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Severance and Other Charges (Tables)
 6 Months Ended
Jun. 30, 2015
Restructuring and Related Activities [Abstract]  
Summary of Activity Related to Accrued Severance Charges

A summary of the activity related to the accrued severance charges, is as follows (in thousands):

 

Balance as of December 31, 2014

    $  1,904  

Payments

      (591 ) 
  

 

 

  

Balance as of March 31, 2015

      1,313  

Payments

      (571 ) 
  

 

 

  

Balance as of June 30, 2015

    $ 742