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Revenue Recognition - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Revenue	[1]	$ 479,533	$ 621,401	$ 1,407,510	$ 1,908,199
Evolent Health Services Segment
Disaggregation of Revenue [Line Items]
Revenue		479,533	621,400	1,407,510	1,908,199
Evolent Health Services Segment | Performance Suite
Disaggregation of Revenue [Line Items]
Revenue		286,935	435,100	857,873	1,344,920
Evolent Health Services Segment | Specialty Technology and Services Suite
Disaggregation of Revenue [Line Items]
Revenue		93,263	85,474	257,485	255,992
Evolent Health Services Segment | Administrative Services
Disaggregation of Revenue [Line Items]
Revenue		57,811	59,396	170,882	178,735
Evolent Health Services Segment | Cases
Disaggregation of Revenue [Line Items]
Revenue		41,524	41,430	121,270	128,552
Evolent Health Services Segment | Medicaid
Disaggregation of Revenue [Line Items]
Revenue		227,535	214,627	608,677	646,819
Evolent Health Services Segment | Medicare
Disaggregation of Revenue [Line Items]
Revenue		128,714	238,527	353,074	794,160
Evolent Health Services Segment | Commercial and other
Disaggregation of Revenue [Line Items]
Revenue		$ 123,284	$ 168,246	$ 445,759	$ 467,220
[1] See Note 18 for amounts attributable to unconsolidated related parties included in these line items.

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