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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, 2024 | Apr. 30, 2023
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | $ 909,491 | $ 725,592
Additions |  | 184,519
Exchange rate fluctuations | (1,115) | (620)
Goodwill, ending balance | 908,376 | 909,491
ICS |  |
Goodwill [Roll Forward] |  |
Additions |  | 68,300
Salo |  |
Goodwill [Roll Forward] |  |
Additions |  | 116,200
Operating Segments | Consulting |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 173,093 | 172,970
Additions |  | 0
Exchange rate fluctuations | (99) | 123
Goodwill, ending balance | 172,994 | 173,093
Operating Segments | Digital |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 325,558 | 325,354
Additions |  | 0
Exchange rate fluctuations | (171) | 204
Goodwill, ending balance | 325,387 | 325,558
Operating Segments | North America |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 46,237 | 47,564
Additions |  | 0
Exchange rate fluctuations | (83) | (1,327)
Goodwill, ending balance | 46,154 | 46,237
Operating Segments | EMEA |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 46,401 | 46,572
Additions |  | 0
Exchange rate fluctuations | (155) | (171)
Goodwill, ending balance | 46,246 | 46,401
Operating Segments | Asia Pacific |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 972 | 972
Additions |  | 0
Exchange rate fluctuations | 0 | 0
Goodwill, ending balance | 972 | 972
Operating Segments | Professional Search & Interim |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 254,666 | 69,856
Additions |  | 184,519
Exchange rate fluctuations | (321) | 291
Goodwill, ending balance | 254,345 | 254,666
Operating Segments | RPO |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 62,564 | 62,304
Additions |  | 0
Exchange rate fluctuations | (286) | 260
Goodwill, ending balance | $ 62,278 | $ 62,564

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