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Debt (Tables)
9 Months Ended
Oct. 01, 2017
Components of Convertible Senior Notes

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

 

     October 1, 2017      December 31, 2016  
     (in thousands)  

Debt principal

   $ 460,000      $ 460,000  

Unamortized discount

     97,405        107,331  
  

 

 

    

 

 

 

Net carrying amount of convertible debt

   $ 362,595      $ 352,669  
  

 

 

    

 

 

 

 

    For the Three Months
Ended
    For the Nine Months
Ended
 
    October 1, 2017     October 1, 2017  
    (in thousands)  

Contractual interest expense on the coupon

  $ 1,422     $ 4,297  

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

    3,350       9,926  
 

 

 

   

 

 

 

Total interest expense on the convertible debt

  $ 4,772     $ 14,223