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Special Charges By Segment (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Special Charges [Line Items]        
Special charges $ 26,782 $ 15,212 $ 26,782 $ 15,212
Corporate Finance / Restructuring
       
Special Charges [Line Items]        
Special charges     11,116  
Forensic And Litigation Consulting
       
Special Charges [Line Items]        
Special charges     7,253  
Economic Consulting
       
Special Charges [Line Items]        
Special charges     818  
Technology
       
Special Charges [Line Items]        
Special charges     2,966  
Strategic Communications
       
Special Charges [Line Items]        
Special charges     4,511  
Total Reportable Segments
       
Special Charges [Line Items]        
Special charges     26,664  
Unallocated Corporate
       
Special Charges [Line Items]        
Special charges     $ 118