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PA Consulting Business Combination - Narrative (Details) - USD ($) $ in Thousands |  | 3 Months Ended
--- | --- | ---
Mar. 02, 2021 | Dec. 31, 2021 | Jan. 01, 2021
Business Acquisition [Line Items] |  |  |
Repurchase of redeemable noncontrolling interests |  | $ (35,095) | $ 0
PA Consulting Employees |  |  |
Business Acquisition [Line Items] |  |  |
Ownership interest of employees | 35.00% |  |
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 |  |
Consideration received from acquiree | 261,000 |  |
Redeemable Noncontrolling interests | $ 582,400 |  |
Cash in employee benefit trust |  | $ 700 |
PA Consulting Group Limited | Customer Relationships, Contracts And Backlog And Trade names |  |  |
Business Acquisition [Line Items] |  |  |
Useful life of acquired intangible assets | 12 years |  |
PA Consulting Group Limited | Customer Relationships, Contracts And Backlog And Trade names | Minimum |  |  |
Business Acquisition [Line Items] |  |  |
Useful life of acquired intangible assets | 9 years |  |
PA Consulting Group Limited | Customer Relationships, Contracts And Backlog And Trade names | Maximum |  |  |
Business Acquisition [Line Items] |  |  |
Useful life of acquired intangible assets | 20 years |  |

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