CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues:
Total revenues	[1],[2]	$ 2,676,298	$ 3,155,045	$ 3,702,881
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)		1,139,550	1,287,894	1,496,225
Gross profit		1,536,748	1,867,151	2,206,656
Operating expenses:
Selling and administrative		577,315	558,103	547,559
Engineering and development		418,089	440,591	427,609
Acquired intangible assets amortization		18,999	19,333	21,456
Restructuring and other		21,277	17,185	9,312
Total operating expenses		1,035,680	1,035,212	1,005,936
Income from operations		501,068	831,939	1,200,720
Non-operating (income) expenses:
Interest income		(27,348)	(6,379)	(2,627)
Interest expense		3,806	3,719	17,820
Other (income) expense, net		(962)	(5,786)	24,572
Income before income taxes	[3],[4]	525,572	840,385	1,160,955
Income tax provision		76,820	124,884	146,366
Net income		$ 448,752	$ 715,501	$ 1,014,589
Net income per common share:
Basic		$ 2.91	$ 4.52	$ 6.15
Diluted		$ 2.73	$ 4.22	$ 5.53
Weighted average common shares—basic		154,310	158,434	164,960
Weighted average common shares—diluted		164,304	169,734	183,625
Product [Member]
Revenues:
Total revenues		$ 2,096,286	$ 2,591,572	$ 3,196,575
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)		882,892	1,042,555	1,300,106
Service [Member]
Revenues:
Total revenues		580,012	563,473	506,306
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)		$ 256,658	$ 245,339	$ 196,119

[1] Includes $5.2 million, $8.2 million and $13.2 million in 2023, 2022 and 2021, respectively, for leases of Teradyne’s systems recognized outside of ASC 606: “Revenue from Contracts with Customers.”

[2] Revenues attributable to a country are based on location of customer site.

[3] Included in Corporate and Eliminations are interest income, interest expense, net foreign exchange gains (losses), intercompany eliminations, pension and postretirement plan actuarial gains (losses), legal and environmental fees, contingent consideration adjustments, acquisition and divestiture related expenses, contract termination settlement charge, an expense for the modification of Teradyne's former chief executive officer's outstanding equity awards, and loss on convertible debt conversions in 2021.

[4] Included in income (loss) before taxes are charges and credits related to restructuring and other, inventory charges and loss on convertible debt conversions in 2021.