CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2024	Apr. 02, 2023
Revenues:
Total revenues	[1]	$ 599,819	$ 617,529
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)		260,537	261,109
Gross profit		339,282	356,420
Operating expenses:
Selling and administrative		149,188	150,955
Engineering and development		103,199	105,762
Acquired intangible assets amortization		4,697	4,802
Restructuring and other		4,427	2,037
Total operating expenses		261,511	263,556
Income from operations		77,771	92,864
Non-operating (income) expense:
Interest income		(7,867)	(5,258)
Interest expense		661	987
Other (income) expense, net		12,075	51
Income before income taxes	[2],[3]	72,902	97,084
Income tax provision		8,705	13,553
Net income		$ 64,197	$ 83,531
Net income per common share:
Basic		$ 0.42	$ 0.54
Diluted		$ 0.4	$ 0.5
Weighted average common shares—basic		153,047	155,904
Weighted average common shares—diluted		162,348	166,308
Product [Member]
Revenues:
Total revenues		$ 458,433	$ 473,418
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)		200,763	198,665
Service [Member]
Revenues:
Total revenues		141,386	144,111
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)		$ 59,774	$ 62,444

[1] Includes $0.9 million and $1.3 million in the three months ended March 31, 2024 and in the three months ended April 2, 2023, respectively, for leases of Teradyne’s systems recognized outside Accounting Standards Codification (“ASC”) 606 “Revenue from Contracts with Customers.”

[2] Included in Corporate and Eliminations are: interest income, interest expense, net foreign exchange gains (losses), intercompany eliminations, severance charges, pension, acquisition and divestiture related fees, and an expense for the modification of outstanding equity awards.

[3] Included in income (loss) before taxes are charges related to restructuring and other, expense for the modification of outstanding equity awards, and inventory charges.