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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
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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