Medical Claims and Related Payables - Summary Changes in Medical Claims and Related Payables (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Liability For Claims And Claims Adjustment Expense [Line Items]
Medical claims and related payables, beginning of the year	$ 239,014
Claims paid related to:
Medical claims and related payables, end of the year	346,727	$ 239,014
Medical Claims and Related Payables
Liability For Claims And Claims Adjustment Expense [Line Items]
Medical claims and related payables, beginning of the year	239,014	164,161	$ 121,779
Components of incurred costs related to:
Current year	2,387,374	1,645,137	1,026,940
Prior years	12,424	2,522	(5,063)
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims	2,399,832	1,646,794	1,106,066
Claims paid related to:
Current year	(2,051,036)	(1,416,404)	(870,979)
Prior years	(247,873)	(151,128)	(94,868)
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid	(2,299,098)	(1,571,941)	(1,063,684)
Medical claims and related payables, end of the year	339,748	239,014	164,161
Medical Claims and Related Payables | Discontinued Operations
Components of incurred costs related to:
Current year	0	1,234	85,732
Prior years	34	(2,099)	(1,543)
Claims paid related to:
Current year	0	(1,234)	(80,754)
Prior years	$ (189)	$ (3,175)	$ (17,083)