Restructuring Charges, Net - Restructuring Charges Incurred by Reporting Unit (Detail) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Restructuring Cost And Reserve [Line Items]
Restructuring charges, net	$ 42,573	$ 0	$ 30,732
Operating Segments | Consulting
Restructuring Cost And Reserve [Line Items]
Restructuring charges, net	11,613	0	14,223
Operating Segments | Digital
Restructuring Cost And Reserve [Line Items]
Restructuring charges, net	2,856	0	2,947
Operating Segments | Executive Search | North America
Restructuring Cost And Reserve [Line Items]
Restructuring charges, net	4,515	0	958
Operating Segments | Executive Search | EMEA
Restructuring Cost And Reserve [Line Items]
Restructuring charges, net	12,732	0	8,868
Operating Segments | Executive Search | Asia Pacific
Restructuring Cost And Reserve [Line Items]
Restructuring charges, net	2,129	0	181
Operating Segments | Executive Search | Latin America
Restructuring Cost And Reserve [Line Items]
Restructuring charges, net	697	0	405
Operating Segments | Professional Search & Interim
Restructuring Cost And Reserve [Line Items]
Restructuring charges, net	4,835	0	1,543
Operating Segments | RPO
Restructuring Cost And Reserve [Line Items]
Restructuring charges, net	3,097	0	1,607
Corporate
Restructuring Cost And Reserve [Line Items]
Restructuring charges, net	$ 99	$ 0	$ 0