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Acquisitions and Divestiture (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2023 | Oct. 31, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Feb. 28, 2023
Business Acquisition [Line Items] |  |  |  |  |  |  |
Proceeds from sale of divested operation |  |  |  |  | $ 156,057 | $ 0 |
Gain from sale of divested operation |  |  | $ 0 | $ 0 | 135,410 | $ 0 |
TalentNeuron |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Gain from sale of divested operation |  |  |  |  | 135,400 |  |
TalentNeuron |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Sale of business, consideration |  |  |  |  |  |  | $ 161,100
Proceeds from sale of divested operation |  |  |  |  | 156,100 |  |
Goodwill | $ 16,000 |  | 16,000 |  | 16,000 |  |
Intangible assets, net | 9,500 |  | 9,500 |  | 9,500 |  |
Property, equipment and leasehold improvements, net, | 4,500 |  | 4,500 |  | 4,500 |  |
Accounts receivable | 11,800 |  | 11,800 |  | 11,800 |  |
Deferred revenues | $ 24,400 |  | $ 24,400 |  | $ 24,400 |  |
Gartner Research Products |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Percent of outstanding membership interests acquired | 100.00% |  | 100.00% |  | 100.00% |  |
Purchase price | $ 7,900 |  |  |  |  |  |
UpCity, Inc. |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Percent of outstanding membership interests acquired |  | 100.00% |  |  |  |  |
Purchase price |  | $ 6,400 |  |  |  |  |

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