Segments - Financial Highlights by Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2024	Oct. 31, 2023
Segment Reporting Information [Line Items]
Total revenue	$ 681,960	$ 712,447	$ 1,364,721	$ 1,418,709
Adjusted EBITDA	117,027	98,542	228,236	194,200
Operating Segments | Consulting
Segment Reporting Information [Line Items]
Total revenue	169,384	180,953	340,151	351,746
Adjusted EBITDA	29,106	28,928	58,400	54,108
Operating Segments | Digital
Segment Reporting Information [Line Items]
Total revenue	93,038	97,157	181,249	185,169
Adjusted EBITDA	29,188	28,983	55,811	53,308
Operating Segments | North America
Segment Reporting Information [Line Items]
Total revenue	131,419	133,933	267,506	263,346
Adjusted EBITDA	36,907	29,436	72,005	58,192
Operating Segments | EMEA
Segment Reporting Information [Line Items]
Total revenue	47,132	43,315	93,408	90,450
Adjusted EBITDA	7,487	5,619	14,752	11,257
Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Total revenue	21,540	19,460	42,244	44,070
Adjusted EBITDA	4,432	3,875	8,650	10,190
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Total revenue	7,859	8,085	15,185	14,507
Adjusted EBITDA	2,552	805	5,350	2,546
Operating Segments | Professional Search & Interim
Segment Reporting Information [Line Items]
Total revenue	121,988	139,455	244,718	282,524
Adjusted EBITDA	27,203	25,622	52,909	49,951
Operating Segments | RPO
Segment Reporting Information [Line Items]
Total revenue	89,600	90,089	180,260	186,897
Adjusted EBITDA	12,899	8,855	25,393	19,326
Corporate
Segment Reporting Information [Line Items]
Total revenue	0	0	0	0
Adjusted EBITDA	(32,747)	(33,581)	(65,034)	(64,678)
Fee revenue
Segment Reporting Information [Line Items]
Total revenue	674,365	704,003	1,349,311	1,403,192
Fee revenue | Operating Segments | Consulting
Segment Reporting Information [Line Items]
Total revenue	166,771	177,795	334,641	345,883
Fee revenue | Operating Segments | Digital
Segment Reporting Information [Line Items]
Total revenue	92,893	97,092	181,073	185,078
Fee revenue | Operating Segments | North America
Segment Reporting Information [Line Items]
Total revenue	129,891	132,512	264,643	260,010
Fee revenue | Operating Segments | EMEA
Segment Reporting Information [Line Items]
Total revenue	46,788	43,098	92,769	89,874
Fee revenue | Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Total revenue	21,464	19,304	42,043	43,843
Fee revenue | Operating Segments | Latin America
Segment Reporting Information [Line Items]
Total revenue	7,856	8,079	15,179	14,500
Fee revenue | Operating Segments | Professional Search & Interim
Segment Reporting Information [Line Items]
Total revenue	121,107	138,384	242,848	280,563
Fee revenue | Operating Segments | RPO
Segment Reporting Information [Line Items]
Total revenue	$ 87,595	$ 87,739	$ 176,115	$ 183,441