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Medical Claims and Related Payables - Schedule Changes in Medical Claims and Related Payables (Details) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] |  |
Medical claims and related payables, beginning of the year | $ 918,395 | $ 723,071
Components of incurred costs related to: |  |
Current year | 2,810,528 | 2,802,803
Prior years | 36,584 | 15,099
Incurred cost related to claims | 2,847,112 | 2,817,902
Claims paid related to: |  |
Current year | (1,821,175) | (1,806,692)
Prior years | (930,606) | (650,106)
Claims paid related | (2,751,781) | (2,456,798)
Medical claims and related payables, end of the period | $ 1,013,726 | $ 1,084,175

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