CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended				9 Months Ended
		Oct. 02, 2022		Oct. 03, 2021		Oct. 02, 2022		Oct. 03, 2021
Revenues:
Total revenues		$ 827,073	[1]	$ 950,501	[1]	$ 2,423,209	[2]	$ 2,817,835
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)		341,694		379,500		976,508		1,138,227
Gross profit		485,379		571,001		1,446,701		1,679,608
Operating expenses:
Selling and administrative		135,632		134,829		415,351		404,812
Engineering and development		111,715		107,220		331,781		317,644
Acquired intangible assets amortization		4,729		5,355		14,663		16,293
Restructuring and other		1,796		1,197		19,554		(3,426)
Total operating expenses		253,872		248,601		781,349		735,323
Income from operations		231,507		322,400		665,352		944,285
Non-operating (income) expense:
Interest income		(1,318)		(626)		(2,972)		(2,066)
Interest expense		779		3,785		2,704		15,354
Other (income) expense, net		5,849		21,486		20,472		25,223
Income before income taxes	[3],[4]	226,197		297,755		645,148		905,774
Income tax provision		42,712		41,037		101,948		115,225
Net income		$ 183,485		$ 256,718		$ 543,200		$ 790,549
Net income per common share:
Basic		$ 1.17		$ 1.56		$ 3.41		$ 4.77
Diluted		$ 1.1		$ 1.41		$ 3.17		$ 4.26
Weighted average common shares—basic		156,364		164,583		159,325		165,690
Weighted average common shares—diluted		166,733		181,987		171,156		185,492
Product [Member]
Revenues:
Total revenues		$ 676,252		$ 825,448		$ 2,000,081		$ 2,437,901
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)		277,539		333,229		795,229		989,859
Service [Member]
Revenues:
Total revenues		150,821		125,053		423,128		379,934
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)		$ 64,155		$ 46,271		$ 181,279		$ 148,368

[1] Includes $3.8 million and $3.8 million in 2022 and 2021, respectively, for leases of Teradyne’s systems recognized outside Accounting Standards Codification (“ASC”) 606 “Revenue from Contracts with Customers.”

[2] Includes $11.1 million and $11.1 million in 2022 and 2021, respectively, for leases of Teradyne’s systems recognized outside ASC 606 “Revenue from Contracts with Customers.”

[3] Included in Corporate and Eliminations are: legal and environmental fees, contingent consideration fair value adjustments, interest income, interest expense, severance charges, net foreign exchange gains (losses), acquisition related charges and compensation, pension, intercompany eliminations and for the three and nine months ended October 3, 2021, loss on convertible debt conversions.

[4] Included in income (loss) before taxes are charges and credits related to restructuring and other, inventory charges and, for the three and nine months ended October 3, 2021, loss on convertible debt conversions.