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Debt (Tables)
12 Months Ended
Dec. 31, 2015
Components of Convertible Senior Notes
     For the year ended  
     December 31,
2015
     December 31,
2014
 
     (in thousands)  

Contractual interest expense on the coupon

   $ —         $ 1,757   

Amortization of the discount component and debt issue fees recognized as interest expense

     —           4,493   
  

 

 

    

 

 

 

Total interest expense on the convertible debt

   $ —         $ 6,250