Medical Liabilities - Schedule of Medical Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Medical Liabilities [Roll Forward]
Medical liabilities, beginning of year	$ 50,330	$ 58,725
Acquired (see Note 3)	175	0
Components of medical care costs related to claims incurred:
Current period	347,720	309,848
Prior periods	553	(3,258)
Total medical care costs	348,273	306,590
Payments for medical care costs related to claims incurred:
Current period	(291,243)	(261,062)
Prior periods	(51,231)	(54,056)
Total paid	(342,474)	(315,118)
Adjustments	(521)	133
Medical liabilities, end of year	$ 55,783	$ 50,330