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Debt (Tables)
 6 Months Ended
Jun. 30, 2013
Components of Convertible Senior Notes

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

 

     June 30,
2013		      December 31,
2012		  
     (in thousands)  

Debt principal

    $ 189,998       $ 190,000   

Unamortized debt discount

      12,466         20,104   
  

 

 

     

 

 

  

Net carrying amount of the convertible debt

    $ 177,532       $ 169,896   
  

 

 

     

 

 

  
Interest Expense on Convertible Senior Notes

The interest expense on Teradyne’s convertible senior notes for the three and six months ended June 30, 2013 and July 1, 2012 was as follows:

 

     For the Three Months
Ended		      For the Six Months
Ended		  
     June 30, 
2013		      July 1, 
2012		      June 30, 
2013		      July 1, 
2012		  
     (in thousands)  

Contractual interest expense

    $ 2,137       $ 2,138       $ 4,274       $ 4,299   

Amortization of the discount component and debt issue fees

      4,087         3,592         8,044         7,071   
  

 

 

     

 

 

     

 

 

     

 

 

  

Total interest expense on the convertible debt

    $ 6,224       $ 5,730       $ 12,318       $ 11,370