CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive Loss, Net	Total Korn Ferry Stockholders' Equity	Noncontrolling Interest
Beginning Balance at Apr. 30, 2019	$ 1,243,387	$ 656,463	$ 660,845	$ (76,652)	$ 1,240,656	$ 2,731
Beginning Balance, Shares at Apr. 30, 2019		56,431
Net (loss) income	43,650		42,951		42,951	699
Other comprehensive (loss) income	(5,398)			(5,462)	(5,462)	64
Dividends paid to shareholders	(6,081)		(6,081)		(6,081)
Purchase of stock	(21,329)	$ (21,329)			(21,329)
Purchase of stock, shares		(546)
Issuance of stock	5,074	$ 5,074			5,074
Issuance of stock (shares)		711
Stock-based compensation	5,091	$ 5,091			5,091
Ending Balance at Jul. 31, 2019	1,264,394	$ 645,299	697,715	(82,114)	1,260,900	3,494
Ending Balance, Shares at Jul. 31, 2019		56,596
Beginning Balance at Apr. 30, 2019	1,243,387	$ 656,463	660,845	(76,652)	1,240,656	2,731
Beginning Balance, Shares at Apr. 30, 2019		56,431
Net (loss) income	107,638
Ending Balance at Jan. 31, 2020	1,277,653	$ 604,609	749,301	(78,810)	1,275,100	2,553
Ending Balance, Shares at Jan. 31, 2020		55,258
Beginning Balance at Jul. 31, 2019	1,264,394	$ 645,299	697,715	(82,114)	1,260,900	3,494
Beginning Balance, Shares at Jul. 31, 2019		56,596
Net (loss) income	43,032		42,804		42,804	228
Other comprehensive (loss) income	1,352			1,468	1,468	(116)
Dividends paid to shareholders	(5,628)		(5,628)		(5,628)
Dividends to noncontrolling interest	(1,046)					(1,046)
Purchase of stock	(49,325)	$ (49,325)			(49,325)
Purchase of stock, shares		(1,313)
Issuance of stock (shares)		32
Stock-based compensation	5,712	$ 5,712			5,712
Ending Balance at Oct. 31, 2019	1,258,491	$ 601,686	734,891	(80,646)	1,255,931	2,560
Ending Balance, Shares at Oct. 31, 2019		55,315
Net (loss) income	20,956		19,993		19,993	963
Other comprehensive (loss) income	1,930			1,836	1,836	94
Dividends paid to shareholders	(5,583)		(5,583)		(5,583)
Dividends to noncontrolling interest	(1,064)					(1,064)
Purchase of stock	(6,263)	$ (6,263)			(6,263)
Purchase of stock, shares		(157)
Issuance of stock	3,967	$ 3,967			3,967
Issuance of stock (shares)		100
Stock-based compensation	5,219	$ 5,219			5,219
Ending Balance at Jan. 31, 2020	1,277,653	$ 604,609	749,301	(78,810)	1,275,100	2,553
Ending Balance, Shares at Jan. 31, 2020		55,258
Beginning Balance at Apr. 30, 2020	$ 1,223,691	$ 585,560	742,993	(107,172)	1,221,381	2,310
Beginning Balance, Shares at Apr. 30, 2020	54,450	54,450
Net (loss) income	$ (30,855)		(30,833)		(30,833)	(22)
Other comprehensive (loss) income	25,655			25,580	25,580	75
Dividends paid to shareholders	(5,807)		(5,807)		(5,807)
Purchase of stock	(4,442)	$ (4,442)			(4,442)
Purchase of stock, shares		(161)
Issuance of stock	3,966	$ 3,966			3,966
Issuance of stock (shares)		580
Stock-based compensation	5,813	$ 5,813			5,813
Ending Balance at Jul. 31, 2020	1,218,021	$ 590,897	706,353	(81,592)	1,215,658	2,363
Ending Balance, Shares at Jul. 31, 2020		54,869
Beginning Balance at Apr. 30, 2020	$ 1,223,691	$ 585,560	742,993	(107,172)	1,221,381	2,310
Beginning Balance, Shares at Apr. 30, 2020	54,450	54,450
Net (loss) income	$ 48,811
Ending Balance at Jan. 31, 2021	$ 1,294,994	$ 576,798	774,303	(57,914)	1,293,187	1,807
Ending Balance, Shares at Jan. 31, 2021	53,997	53,997
Beginning Balance at Jul. 31, 2020	$ 1,218,021	$ 590,897	706,353	(81,592)	1,215,658	2,363
Beginning Balance, Shares at Jul. 31, 2020		54,869
Net (loss) income	28,078		27,778		27,778	300
Other comprehensive (loss) income	(2,061)			(2,063)	(2,063)	2
Dividends paid to shareholders	(5,607)		(5,607)		(5,607)
Dividends to noncontrolling interest	(1,115)					(1,115)
Purchase of stock	(22,878)	$ (22,878)			(22,878)
Purchase of stock, shares		(757)
Issuance of stock (shares)		41
Stock-based compensation	7,084	$ 7,084			7,084
Ending Balance at Oct. 31, 2020	1,221,522	$ 575,103	728,524	(83,655)	1,219,972	1,550
Ending Balance, Shares at Oct. 31, 2020		54,153
Net (loss) income	51,588		51,319		51,319	269
Other comprehensive (loss) income	25,729			25,741	25,741	(12)
Dividends paid to shareholders	(5,540)		(5,540)		(5,540)
Purchase of stock	(7,779)	$ (7,779)			(7,779)
Purchase of stock, shares		(224)
Issuance of stock	2,594	$ 2,594			2,594
Issuance of stock (shares)		68
Stock-based compensation	6,880	$ 6,880			6,880
Ending Balance at Jan. 31, 2021	$ 1,294,994	$ 576,798	$ 774,303	$ (57,914)	$ 1,293,187	$ 1,807
Ending Balance, Shares at Jan. 31, 2021	53,997	53,997