Medical Expenses Payable - Components of Change in Medical Expenses Payable (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Insurance [Abstract]
Claims incurred but not paid - beginning balance	$ 77,073	$ 82,391
Incurred related to:
Current year	293,036	246,352
Prior years	(15,757)	(4,034)
Total incurred, net of reinsurance	277,279	242,318
Payments related to:
Current year	212,028	170,496
Prior years	56,689	68,457
Total payments, net of reinsurance	268,717	238,953
Claims incurred but not paid - ending balance	85,635	85,756
Capitation payable, risk-sharing payable, and other	85,760	43,019	$ 48,813
Total medical expenses payable	$ 171,395	$ 128,775	$ 125,886