Variable Interest Entities - Schedule of Operating Results (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Revenues	$ 5,932,576	$ 6,060,530	$ 4,316,363
Income (loss) from operations	(463,236)	(292,130)	(232,133)
Net income (loss)	(391,347)	(260,151)	(262,596)
Other income (expense), net	67,616	34,489	27,840
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Variable Interest Entity [Line Items]
Income (loss) from operations	(5,032)	22,687	22,500
Net income (loss)	(1,824)	15,050	16,336
Physician compensation expense	58,900	58,400	53,700
Physician compensation expense, exchange for common stock			15,200
Equity Method Investment, Nonconsolidated Investee or Group of Investees | CMS ACO Models
Variable Interest Entity [Line Items]
Revenues	3,500	3,900	1,600
Other income (expense), net	50,100	14,900	2,900
Medical services revenue
Variable Interest Entity [Line Items]
Revenues	5,921,341	6,047,715	4,307,350
Expenses	(5,977,906)	(5,842,530)	(4,008,659)
Medical services revenue | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Variable Interest Entity [Line Items]
Revenues	1,693,036	1,814,618	1,160,978
Expenses	(1,539,486)	(1,667,806)	(1,024,468)
Other operating revenue
Variable Interest Entity [Line Items]
Revenues	11,235	12,815	9,013
Expenses	(114,691)	(213,159)	(238,034)
Other operating revenue | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Variable Interest Entity [Line Items]
Expenses	$ (90,501)	$ (89,788)	$ (96,154)