Segments - Financial Highlights by Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023
Segment Reporting Information [Line Items]
Total revenue	$ 676,873	$ 686,845	$ 2,095,582	$ 2,125,712
Adjusted EBITDA	101,704	96,111	295,904	359,422
Operating Segments | Consulting
Segment Reporting Information [Line Items]
Total revenue	169,929	164,414	521,675	508,994
Adjusted EBITDA	27,812	23,305	81,920	83,944
Operating Segments | Digital
Segment Reporting Information [Line Items]
Total revenue	90,394	85,087	275,563	263,479
Adjusted EBITDA	27,370	22,153	80,678	73,855
Operating Segments | North America
Segment Reporting Information [Line Items]
Total revenue	123,059	134,255	386,405	431,286
Adjusted EBITDA	29,382	30,446	87,574	112,164
Operating Segments | EMEA
Segment Reporting Information [Line Items]
Total revenue	49,171	49,195	139,621	141,443
Adjusted EBITDA	7,799	7,981	19,056	24,577
Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Total revenue	21,384	22,694	65,454	72,669
Adjusted EBITDA	4,500	5,538	14,690	18,723
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Total revenue	7,543	7,658	22,050	23,289
Adjusted EBITDA	1,750	2,462	4,296	7,686
Operating Segments | Professional Search & Interim
Segment Reporting Information [Line Items]
Total revenue	131,824	118,616	414,348	354,430
Adjusted EBITDA	23,795	21,969	73,746	83,587
Operating Segments | RPO
Segment Reporting Information [Line Items]
Total revenue	83,569	104,926	270,466	330,122
Adjusted EBITDA	9,291	9,849	28,617	43,562
Corporate
Segment Reporting Information [Line Items]
Total revenue	0	0	0	0
Adjusted EBITDA	(29,995)	(27,592)	(94,673)	(88,676)
Fee revenue
Segment Reporting Information [Line Items]
Total revenue	668,679	680,782	2,071,871	2,104,534
Fee revenue | Operating Segments | Consulting
Segment Reporting Information [Line Items]
Total revenue	166,947	162,155	512,830	501,731
Fee revenue | Operating Segments | Digital
Segment Reporting Information [Line Items]
Total revenue	90,317	85,071	275,395	263,161
Fee revenue | Operating Segments | North America
Segment Reporting Information [Line Items]
Total revenue	121,449	132,810	381,459	426,839
Fee revenue | Operating Segments | EMEA
Segment Reporting Information [Line Items]
Total revenue	48,999	48,960	138,873	140,661
Fee revenue | Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Total revenue	21,324	22,621	65,167	72,410
Fee revenue | Operating Segments | Latin America
Segment Reporting Information [Line Items]
Total revenue	7,541	7,654	22,041	23,283
Fee revenue | Operating Segments | Professional Search & Interim
Segment Reporting Information [Line Items]
Total revenue	130,890	117,980	411,453	351,670
Fee revenue | Operating Segments | RPO
Segment Reporting Information [Line Items]
Total revenue	$ 81,212	$ 103,531	$ 264,653	$ 324,779