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Acquisitions (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jun. 03, 2026 | Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Business Combination [Line Items] |  |  |  |  |
Revenues before reimbursable expenses |  | $ 475,042 | $ 411,755 | $ 926,809 | $ 815,896
Goodwill recorded in connection with business acquisitions(1) |  |  |  | $ 18,550 |
Business Combination, Provisional Information, Initial Accounting Incomplete, Items |  |  |  | The acquisition date values of assets acquired and liabilities assumed in the acquisition are considered preliminary and are based on the information that was available as of the date of the acquisition. We believe that the information provides a reasonable basis for estimating the preliminary values of assets acquired and liabilities assumed but certain items, such as the valuations of the intangible assets and deferred taxes and purchase price adjustments, among other items, may be subject to change as additional information is received. Thus, the provisional measurements of assets acquired, including goodwill, and liabilities assumed related to the acquisition are subject to change. We expect to finalize the valuations as soon as practicable, but not later than one year from the acquisition date. |
2025 Acquisitions |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Business Combination, Consideration Transferred |  |  |  | $ 159,700 |
us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired |  |  |  | 110,200 |
Business Combination, Consideration Transferred, Equity Interest |  |  |  | 29,200 |
Asset Acquisition, Contingent Consideration, Liability |  |  |  | 20,300 |
Goodwill recorded in connection with business acquisitions(1) |  |  |  | 108,100 |
Business Combination, Goodwill, Expected Tax Deductible, Amount |  | 98,700 |  | 98,700 |
Intangible Asset, Finite-Lived, Acquired |  |  |  | 58,100 |
Healthcare |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Revenues before reimbursable expenses |  | 236,852 | 203,271 | 466,037 | 406,592
Commercial: |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Revenues before reimbursable expenses |  | $ 96,002 | 76,798 | 188,973 | 152,602
Goodwill recorded in connection with business acquisitions(1) |  |  |  | 209 |
Education/Healthcare | 2025 Acquisitions |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Goodwill recorded in connection with business acquisitions(1) |  |  |  | 10,400 |
TVG_Treliant Holdings, LLC | Customer relationships | 2025 Acquisitions |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Intangible Asset, Finite-Lived, Acquired |  |  |  | $ 19,100 |
Useful Life (in years) |  | 10 years |  | 10 years |
TVG_Treliant Holdings, LLC | Commercial: | 2025 Acquisitions |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Goodwill recorded in connection with business acquisitions(1) |  |  |  | $ 27,400 |
Eclipse LLC | 2025 Acquisitions |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Intangible Asset, Finite-Lived, Acquired |  |  |  | 27,600 |
Eclipse LLC | Customer relationships | 2025 Acquisitions |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Intangible Asset, Finite-Lived, Acquired |  |  |  | $ 25,500 |
Useful Life (in years) |  | 10 years |  | 10 years |
Eclipse LLC | Technology and software | 2025 Acquisitions |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Intangible Asset, Finite-Lived, Acquired |  |  |  | $ 2,100 |
Useful Life (in years) |  | 5 years |  | 5 years |
Eclipse LLC | Healthcare | 2025 Acquisitions |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Goodwill recorded in connection with business acquisitions(1) |  |  |  | $ 53,800 |
Wilson Perumal and Company, Inc. | Commercial: | 2025 Acquisitions |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Goodwill recorded in connection with business acquisitions(1) |  |  |  | 16,500 |
RelateCare |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Goodwill recorded in connection with business acquisitions(1) |  |  |  | 18,300 |
Business Combination, Goodwill, Expected Tax Deductible, Amount |  | $ 18,300 |  | 18,300 |
Intangible Asset, Finite-Lived, Acquired |  |  |  | $ 16,400 |
Useful Life (in years) |  | 10 years |  | 10 years |
Business Combination, Effective Date of Acquisition | Jun. 03, 2026 |  |  |  |
Business Combination, Voting Equity Interest Acquired, Percentage | 100.00% |  |  |  |
Business Combination, Description of Acquiree | a provider of AI-enabled clinical and patient access solutions |  |  |  |
Business Combination, Name of Acquiree | Akusus Holdings Limited |  |  |  |
2025 Acquisitions |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Revenues before reimbursable expenses |  |  | $ 2,100 |  | $ 2,400

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