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Summary of Restructuring Liability by Segment (Detail) (USD $)
In Thousands, unless otherwise specified
Oct. 31, 2013
Jul. 31, 2013
Apr. 30, 2013
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve $ 5,571 $ 9,825 $ 11,548
Corporate
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 45   449
Executive Recruitment
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 1,348   3,180
Executive Recruitment | North America
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 636   1,577
Executive Recruitment | EMEA
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 712   1,534
Executive Recruitment | Asia Pacific
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve     69
LTC
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 3,075   6,453
Futurestep
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 1,103   1,466
Severance
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 584 2,706 4,819
Severance | Corporate
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 45   449
Severance | Executive Recruitment
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 220   1,596
Severance | Executive Recruitment | North America
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 201   918
Severance | Executive Recruitment | EMEA
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 19   678
Severance | LTC
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 319   2,497
Severance | Futurestep
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve     277
Facilities
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 4,987 7,119 6,729
Facilities | Executive Recruitment
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 1,128   1,584
Facilities | Executive Recruitment | North America
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 435   659
Facilities | Executive Recruitment | EMEA
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 693   856
Facilities | Executive Recruitment | Asia Pacific
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve     69
Facilities | LTC
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 2,756   3,956
Facilities | Futurestep
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve $ 1,103   $ 1,189