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Restructuring Expense (Tables)
3 Months Ended
Mar. 31, 2012
Restructuring Expense  
Activity related to the restructuring liability
  Three Months Ended March 31,  
 
  2012   2011  
 
  (in thousands)
 

Liability, beginning of the period

  $ 26,313   $ 29,595  

Cash payments

    (3,686 )   (3,736 )

Cash received from subleases

    2,486     2,195  

Restructuring expense

    360     760  
           

Liability, end of the period

  $ 25,473   $ 28,814