CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 43,650	$ (38,592)
Other comprehensive income (loss):
Foreign currency translation adjustments	(5,298)	(14,556)
Deferred compensation and pension plan adjustments, net of tax	495	273
Net unrealized (loss) gain on interest rate swap, net of tax	(595)	133
Comprehensive income (loss)	38,252	(52,742)
Less: comprehensive income attributable to noncontrolling interest	(763)	(25)
Comprehensive income (loss) attributable to Korn Ferry	$ 37,489	$ (52,767)