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Restructuring (Tables)
9 Months Ended
Sep. 30, 2012
Restructuring [Abstract]  
Changes in the liability and the balance related restructuring plan
         
    Nine Months Ending
September 30, 2012
 
    (in thousands)  

Balance at December 31, 2011

  $ 828  

Restructuring charge for severance

    —    

Severance payments

    (579
   

 

 

 

Balance at September 30, 2012

  $ 249