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Summary of Restructuring Liability by Segment (Detail) (USD $)
In Thousands, unless otherwise specified
Oct. 31, 2012
Jul. 31, 2012
Apr. 30, 2012
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve $ 16,501 $ 2,231 $ 2,770
North America
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 5,593   43
EMEA
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 5,680   1,818
Asia Pacific
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 551    
Total Executive Recruitment
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 11,824   1,861
Leadership and Talent Consulting Services
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 364    
Futurestep
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 3,436   909
Corporate
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 877    
Severance
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 9,238 37 38
Severance | North America
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 2,208    
Severance | EMEA
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 3,367   38
Severance | Asia Pacific
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 426    
Severance | Total Executive Recruitment
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 6,001   38
Severance | Leadership and Talent Consulting Services
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 364    
Severance | Futurestep
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 1,996    
Severance | Corporate
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 877    
Facilities
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 7,263 2,194 2,732
Facilities | North America
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 3,385   43
Facilities | EMEA
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 2,313   1,780
Facilities | Asia Pacific
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 125    
Facilities | Total Executive Recruitment
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 5,823   1,823
Facilities | Futurestep
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve $ 1,440   $ 909