Medical Expenses Payable - Components of Change in Medical Expenses Payable (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Insurance [Abstract]
Claims incurred but not paid - beginning balance	$ 77,073	$ 82,391
Incurred related to:
Current year	189,468	164,620
Prior years	(14,657)	(3,016)
Total incurred, net of reinsurance	174,811	161,604
Payments related to:
Current year	112,674	100,606
Prior years	54,543	66,015
Total payments, net of reinsurance	167,217	166,621
Claims incurred but not paid - ending balance	84,667	77,374
Capitation payable, risk-sharing payable, and other	89,204	59,104	$ 48,813
Total medical expenses payable	$ 173,871	$ 136,478	$ 125,886