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Securities - Unrealized Losses on Held-to-Maturity Debt Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Fair Value |  |
Less than 12 Months | $ 280,917 | $ 119,872
12 Months or Longer | 0 | 0
Total | 280,917 | 119,872
Unrealized Losses |  |
Less than 12 Months | 22,607 | 2,389
12 Months or Longer | 0 | 0
Total | 22,607 | 2,389
U.S. Treasuries |  |
Fair Value |  |
Less than 12 Months | 80,633 | 35,280
12 Months or Longer | 0 | 0
Total | 80,633 | 35,280
Unrealized Losses |  |
Less than 12 Months | 6,002 | 600
12 Months or Longer | 0 | 0
Total | 6,002 | 600
Obligations of U.S. Government sponsored entities |  |
Fair Value |  |
Less than 12 Months | 200,284 | 84,592
12 Months or Longer | 0 | 0
Total | 200,284 | 84,592
Unrealized Losses |  |
Less than 12 Months | 16,605 | 1,789
12 Months or Longer | 0 | 0
Total | $ 16,605 | $ 1,789

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