Medical Claims and Related Payables - Summary Changes in Medical Claims and Related Payables (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Medical claims and related payables, beginning of the year	$ 918,394	$ 723,071	$ 339,749
Components of incurred costs related to:
Incurred cost related to claims	5,977,906	5,842,530	4,278,881
Claims paid related to:
Claims paid related	(6,001,016)	(5,647,207)	(3,895,559)
Medical claims and related payables, end of the year	895,284	918,394	723,071
Continuing Operations
Components of incurred costs related to:
Current year	5,953,295	5,798,709	3,956,874
Prior years	24,611	43,821	51,785
Claims paid related to:
Current year	(5,040,008)	(4,878,351)	(3,237,050)
Prior years	(961,008)	(768,856)	(344,269)
Discontinued Operations
Components of incurred costs related to:
Current year	0	0	263,214
Prior years	0	0	7,008
Claims paid related to:
Current year	0	0	(263,215)
Prior years	$ 0	$ 0	$ (51,025)