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Transactions - Schedule of Pro Forma Adjustments (Details) - NIA - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Business Acquisition [Line Items] |  |  |  |
Revenue | $ 556,055 | $ 1,975,321 | $ 1,607,311 | $ 1,135,126
Net loss attributable to common shareholders of Evolent Health, Inc. | $ (41,395) | $ (137,210) | $ (76,406) | $ (103,442)

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