Medical Expenses Payable - Schedule of Medical Expenses Payable (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Insurance [Abstract]
Claims incurred but not paid	$ 77,374	$ 82,391	$ 69,079	$ 83,939
Capitation payable, risk-sharing payable, and other	59,104	30,214
Total medical expenses payable	$ 136,478	$ 112,605	$ 105,036