CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 47,317	$ 36,732	$ 8,725	$ 66,161
Other comprehensive income (loss):
Foreign currency translation adjustments	(12,778)	(4,255)	(27,334)	11,934
Deferred compensation and pension plan adjustments, net of tax	273	352	546	704
Net unrealized gain on interest rate swap, net of tax	145	456	278	393
Comprehensive income (loss)	34,957	33,285	(17,785)	79,192
Less: comprehensive income attributable to noncontrolling interest	(1,016)	(165)	(1,041)	(658)
Comprehensive income (loss) attributable to Korn/Ferry International	$ 33,941	$ 33,120	$ (18,826)	$ 78,534