XML 15 R39.htm IDEA: XBRL DOCUMENT v3.19.3
Debt (Tables)
 9 Months Ended
Sep. 29, 2019
Components of Convertible Senior Notes
The below tables represent the key components of Teradyne’s convertible senior notes:
                 
 
September 29,
2019
 
  
December 31,
2018
 
 
(in thousands)
 
Debt Principal
  $
460,000
    $
460,000
 
Unamortized discount
   
69,058
     
80,019
 
                 
Net Carrying amount of convertible debt
  $
390,942
    $
379,981
 
                 
 
 
 
 
 
 
                                 
 
For the Three Months Ended
   
For the Nine Months Ended
 
 
September 29,
2019
 
  
September 30,
2018
 
  
September 29,
2019
 
  
September 30,
2018
 
 
(in thousands)
 
Contractual interest expense on the coupon
  $
1,438
    $
1,438
    $
4,313
    $
4,313
 
Amortization of the discount component recognized as interest expense
   
3,699
     
3,520
     
10,961
     
10,431
 
                                 
Total interest expense on the convertible debt
  $
5,137
    $
4,958
    $
15,274
    $
14,744