponsored entities |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 0 | 52,311
Unrealized Losses, Less Than 12 Months | 0 | (5,835)
Fair Value, 12 Months or Longer | 131,976 | 75,685
Unrealized Losses, 12 Months or Longer | (17,900) | (15,781)
Fair Value, Total | 131,976 | 127,996
Unrealized Losses, Total | (17,900) | (21,616)
State and political subdivisions |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 31,898 | 306,709
Unrealized Losses, Less Than 12 Months | (744) | (56,650)
Fair Value, 12 Months or Longer | 440,668 | 191,584
Unrealized Losses, 12 Months or Longer | (97,278) | (65,241)
Fair Value, Total | 472,566 | 498,293
Unrealized Losses, Total | (98,022) | (121,891)
Corporate bonds |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 985 | 2,893
Unrealized Losses, Less Than 12 Months | (12) | (122)
Fair Value, 12 Months or Longer | 4,114 | 986
Unrealized Losses, 12 Months or Longer | (263) | (180)
Fair Value, Total | 5,099 | 3,879
Unrealized Losses, Total | (275) | (302)
Mortgage-backed securities - residential |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 81 | 101,476
Unrealized Losses, Less Than 12 Months | (1) | (13,545)
Fair Value, 12 Months or Longer | 555,585 | 453,233
Unrealized Losses, 12 Months or Longer | (106,255) | (104,109)
Fair Value, Total | 555,666 | 554,709
Unrealized Losses, Total | (106,256) | (117,654)
Collateralized mortgage obligations |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 2,800 | 42,140
Unrealized Losses, Less Than 12 Months | (70) | (4,137)
Fair Value, 12 Months or Longer | 45,562 | 5,214
Unrealized Losses, 12 Months or Longer | (4,701) | (800)
Fair Value, Total | 48,362 | 47,354
Unrealized Losses, Total | (4,771) | (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 | 3,290 | 2,179
Unrealized Losses, 12 Months or Longer | (310) | (243)
Fair Value, Total | 3,290 | 3,474
Unrealized Losses, Total | $ (310) | $ (365)

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