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Long-Term Debt (Tables)
 12 Months Ended
Dec. 31, 2013
Long-Term Debt.  
Schedule of debt

 The following table summarizes information on the debt (in thousands) as of:

 
   December 31,
2013		  

Convertible Senior Notes due 2020:

        

Fair value of the liability component

   $ 154,737  

Accumulated accretion of discount

     8,369  
       

Net carrying value

   $ 163,106  
       
       

Senior Secured Notes due 2018:

        

Carrying value

   $ 50,000  
       
       

Total Notes:

        

Fair value of the liability component

   $ 204,737  

Accumulated accretion of discount

     8,369  
       

Net carrying amount (Long-term debt)

   $ 213,106