Goodwill and Intangible Assets - Schedule of Changes in Carrying Value of Goodwill By Reportable Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2025	Apr. 30, 2024
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 908,376	$ 909,491
Exchange rate fluctuations	3,599	(1,115)
Additions	36,857
Goodwill, ending balance	948,832	908,376
Infinity Consulting Solutions ("ICS")
Goodwill [Roll Forward]
Additions	36,900
Operating Segments | Consulting
Goodwill [Roll Forward]
Goodwill, beginning balance	172,994	173,093
Exchange rate fluctuations	202	(99)
Additions	0
Goodwill, ending balance	173,196	172,994
Operating Segments | Digital
Goodwill [Roll Forward]
Goodwill, beginning balance	325,387	325,558
Exchange rate fluctuations	668	(171)
Additions	0
Goodwill, ending balance	326,055	325,387
Operating Segments | North America
Goodwill [Roll Forward]
Goodwill, beginning balance	46,154	46,237
Exchange rate fluctuations	(310)	(83)
Additions	0
Goodwill, ending balance	45,844	46,154
Operating Segments | EMEA
Goodwill [Roll Forward]
Goodwill, beginning balance	46,246	46,401
Exchange rate fluctuations	388	(155)
Additions	0
Goodwill, ending balance	46,634	46,246
Operating Segments | Asia Pacific
Goodwill [Roll Forward]
Goodwill, beginning balance	972	972
Exchange rate fluctuations	0	0
Additions	0
Goodwill, ending balance	972	972
Operating Segments | Professional Search & Interim
Goodwill [Roll Forward]
Goodwill, beginning balance	254,345	254,666
Exchange rate fluctuations	2,133	(321)
Additions	36,857
Goodwill, ending balance	293,335	254,345
Operating Segments | RPO
Goodwill [Roll Forward]
Goodwill, beginning balance	62,278	62,564
Exchange rate fluctuations	518	(286)
Additions	0
Goodwill, ending balance	$ 62,796	$ 62,278