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Goodwill and Intangible Assets - Changes in Carrying Value of Goodwill By Reportable Segment (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2022 | Apr. 30, 2021
Goodwill [Line Items] |  |  |
Goodwill, Beginning Balance |  | $ 626,669 | $ 613,943
Business acquisitions adjustment, increase in goodwill |  |  | 2,643
Additions | [1] | 104,962 |
Exchange rate fluctuations |  | (6,039) | 10,083
Goodwill, Ending Balance |  | 725,592 | 626,669
Operating Segments | Consulting |  |  |
Goodwill [Line Items] |  |  |
Goodwill, Beginning Balance |  | 173,410 | 173,014
Exchange rate fluctuations |  | (440) | 396
Goodwill, Ending Balance |  | 172,970 | 173,410
Operating Segments | Executive Search | North America |  |  |
Goodwill [Line Items] |  |  |
Goodwill, Beginning Balance |  | 48,498 | 45,721
Exchange rate fluctuations |  | (934) | 2,777
Goodwill, Ending Balance |  | 47,564 | 48,498
Operating Segments | Executive Search | EMEA |  |  |
Goodwill [Line Items] |  |  |
Goodwill, Beginning Balance |  | 47,449 | 44,494
Exchange rate fluctuations |  | (877) | 2,955
Goodwill, Ending Balance |  | 46,572 | 47,449
Operating Segments | Executive Search | Asia Pacific |  |  |
Goodwill [Line Items] |  |  |
Goodwill, Beginning Balance |  | 972 | 972
Goodwill, Ending Balance |  | 972 | 972
Operating Segments | Digital |  |  |
Goodwill [Line Items] |  |  |
Goodwill, Beginning Balance |  | 326,628 | 322,727
Business acquisitions adjustment, increase in goodwill |  |  | 2,643
Exchange rate fluctuations |  | (1,274) | 1,258
Goodwill, Ending Balance |  | 325,354 | 326,628
Operating Segments | RPO & Professional Search |  |  |
Goodwill [Line Items] |  |  |
Goodwill, Beginning Balance |  | 29,712 | 27,015
Additions | [1] | 104,962 |
Exchange rate fluctuations |  | (2,514) | 2,697
Goodwill, Ending Balance |  | $ 132,160 | $ 29,712
[1] | Additions to goodwill in fiscal 2022 was due to $76.8 million and $28.2 million from the acquisition of the Lucas Group and Patina Solutions Group, respectively.

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