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Goodwill and Other Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill by Segment (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | $ 202,252 |
Foreign currency translation | (2,163) |
Goodwill, ending balance | 200,089 |
Accumulated impairment losses | (7,246) | $ (7,246)
Goodwill, gross | 207,335 | 209,498
Executive Search |  |
Goodwill [Roll Forward] |  |
Goodwill, gross | 93,007 | 93,234
On-Demand Talent |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 109,018 |
Foreign currency translation | (1,936) |
Goodwill, ending balance | 107,082 |
Accumulated impairment losses | 0 | 0
Goodwill, gross | 107,082 | 109,018
Heidrick Consulting |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 0 |
Foreign currency translation | 0 |
Goodwill, ending balance | 0 |
Accumulated impairment losses | (7,246) | (7,246)
Goodwill, gross | 7,246 | 7,246
Americas | Executive Search |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 91,740 |
Foreign currency translation | (193) |
Goodwill, ending balance | 91,547 |
Accumulated impairment losses | 0 | 0
Goodwill, gross | 91,547 | 91,740
Europe | Executive Search |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 1,494 |
Foreign currency translation | (34) |
Goodwill, ending balance | 1,460 |
Accumulated impairment losses | 0 | 0
Goodwill, gross | $ 1,460 | $ 1,494

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