Segments - Financial Highlights (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022
Segment Reporting Information [Line Items]
Total revenue	$ 686,845	$ 684,956	$ 2,125,712	$ 1,916,452
Net income attributable to Korn Ferry	11,247	84,101	162,035	234,696
Net income attributable to noncontrolling interest	522	956	2,885	3,090
Other (income) loss, net	(13,097)	7,277	(4,824)	(2,236)
Interest expense, net	5,378	7,029	20,088	18,820
Income tax provision	8,463	26,927	63,575	76,951
Operating income	12,513	126,290	243,759	331,321
Depreciation and amortization	17,037	16,104	50,359	47,381
Other income (loss), net	13,097	(7,277)	4,824	2,236
Integration/acquisition costs	2,456	3,214	9,472	4,298
Impairment of fixed assets	4,375	0	4,375	1,915
Impairment of right-of-use assets	5,471	0	5,471	7,392
Restructuring charges, net	41,162	0	41,162	0
Adjusted EBITDA	96,111	138,331	359,422	394,543
Fee revenue
Segment Reporting Information [Line Items]
Total revenue	$ 680,782	$ 680,741	$ 2,104,534	$ 1,905,579