CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues:
Total revenues	[1],[2]	$ 2,819,880	$ 2,676,298	$ 3,155,045
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)		1,170,953	1,139,550	1,287,894
Gross profit		1,648,927	1,536,748	1,867,151
Operating expenses:
Selling and administrative		617,047	577,315	558,103
Engineering and development		460,876	418,089	440,591
Acquired intangible assets amortization		18,764	18,999	19,333
Restructuring and other		15,571	21,277	17,185
Gain on sale of business		(57,119)	0	0
Total operating expenses		1,055,139	1,035,680	1,035,212
Income from operations		593,788	501,068	831,939
Non-operating (income) expenses:
Interest income		(24,772)	(27,348)	(6,379)
Interest expense		3,587	3,806	3,719
Other (income) expense, net		5,887	(962)	(5,786)
Income before income taxes and equity in net earnings of affiliate		609,086	525,572	840,385
Income tax provision		59,503	76,820	124,884
Income before equity in net earnings of affiliate		549,583	448,752	715,501
Equity in net earnings of affiliate		(7,211)	0	0
Net income		$ 542,372	$ 448,752	$ 715,501
Net income per common share:
Basic		$ 3.41	$ 2.91	$ 4.52
Diluted		$ 3.32	$ 2.73	$ 4.22
Weighted average common shares—basic		159,083	154,310	158,434
Weighted average common shares—diluted		163,314	164,304	169,734
Product [Member]
Revenues:
Total revenues		$ 2,294,935	$ 2,096,286	$ 2,591,572
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)		960,888	882,892	1,042,555
Service [Member]
Revenues:
Total revenues		524,945	580,012	563,473
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)		$ 210,065	$ 256,658	$ 245,339

[1] Includes $3.7 million, $5.2 million and $8.2 million in 2024, 2023 and 2022, 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.