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Securities - Schedule of Available-for-sale Securities with Unrealized Losses (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Available-for-sale securities |  |
Fair Value, Less than 12 Months | $ 66,423 | $ 31,829
Unrealized Losses, Less than 12 Months | 281 | 286
Fair Value, 12 Months or Longer | 958,132 | 1,011,691
Unrealized Losses, 12 Months or Longer | 150,336 | 140,922
Fair Value | 1,024,555 | 1,043,520
Unrealized Losses | 150,617 | 141,208
U.S. Treasuries |  |
Available-for-sale securities |  |
Fair Value, Less than 12 Months | 19,876 | 0
Unrealized Losses, Less than 12 Months | 2 | 0
Fair Value, 12 Months or Longer | 65,756 | 65,663
Unrealized Losses, 12 Months or Longer | 4,980 | 5,009
Fair Value | 85,632 | 65,663
Unrealized Losses | 4,982 | 5,009
Obligations of U.S. Government sponsored entities |  |
Available-for-sale securities |  |
Fair Value, Less than 12 Months | 29,993 | 14,453
Unrealized Losses, Less than 12 Months | 14 | 110
Fair Value, 12 Months or Longer | 214,490 | 220,913
Unrealized Losses, 12 Months or Longer | 23,198 | 22,167
Fair Value | 244,483 | 235,366
Unrealized Losses | 23,212 | 22,277
Obligations of U.S. states and political subdivisions |  |
Available-for-sale securities |  |
Fair Value, Less than 12 Months | 2,236 | 10,572
Unrealized Losses, Less than 12 Months | 8 | 106
Fair Value, 12 Months or Longer | 76,125 | 69,601
Unrealized Losses, 12 Months or Longer | 10,080 | 7,971
Fair Value | 78,361 | 80,173
Unrealized Losses | 10,088 | 8,077
U.S. Government agencies |  |
Available-for-sale securities |  |
Fair Value, Less than 12 Months | 0 | 1,145
Unrealized Losses, Less than 12 Months | 0 | 4
Fair Value, 12 Months or Longer | 39,801 | 43,764
Unrealized Losses, 12 Months or Longer | 5,311 | 4,740
Fair Value | 39,801 | 44,909
Unrealized Losses | 5,311 | 4,744
U.S. Government sponsored entities |  |
Available-for-sale securities |  |
Fair Value, Less than 12 Months | 14,318 | 5,659
Unrealized Losses, Less than 12 Months | 257 | 66
Fair Value, 12 Months or Longer | 559,593 | 609,456
Unrealized Losses, 12 Months or Longer | 106,634 | 100,829
Fair Value | 573,911 | 615,115
Unrealized Losses | 106,891 | 100,895
U.S. corporate debt securities |  |
Available-for-sale securities |  |
Fair Value, Less than 12 Months | 0 | 0
Unrealized Losses, Less than 12 Months | 0 | 0
Fair Value, 12 Months or Longer | 2,367 | 2,294
Unrealized Losses, 12 Months or Longer | 133 | 206
Fair Value | 2,367 | 2,294
Unrealized Losses | $ 133 | $ 206

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