Medical Liabilities - Schedule of Medical Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Medical Liabilities [Roll Forward]
Medical liabilities, beginning of period	$ 58,725	$ 33,642
Components of medical care costs related to claims incurred:
Current period	165,571	93,833
Prior periods	233	2,688
Total medical care costs	165,804	96,521
Payments for medical care costs related to claims incurred:
Current period	(97,112)	(60,440)
Prior periods	(57,470)	(39,744)
Total paid	(154,582)	(100,184)
Acquired from Alpha Care	0	13,120
Adjustments	326	(156)
Medical liabilities, end of period	$ 70,273	$ 42,943