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Restricted Available-for-Sale Investments (Tables) | 3 Months Ended
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Mar. 31, 2025
Investments, Debt and Equity Securities [Abstract] |
Reconciliation of Restricted AFS Investments |
|  | March 31, 2025 |
Dollars in thousands |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
Restricted investments |  | $ | 21,904 |  |  | $ | — |  |  | $ | (217 | ) |  | $ | 21,687 |
|  | December 31, 2024 |
Dollars in thousands |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
Restricted investments |  | $ | 21,633 |  |  | $ | 92 |  |  | $ | (13 | ) |  | $ | 21,712 |
The following tables include the gross unrealized losses and estimated fair values of restricted AFS investments that were in a continuous unrealized loss position, for which no allowance for credit loss has been recorded, as of the periods indicated:
Summary of Gross Unrealized Losses And Estimated Fair Values of Restricted AFS Investments |
|  | March 31, 2025 |
|  | Less than 12 Months |  |  | 12 Months or Longer |  |  | Total |
Dollars in thousands |  | Estimated Fair Value |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |  |  | Gross Unrealized Losses |
Restricted investments |  | $ | 21,687 |  |  | $ | (217 | ) |  | $ | — |  |  | $ | — |  |  | $ | 21,687 |  |  | $ | (217 | )
|  | December 31, 2024 |
|  | Less than 12 Months |  |  | 12 Months or Longer |  |  | Total |
Dollars in thousands |  | Estimated Fair Value |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |  |  | Gross Unrealized Losses |
Restricted investments |  | $ | 2,205 |  |  | $ | (13 | ) |  | $ | — |  |  | $ | — |  |  | $ | 2,205 |  |  | $ | (13 | )
Summary of Amortized Cost And Estimated Fair Values of Restricted AFS Investments by Contractual Maturity |
|  | March 31, 2025 |
Dollars in thousands |  | Amortized Cost |  |  | Estimated Fair Value |
Due in one year |  | $ | 19,663 |  |  | $ | 19,473 |
Due within one year to five years |  |  | 2,241 |  |  |  | 2,214 |
Due within five years to ten years |  |  | — |  |  |  | — |
Due after ten years |  |  | — |  |  |  | — |
Total |  | $ | 21,904 |  |  | $ | 21,687 |

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- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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