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v3.24.0.1

Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Segment Reporting Information [Line Items] |  |  |
Revenue before reimbursements (net revenue) | $ 1,026,864 | $ 1,073,464 | $ 1,003,001
Total revenue | 1,041,182 | 1,083,586 | 1,008,474
Adjusted EBITDA | 125,617 | 120,878 | 128,988
Depreciation and amortization | 18,508 | 10,603 | 19,560
Capital expenditures | 13,433 | 11,134 | 6,240
Total Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Adjusted EBITDA | 202,285 | 199,376 | 183,655
Depreciation and amortization | 15,787 | 9,622 | 19,099
Capital expenditures | 5,753 | 4,930 |
Executive Search Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Adjusted EBITDA | 206,674 | 206,156 | 193,748
Depreciation and amortization | 5,411 | 6,075 | 16,044
Capital expenditures | 4,796 | 4,070 | 5,068
On-Demand Talent |  |  |
Segment Reporting Information [Line Items] |  |  |
Adjusted EBITDA | 1,434 | (336) | 4,592
Depreciation and amortization | 8,197 | 2,669 | 2,010
Capital expenditures | 398 | 732 | 0
Heidrick Consulting |  |  |
Segment Reporting Information [Line Items] |  |  |
Adjusted EBITDA | (5,823) | (6,444) | (14,685)
Depreciation and amortization | 2,179 | 878 | 1,045
Capital expenditures | 559 | 128 | 174
Research And Development Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Adjusted EBITDA | (20,535) | (19,965) | 0
Depreciation and amortization | 2,073 | 524 | 0
Capital expenditures | 7,170 | 4,878 | 0
Global Operations Support |  |  |
Segment Reporting Information [Line Items] |  |  |
Adjusted EBITDA | (56,133) | (58,533) | (54,667)
Depreciation and amortization | 648 | 457 | 461
Capital expenditures | 510 | 1,326 | 998
Service |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue before reimbursements (net revenue) | 1,026,864 | 1,073,464 | 1,003,001
Service | Executive Search Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue before reimbursements (net revenue) | 780,045 | 901,922 | 868,760
Service | On-Demand Talent |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue before reimbursements (net revenue) | 152,506 | 91,349 | 66,636
Service | Heidrick Consulting |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue before reimbursements (net revenue) | 94,313 | 80,193 | 67,605
Reimbursements |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue before reimbursements (net revenue) | 14,318 | 10,122 | 5,473
Americas | Executive Search Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Adjusted EBITDA | 173,358 | 164,193 | 154,087
Depreciation and amortization | 3,092 | 3,498 | 12,843
Capital expenditures | 2,351 | 1,890 | 4,487
Americas | Service | Executive Search Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue before reimbursements (net revenue) | 522,988 | 612,881 | 581,440
Europe | Executive Search Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Adjusted EBITDA | 22,246 | 22,150 | 20,219
Depreciation and amortization | 1,343 | 1,451 | 1,802
Capital expenditures | 1,827 | 683 | 372
Europe | Service | Executive Search Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue before reimbursements (net revenue) | 166,379 | 176,275 | 170,312
Asia Pacific | Total Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures |  |  | 5,242
Asia Pacific | Executive Search Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Adjusted EBITDA | 11,070 | 19,813 | 19,442
Depreciation and amortization | 976 | 1,126 | 1,399
Capital expenditures | 618 | 1,497 | 209
Asia Pacific | Service | Executive Search Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue before reimbursements (net revenue) | $ 90,678 | $ 112,766 | $ 117,008

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