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Restructuring and Impairment Charges (Tables)
6 Months Ended
Jun. 30, 2012
Restructuring and Impairment Charges [Abstract]  
The restructuring charges for severance-related costs and termination of contractual obligations
                                 
    Three Months Ended
June 30,
    Six Months Ended
June 30,
 
    2012     2011     2012     2011  

Beginning restructuring liability

  $ 46     $ —       $ 931     $ —    

Severance and termination charges incurred

    —         —         —         —    

Severance and termination disbursements

    (33 )      —         (918 )      —    
   

 

 

   

 

 

   

 

 

   

 

 

 

Ending restructuring liability

  $ 13     $ —       $ 13     $ —