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Goodwill and Other Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill by Segment (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2024 | Dec. 31, 2023
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | $ 202,252 |
Impairment | (16,224) |
Foreign currency translation | (628) |
Goodwill, ending balance | 185,400 |
Goodwill, gross | 208,870 | $ 209,498
Accumulated impairment losses | (23,470) | (7,246)
Executive Search |  |
Goodwill [Roll Forward] |  |
Goodwill, gross | 92,786 | 93,234
On-Demand Talent |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 109,018 |
Impairment | (14,761) |
Foreign currency translation | (180) |
Goodwill, ending balance | 94,077 |
Goodwill, gross | 108,838 | 109,018
Accumulated impairment losses | (14,761) | 0
Heidrick Consulting |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 0 |
Impairment | 0 |
Foreign currency translation | 0 |
Goodwill, ending balance | 0 |
Goodwill, gross | 7,246 | 7,246
Accumulated impairment losses | (7,246) | (7,246)
Americas | Executive Search |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 91,740 |
Impairment | 0 |
Foreign currency translation | (417) |
Goodwill, ending balance | 91,323 |
Goodwill, gross | 91,323 | 91,740
Accumulated impairment losses | 0 | 0
Europe | Executive Search |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 1,494 |
Impairment | (1,463) |
Foreign currency translation | (31) |
Goodwill, ending balance | 0 |
Goodwill, gross | 1,463 | 1,494
Accumulated impairment losses | $ (1,463) | $ 0

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