CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Apr. 02, 2023	Apr. 03, 2022
Revenues:
Total revenues	[1]	$ 617,529	$ 755,370
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)		261,109	300,437
Gross profit		356,420	454,933
Operating expenses:
Selling and administrative		150,955	140,185
Engineering and development		105,762	108,116
Acquired intangible assets amortization		4,802	5,063
Restructuring and other		2,037	15,714
Total operating expenses		263,556	269,078
Income from operations		92,864	185,855
Non-operating (income) expense:
Interest income		(5,258)	(703)
Interest expense		987	1,012
Other (income) expense, net		51	5,187
Income before income taxes	[2],[3]	97,084	180,359
Income tax provision		13,553	18,431
Net income		$ 83,531	$ 161,928
Net income per common share:
Basic		$ 0.54	$ 1
Diluted		$ 0.5	$ 0.92
Weighted average common shares—basic		155,904	162,048
Weighted average common shares—diluted		166,308	175,575
Product [Member]
Revenues:
Total revenues		$ 473,418	$ 625,875
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)		198,665	243,016
Service [Member]
Revenues:
Total revenues		144,111	129,495
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)		$ 62,444	$ 57,421

[1] Includes $1.3 million and $2.3 million in 2023 and 2022, 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, legal and environmental fees, severance charges, acquisition related charges and compensation and an expense for the modification of Teradyne’s former chief executive officer’s outstanding equity awards.

[3] Included in income (loss) before taxes are charges related to restructuring and other, and inventory charges.