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Debt (Tables)
 12 Months Ended
Dec. 31, 2014
Debt

At December 31, 2014 and 2013, debt consisted of the following:

 

         2014          2013  
     (in thousands)  

Convertible senior notes

    $ —         $ 185,708   

Japan loan

      —           955   
  

 

 

     

 

 

  

Total debt

      —           186,663   

Current portion of long-term debt

      —           186,663   
  

 

 

     

 

 

  

Long-term debt

    $ —         $ —     
  

 

 

     

 

 

  
Components of Convertible Senior Notes

The below tables represent the key components of Teradyne’s convertible senior notes:

 

     December 31,
2014		      December 31,
2013		  
     (in thousands)  

Debt principal

    $ —         $ 189,998   

Unamortized discount

      —           4,290   
  

 

 

     

 

 

  

Net carrying amount of the convertible debt

    $ —         $ 185,708   
  

 

 

     

 

 

  

 

     For the year ended  
     December 31,
2014		      December 31,
2013		  
     (in thousands)  

Contractual interest expense on the coupon

    $ 1,757       $ 8,550   

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

      4,493         16,628   
  

 

 

     

 

 

  

Total interest expense on the convertible debt

    $ 6,250       $ 25,178