Segments - Financial Highlights (Details) - 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
Net income attributable to Korn Ferry	59,071	11,247	103,965	162,035
Net income attributable to noncontrolling interest	649	522	2,984	2,885
Other income, net	(23,817)	(13,097)	(23,559)	(4,824)
Interest expense, net	4,946	5,378	16,282	20,088
Income tax provision	9,018	8,463	29,779	63,575
Operating income	49,867	12,513	129,451	243,759
Depreciation and amortization	19,509	17,037	58,075	50,359
Other income, net	23,817	13,097	23,559	4,824
Integration/acquisition costs	3,899	2,456	13,057	9,472
Impairment of fixed assets	0	4,375	1,575	4,375
Impairment of right-of-use assets	0	5,471	1,629	5,471
Restructuring charges, net	4,612	41,162	68,558	41,162
Adjusted EBITDA	101,704	96,111	295,904	359,422
Fee revenue
Segment Reporting Information [Line Items]
Total revenue	$ 668,679	$ 680,782	$ 2,071,871	$ 2,104,534