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Restricted Available-for-Sale Investments - Summary of Gross Unrealized Losses And Estimated Fair Values of Restricted AFS Investments (Details) - Restricted Investments - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Schedule Of Available For Sale Securities [Line Items] |  |
Less than 12 Months, Estimated Fair Value | $ 2,212 | $ 2,205
Less than 12 Months, Gross Unrealized Losses | (25) | (13)
12 Months or Longer, Estimated Fair Value | 0 | 0
12 Months or Longer, Gross Unrealized Losses | 0 | 0
Total Estimated Fair Value | 2,212 | 2,205
Total Gross Unrealized Losses | $ (25) | $ (13)

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