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Reserve for Claims and Performance-Based Arrangements (Details) - USD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] |  |
Balance, beginning of period | $ 318,705 | $ 404,048
Incurred health care costs: |  |
Current year to date period (1) | 690,793 | 1,117,071
Prior year to date period | (26,646) | (25,897)
Total claims incurred | 664,147 | 1,091,174
Claims paid related to: |  |
Current year to date period | (536,384) | (829,864)
Prior year to date period | (234,816) | (352,671)
Total claims paid | (771,200) | (1,182,535)
Balance, end of period | $ 211,652 | 312,687
True-down in claims expense |  | $ 41,700

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