Medical Claims and Related Payables - Summary Changes in Medical Claims and Related Payables (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
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 period	458,038
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
Components of incurred costs related to:
Current year	1,140,375	803,711
Prior years	12,973	(874)
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims	1,153,119	802,209
Claims paid related to:
Current year	(706,478)	(517,368)
Prior years	(227,777)	(144,260)
Claims paid related	(934,095)	(665,389)
Medical claims and related payables, end of the period	458,038	300,981
Discontinued Operations | Medical Claims and Related Payables
Components of incurred costs related to:
Current year	0	1,234
Prior years	(229)	(1,862)
Claims paid related to:
Current year	0	(298)
Prior years	$ (160)	$ (3,463)