Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue	[1]	$ 297,057	$ 215,071
Evolent Health Services
Disaggregation of Revenue [Line Items]
Revenue		106,858	84,838
Evolent Health Services | Medicaid
Disaggregation of Revenue [Line Items]
Revenue		66,914	60,929
Evolent Health Services | Medicare
Disaggregation of Revenue [Line Items]
Revenue		4,833	8,338
Evolent Health Services | Commercial and other
Disaggregation of Revenue [Line Items]
Revenue		35,111	15,571
Clinical Solutions
Disaggregation of Revenue [Line Items]
Revenue		190,199	130,233
Clinical Solutions | Medicaid
Disaggregation of Revenue [Line Items]
Revenue		63,587	43,339
Clinical Solutions | Medicare
Disaggregation of Revenue [Line Items]
Revenue		99,566	85,783
Clinical Solutions | Commercial and other
Disaggregation of Revenue [Line Items]
Revenue		$ 27,046	$ 1,111

[1] See Note 18 for amounts attributable to unconsolidated related parties included in these line items.