Debt (Tables)

9 Months Ended

Oct. 03, 2021

Components of Convertible Senior Notes

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

	October 3, 2021		December 31, 2020
	(in thousands)
Debt principal	$	157,972	$	459,971
Unamortized discount		12,969		49,860
Net Carrying amount of convertible debt	$	145,003	$	410,111

Reported as follows:

	October 3, 2021		December 31, 2020
	(in thousands)
Current debt	$	32,219	$	33,343
Long-term debt		112,784		376,768
Net carrying amount of convertible debt	$	145,003	$	410,111

	For the Three Months Ended				For the Nine Months Ended
	October 3, 2021		September 27, 2020		October 3, 2021		September 27, 2020
	(in thousands)
Contractual interest expense on the coupon	$	355	$	1,438	$	2,666	$	4,313
Amortization of the discount component and debt issue fees recognized as interest expense		2,424		3,887		9,771		11,518
Total interest expense on the convertible debt	$	2,779	$	5,325	$	12,437	$	15,831