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Acquisition and Divestiture (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2023 | Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023 | Feb. 28, 2023
Business Acquisition [Line Items] |  |  |  |  |
Gain from sale of divested operation |  | $ 0 | $ 139,316 |  |
TalentNeuron |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Gain from sale of divested operation |  | 139,300 |  | $ 135,400 |
TalentNeuron |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Sale of business, consideration |  |  |  |  | $ 161,100
Gartner Research Products |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Percent of outstanding membership interests acquired | 100.00% |  |  |  |
Purchase price | $ 7,900 |  |  |  |
Payment for contingent consideration liability, investing activities |  | $ 2,000 |  |  |

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