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Debt (Tables)
6 Months Ended
Jul. 04, 2021
Components of Convertible Senior Notes
The below tables represent the key components of Teradyne’s convertible senior notes:
 
    
July 4,

2021
    
December 31,

2020
 
    
(in thousands)
 
Debt principal
   $ 393,142      $ 459,971  
Unamortized discount
     35,763        49,860  
    
 
 
    
 
 
 
Net carrying amount of convertible debt
   $ 357,379      $ 410,111  
    
 
 
    
 
 
 
Reported as follows:
 
    
July 4,

2021
    
December 31,
2020
 
    
(in thousands)
 
Current debt
   $ 213,761      $ 33,343  
Long-term debt
     143,618        376,768  
    
 
 
    
 
 
 
Net carrying amount of convertible debt
   $ 357,379      $ 410,111  
    
 
 
    
 
 
 
 
    
For the Three Months Ended
    
For the Six Months Ended
 
    
July 4,

2021
    
June 28,

2020
    
July 4,

2021
    
June 28,

2020
 
    
(in thousands)
 
Contractual interest expense on the coupon
   $ 1,072      $ 1,438      $ 2,311      $ 2,875  
Amortization of the discount component and debt issue fees recognized as interest expense
     3,511        3,839        7,347        7,631  
    
 
 
    
 
 
    
 
 
    
 
 
 
Total interest expense on the convertible debt
   $ 4,583      $ 5,277      $ 9,658      $ 10,506