CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2020	Jul. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net (loss) income	$ (30,855)	$ 43,650
Other comprehensive income (loss):
Foreign currency translation adjustments	25,022	(5,298)
Deferred compensation and pension plan adjustments, net of tax	642	495
Net unrealized loss on marketable securities, net of tax	(9)
Net unrealized loss on interest rate swap, net of tax		(595)
Comprehensive (loss) income	(5,200)	38,252
Less: comprehensive income attributable to noncontrolling interest	(53)	(763)
Comprehensive (loss) income attributable to Korn Ferry	$ (5,253)	$ 37,489