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Reserves for Claims and Performance-Based Arrangements - Schedule of Activity in Claims Reserves and Performance - Based Arrangements (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]    
Balance, beginning of period $ 199,730 $ 171,294
Incurred health care costs:    
Current year to date period 928,013 605,757
Prior year to date period (36,925) (11,512)
Total claims incurred 891,088 594,245
Claims paid related to:    
Current year to date period (549,691) (427,994)
Prior year to date period (137,079) (137,815)
Total claims paid (686,770) (565,809)
Balance, end of period $ 404,048 $ 199,730