CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2018	Jul. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net (loss) income	$ (38,592)	$ 29,429
Other comprehensive (loss) income:
Foreign currency translation adjustments	(14,556)	16,189
Deferred compensation and pension plan adjustments, net of tax	273	352
Net unrealized gain (loss) on interest rate swap, net of tax	133	(63)
Comprehensive (loss) income	(52,742)	45,907
Less: comprehensive income attributable to noncontrolling interest	(25)	(493)
Comprehensive (loss) income attributable to Korn/Ferry International	$ (52,767)	$ 45,414