Annual report pursuant to Section 13 and 15(d)

Summary of Restructuring Liability by Segment (Detail)

v2.4.0.6
Summary of Restructuring Liability by Segment (Detail) (USD $)
In Thousands, unless otherwise specified
Apr. 30, 2013
Apr. 30, 2012
Apr. 30, 2011
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve $ 11,548 $ 2,770 $ 4,921
Corporate
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 449    
Executive Recruitment
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 3,180 1,861  
Executive Recruitment | North America
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 1,577 43  
Executive Recruitment | EMEA
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 1,534 1,818  
Executive Recruitment | Asia Pacific
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 69    
LTC
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 6,453    
Futurestep
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 1,466 909  
Severance
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 4,819 38 978
Severance | Corporate
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 449    
Severance | Executive Recruitment
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 1,596 38  
Severance | Executive Recruitment | North America
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 918    
Severance | Executive Recruitment | EMEA
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 678 38  
Severance | LTC
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 2,497    
Severance | Futurestep
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 277    
Facilities
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 6,729 2,732 3,943
Facilities | Executive Recruitment
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 1,584 1,823  
Facilities | Executive Recruitment | North America
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 659 43  
Facilities | Executive Recruitment | EMEA
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 856 1,780  
Facilities | Executive Recruitment | Asia Pacific
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 69    
Facilities | LTC
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 3,956    
Facilities | Futurestep
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve $ 1,189 $ 909