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Special Charges (Schedule Of Special Charges By Segment) (Details) (USD $)
In Thousands
9 Months Ended12 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Dec. 31, 2010
Special charges$ 15,212$ 29,356[1]$ 51,100
Corporate Finance/Restructuring [Member]
   
Special charges9,440  
Forensic And Litigation Consulting [Member]
   
Special charges839  
Economic Consulting [Member]
   
Special charges2,093  
Total Excluding Unallocated Corporate [Member]
   
Special charges12,372  
Unallocated Corporate [Member]
   
Special charges$ 2,840  
[1]As Revised (Note 2)