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v3.25.1

Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | $ 4,847 | $ 4,790
Capital expenditures | 2,734 | 6,173
Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | 3,260 | 3,866
Capital expenditures | 1,033 | 3,952
Operating Segments | Executive Search |  |
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | 1,187 | 1,258
Capital expenditures | 853 | 2,907
Operating Segments | On-Demand Talent |  |
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | 1,498 | 1,966
Capital expenditures | 71 | 217
Operating Segments | Heidrick Consulting |  |
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | 575 | 642
Capital expenditures | 109 | 828
Operating Segments | Americas | Executive Search |  |
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | 523 | 761
Capital expenditures | 386 | 513
Operating Segments | Europe | Executive Search |  |
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | 421 | 295
Capital expenditures | 395 | 1,969
Operating Segments | Asia Pacific | Executive Search |  |
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | 243 | 202
Capital expenditures | 72 | 425
Research and development |  |
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | 1,437 | 754
Capital expenditures | 1,625 | 1,839
Global Operations Support |  |
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | 150 | 170
Capital expenditures | $ 76 | $ 382

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