Variable Interest Entities - Schedule of Operating Results (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Variable Interest Entity [Line Items]
Revenue	$ 1,435,321	$ 1,450,932	$ 4,363,085	$ 4,538,044
Income (loss) from operations	(131,274)	(133,508)	(269,411)	(184,030)
Net income (loss)	(110,207)	(117,615)	(202,465)	(154,361)
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Variable Interest Entity [Line Items]
Income (loss) from operations	15,321	3,786	37,930	24,643
Net income (loss)	13,141	2,014	31,213	17,566
Physician compensation expense	26,600	16,500	63,200	47,000
Operating expenses	3,700	9,100	12,100	11,700
Medical services revenue
Variable Interest Entity [Line Items]
Revenue	1,432,437	1,447,697	4,354,355	4,528,471
Expenses	(1,489,479)	(1,505,950)	(4,336,591)	(4,323,852)
Medical services revenue | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Variable Interest Entity [Line Items]
Revenue	458,309	454,410	1,306,580	1,341,484
Expenses	(401,473)	(413,189)	(1,155,228)	(1,218,902)
Other operating revenue
Variable Interest Entity [Line Items]
Revenue	2,884	3,235	8,730	9,573
Expenses	(13,488)	(9,149)	(95,845)	(171,096)
Other operating revenue | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Variable Interest Entity [Line Items]
Expenses	$ (33,660)	$ (23,817)	$ (87,750)	$ (71,490)