Segments - Financial Highlights by Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2024	Jul. 31, 2023
Segment Reporting Information [Line Items]
Total revenue	$ 682,761	$ 706,262
Adjusted EBITDA	111,209	95,658
Operating Segments | Consulting
Segment Reporting Information [Line Items]
Total revenue	170,767	170,793
Adjusted EBITDA	29,294	25,180
Operating Segments | Digital
Segment Reporting Information [Line Items]
Total revenue	88,211	88,012
Adjusted EBITDA	26,623	24,325
Operating Segments | North America
Segment Reporting Information [Line Items]
Total revenue	136,087	129,413
Adjusted EBITDA	35,098	28,756
Operating Segments | EMEA
Segment Reporting Information [Line Items]
Total revenue	46,276	47,135
Adjusted EBITDA	7,265	5,638
Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Total revenue	20,704	24,610
Adjusted EBITDA	4,218	6,315
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Total revenue	7,326	6,422
Adjusted EBITDA	2,798	1,741
Operating Segments | Professional Search & Interim
Segment Reporting Information [Line Items]
Total revenue	122,730	143,069
Adjusted EBITDA	25,706	24,329
Operating Segments | RPO
Segment Reporting Information [Line Items]
Total revenue	90,660	96,808
Adjusted EBITDA	12,494	10,471
Corporate
Segment Reporting Information [Line Items]
Total revenue	0	0
Adjusted EBITDA	(32,287)	(31,097)
Fee revenue
Segment Reporting Information [Line Items]
Total revenue	674,946	699,189
Fee revenue | Operating Segments | Consulting
Segment Reporting Information [Line Items]
Total revenue	167,870	168,088
Fee revenue | Operating Segments | Digital
Segment Reporting Information [Line Items]
Total revenue	88,180	87,986
Fee revenue | Operating Segments | North America
Segment Reporting Information [Line Items]
Total revenue	134,752	127,498
Fee revenue | Operating Segments | EMEA
Segment Reporting Information [Line Items]
Total revenue	45,981	46,776
Fee revenue | Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Total revenue	20,579	24,539
Fee revenue | Operating Segments | Latin America
Segment Reporting Information [Line Items]
Total revenue	7,323	6,421
Fee revenue | Operating Segments | Professional Search & Interim
Segment Reporting Information [Line Items]
Total revenue	121,741	142,179
Fee revenue | Operating Segments | RPO
Segment Reporting Information [Line Items]
Total revenue	$ 88,520	$ 95,702