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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2013
Fair Value Disclosures [Abstract]  
Rollforward of the Fair Value as Determined by Level 3

       The following table provides a rollforward of the fair value, as determined by Level 3 inputs: 

   Nine months
ended
September 30,
 
     2013  

Beginning balance

   $ —     

Additions

     35   

Change in fair value included in earnings

     —     
  

 

 

 

Ending Balance

   $ 35