Interest Expense on Teradyne's Senior Notes (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Apr. 02, 2023
Debt Instrument
Contractual interest expense on the coupon	$ 0	$ 138
Amortization of debt issuance fees recognized as interest expense	0	113
Total interest expense on the convertible debt	$ 0	$ 251