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PA Consulting Business Combination - Narrative (Details) - USD ($) $ in Thousands |  | 9 Months Ended |
--- | --- | --- | ---
Mar. 02, 2021 | Jun. 30, 2023 | Jul. 01, 2022 | Sep. 30, 2022
Business Acquisition [Line Items] |  |  |  |
Repurchase of redeemable noncontrolling interests |  | $ 90,425 | $ 46,074 |
Proceeds from issuances of redeemable noncontrolling interests |  | 34,771 | 49,738 |
PA Consulting Employees |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Ownership interest of employees | 35.00% |  |  |
Proceeds from issuances of redeemable noncontrolling interests |  | 34,800 | 49,700 |
PA Consulting Group Limited |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Percentage of outstanding shares of common and preferred stock acquired | 65.00% |  |  |
Consideration transferred | $ 1,700,000 |  |  |
Fair value of redeemable noncontrolling interests | $ 582,400 |  |  |
Allocated share-based compensation expense |  | 5,100 | $ 1,600 |
Cash in employee benefit trust |  | $ 2,000 |  | $ 13,700

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