Debt (Tables)

12 Months Ended

Dec. 31, 2021

Components of Convertible Senior Notes

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

	December 31, 2021		December 31, 2020
	(in thousands)
Debt principal	$	116,980	$	459,971
Unamortized discount		8,554		49,860
Net carrying amount of convertible debt	$	108,426	$	410,111

Reported as follows:

	December 31, 2021		December 31, 2020
	(in thousands)
Current debt	$	19,182	$	33,343
Long-term debt		89,244		376,768
Net carrying amount of convertible debt	$	108,426	$	410,111

	For the years ended
	December 31, 2021		December 31, 2020
	(in thousands)
Contractual interest expense on the coupon	$	3,009	$	5,750
Amortization of the discount component and debt issue fees recognized as interest expense		11,019		15,454
Total interest expense on the convertible debt	$	14,028	$	21,204