Variable Interest Entities - Schedule of Operating Results (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Variable Interest Entity [Line Items]
Revenue	$ 1,420,460	$ 1,532,782
Income (loss) from operations	3,997	(22,110)
Net income (loss)	48,916	12,112
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Variable Interest Entity [Line Items]
Income (loss) from operations	14,836	16,213
Net income (loss)	11,659	12,677
Physician compensation expense	33,700	27,800
Operating expenses	12,500	4,200
Medical services revenue
Variable Interest Entity [Line Items]
Revenue	1,418,549	1,529,879
Expenses	(1,269,628)	(1,401,867)
Medical services revenue | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Variable Interest Entity [Line Items]
Revenue	439,845	413,465
Expenses	(367,698)	(351,853)
Other operating revenue
Variable Interest Entity [Line Items]
Revenue	1,911	2,903
Expenses	(85,817)	(80,193)
Other operating revenue | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Variable Interest Entity [Line Items]
Expenses	$ (40,084)	$ (36,242)