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Reserves for Claims and Performance-Based Arrangements (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]    
Balance, beginning of period $ 404,048 $ 199,730
Incurred health care costs:    
Current year to date period 1,507,740 928,013
Prior year to date period (24,757) (36,925)
Total claims incurred 1,482,983 891,088
Claims paid related to:    
Current year to date period (1,216,364) (549,691)
Prior year to date period (351,962) (137,079)
Total claims paid (1,568,326) (686,770)
Balance, end of period $ 318,705 $ 404,048