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Restructuring Charges (Tables)
6 Months Ended
Jun. 30, 2012
Restructuring Charges [Abstract]  
Summary of restructuring reserve
                         
    Employee
Separation
Costs
    Contract
Termination
Costs
    Total  

Balance at December 31, 2011

  $ 20     $ 2,298     $ 2,318  

Liabilities recognized

    —         —         —    

Payments

    (20     (291     (311
   

 

 

   

 

 

   

 

 

 

Balance at March 31, 2012

    —         2,007       2,007  

Liabilities recognized

    —         —         —    

Payments

    —         (294     (294
   

 

 

   

 

 

   

 

 

 

Balance at June 30, 2012

  $ —       $ 1,713     $ 1,713