Segments - Financial Highlights by Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Segment Reporting Information [Line Items]
Total revenue	$ 712,447	$ 735,719	$ 1,418,709	$ 1,438,867
Adjusted EBITDA	98,542	131,103	194,200	263,311
Operating Segments | Consulting
Segment Reporting Information [Line Items]
Total revenue	180,953	175,845	351,746	344,580
Adjusted EBITDA	28,928	31,089	54,108	60,639
Operating Segments | Digital
Segment Reporting Information [Line Items]
Total revenue	97,157	94,577	185,169	178,392
Adjusted EBITDA	28,983	27,524	53,308	51,702
Operating Segments | North America
Segment Reporting Information [Line Items]
Total revenue	133,933	144,147	263,346	297,031
Adjusted EBITDA	29,436	37,969	58,192	81,718
Operating Segments | EMEA
Segment Reporting Information [Line Items]
Total revenue	43,315	44,919	90,450	92,248
Adjusted EBITDA	5,619	8,081	11,257	16,596
Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Total revenue	19,460	23,523	44,070	49,975
Adjusted EBITDA	3,875	5,834	10,190	13,185
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Total revenue	8,085	7,822	14,507	15,631
Adjusted EBITDA	805	2,607	2,546	5,224
Operating Segments | Professional Search & Interim
Segment Reporting Information [Line Items]
Total revenue	139,455	135,762	282,524	235,814
Adjusted EBITDA	25,622	32,457	49,951	61,618
Operating Segments | RPO
Segment Reporting Information [Line Items]
Total revenue	90,089	109,124	186,897	225,196
Adjusted EBITDA	8,855	16,004	19,326	33,713
Corporate
Segment Reporting Information [Line Items]
Total revenue	0	0	0	0
Adjusted EBITDA	(33,581)	(30,462)	(64,678)	(61,084)
Fee revenue
Segment Reporting Information [Line Items]
Total revenue	704,003	727,849	1,403,192	1,423,752
Fee revenue | Operating Segments | Consulting
Segment Reporting Information [Line Items]
Total revenue	177,795	173,092	345,883	339,576
Fee revenue | Operating Segments | Digital
Segment Reporting Information [Line Items]
Total revenue	97,092	94,329	185,078	178,090
Fee revenue | Operating Segments | North America
Segment Reporting Information [Line Items]
Total revenue	132,512	142,485	260,010	294,029
Fee revenue | Operating Segments | EMEA
Segment Reporting Information [Line Items]
Total revenue	43,098	44,645	89,874	91,701
Fee revenue | Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Total revenue	19,304	23,408	43,843	49,789
Fee revenue | Operating Segments | Latin America
Segment Reporting Information [Line Items]
Total revenue	8,079	7,821	14,500	15,629
Fee revenue | Operating Segments | Professional Search & Interim
Segment Reporting Information [Line Items]
Total revenue	138,384	134,743	280,563	233,690
Fee revenue | Operating Segments | RPO
Segment Reporting Information [Line Items]
Total revenue	$ 87,739	$ 107,326	$ 183,441	$ 221,248