Debt (Tables)

3 Months Ended

Apr. 04, 2021

Components of Convertible Senior Notes

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

	April 4, 2021		December 31, 2020
	(in thousands)
Debt principal	$	408,695	$	459,971
Unamortized discount		40,761		49,860
Net carrying amount of convertible debt	$	367,934	$	410,111

Reported as follows:

	April 4, 2021		December 31, 2020
	(in thousands)
Current debt	$	11,057	$	33,343
Long-term debt		356,877		376,768
Net carrying amount of convertible debt	$	367,934	$	410,111

	For the Three Months Ended
	April 4, 2021		March 29, 2020
	(in thousands)
Contractual interest expense on the coupon	$	1,239	$	1,438
Amortization of the discount component and debt issue fees recognized as interest expense		3,836		3,792
Total interest expense on the convertible debt	$	5,075	$	5,230