CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 28,078	$ 43,032	$ (2,777)	$ 86,682
Other comprehensive income:
Foreign currency translation adjustments	(2,719)	1,213	22,303	(4,085)
Deferred compensation and pension plan adjustments, net of tax	683	495	1,325	990
Net unrealized loss on marketable securities, net of tax	(25)		(34)
Net unrealized loss on interest rate swap, net of tax		(356)		(951)
Comprehensive income	26,017	44,384	20,817	82,636
Less: comprehensive income attributable to noncontrolling interest	(302)	(112)	(355)	(875)
Comprehensive income attributable to Korn Ferry	$ 25,715	$ 44,272	$ 20,462	$ 81,761