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Related-Party Transactions - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	May 28, 2025	Dec. 31, 2024	Mar. 31, 2024
Related Party Transaction [Line Items]
Revenue	$ 654,808	$ 486,265	$ 1,275,196	$ 890,621
Operating lease right-of-use assets	30,631		30,631			$ 32,601
Expenses payable	3,000	1,200	5,200	1,700
Investments in privately held entities	8,896		8,896			8,896
Operating lease liabilities	34,033		34,033
Operating lease liabilities	5,319		5,319			5,350
Payments for repurchase of shares			10,600	0
Third Way Health \| Agreement for Future Equity Fund
Related Party Transaction [Line Items]
Investments in privately held entities	6,000		6,000			6,000
Risk pool settlements and incentives
Related Party Transaction [Line Items]
Revenue	15,402	18,408	29,893	35,785
Related Party \| Management Fee Services, Provider Services, and Interest Expense \| Equity Method Investments
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	2,200	1,400	3,800	2,500
Related Party \| Management Fees \| Equity Method Investments
Related Party Transaction [Line Items]
Proceeds from related party debt			900
Allied Pacific Holdings Investment Management, LLC \| Chief Executive Officer
Related Party Transaction [Line Items]
Operating lease right-of-use assets	6,900		6,900			2,700
Operating lease liabilities	7,200		7,200			2,700
AHMC
Related Party Transaction [Line Items]
Amount outstanding under agreement	55,100		55,100			$ 47,700
AHMC \| Related Party \| Risk pool settlements and incentives
Related Party Transaction [Line Items]
Revenue	2,800	11,000	7,800	19,100
APC \| Board Members \| Provider Services
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	4,700	4,900	9,200	9,600
APC \| Board Members Who Are Also Officers \| Provider Services
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	600	600	1,200	1,400
AMG \| Allied Pacific Holdings Investment Management, LLC \| Office Lease
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	$ 1,300	$ 800	$ 2,500	$ 1,700
I Health, Inc.
Related Party Transaction [Line Items]
Equity interest (as a percent)	25.00%		25.00%		37.50%		25.00%