Summary of Restructuring Liability by Segment (Detail) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2014	Apr. 30, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 8,644	$ 2,813
Executive Recruitment
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	4,361	572
Executive Recruitment | North America
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	925	193
Executive Recruitment | EMEA
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	3,199	379
Executive Recruitment | Asia Pacific
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	9
Executive Recruitment | South America
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	228
LTC
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	2,945	1,587
Futurestep
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	1,292	654
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	46
Severance
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	6,182
Severance | Executive Recruitment
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	3,785
Severance | Executive Recruitment | North America
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	886
Severance | Executive Recruitment | EMEA
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	2,662
Severance | Executive Recruitment | Asia Pacific
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	9
Severance | Executive Recruitment | South America
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	228
Severance | LTC
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	1,529
Severance | Futurestep
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	822
Severance | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	46
Facilities
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	2,462	2,813
Facilities | Executive Recruitment
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	576	572
Facilities | Executive Recruitment | North America
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	39	193
Facilities | Executive Recruitment | EMEA
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	537	379
Facilities | LTC
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	1,416	1,587
Facilities | Futurestep
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 470	$ 654