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Restructuring (Tables)
9 Months Ended
Sep. 30, 2011
Restructuring [Abstract] 
Restructuring And Reorganization Program By Segment
Accrued Liability Associated With Restructurings And Reorganization Programs
                                         
    Balance at                     Balance at        
    December 31,     Costs             September 30,     Due within  
    2010     Accrued     Payments     2011     12 months  
One-time termination benefits to employees — 2010 restructuring and relocation program
  $ 870     $ 389     $ 1,192     $ 67     $ 67  
 
                             
One-time termination benefits to employees — 2011 restructuring program
  $     $ 10,344     $ 5,273     $ 5,071     $ 5,071