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Disaggregated Revenue by Primary Geographical Market, Major Product Line and Timing of Revenue Recognition (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disaggregation of Revenue [Line Items]      
Total [1],[2] $ 2,819,880 $ 2,676,298 $ 3,155,045
Reportable Segments      
Disaggregation of Revenue [Line Items]      
Total [1] 2,488,768 2,332,371 2,753,741
All Other      
Disaggregation of Revenue [Line Items]      
Total [1] 331,112 343,927 401,053
Corporate and Eliminations      
Disaggregation of Revenue [Line Items]      
Total [1]     251
Point in Time      
Disaggregation of Revenue [Line Items]      
Total [1] 2,414,485 2,259,315 2,772,622
Point in Time | Reportable Segments      
Disaggregation of Revenue [Line Items]      
Total [1] 2,147,530 1,976,757 2,430,176
Point in Time | All Other      
Disaggregation of Revenue [Line Items]      
Total [1] 266,955 282,558 342,195
Point in Time | Corporate and Eliminations      
Disaggregation of Revenue [Line Items]      
Total [1]     251
Over Time      
Disaggregation of Revenue [Line Items]      
Total [1] 405,395 416,983 382,423
Over Time | Reportable Segments      
Disaggregation of Revenue [Line Items]      
Total [1] 341,238 355,614 323,565
Over Time | All Other      
Disaggregation of Revenue [Line Items]      
Total [1] 64,157 61,369 58,858
Americas      
Disaggregation of Revenue [Line Items]      
Total [1] 435,383 479,396 475,619
Americas | Reportable Segments      
Disaggregation of Revenue [Line Items]      
Total [1] 261,299 280,097 285,262
Americas | All Other      
Disaggregation of Revenue [Line Items]      
Total [1] 174,084 199,299 190,106
Americas | Corporate and Eliminations      
Disaggregation of Revenue [Line Items]      
Total [1]     251
Europe, Middle East and Africa      
Disaggregation of Revenue [Line Items]      
Total [1] 256,799 303,891 279,515
Europe, Middle East and Africa | Reportable Segments      
Disaggregation of Revenue [Line Items]      
Total [1] 213,034 262,563 236,956
Europe, Middle East and Africa | All Other      
Disaggregation of Revenue [Line Items]      
Total [1] 43,765 41,328 42,559
Asia Pacific      
Disaggregation of Revenue [Line Items]      
Total [1] 2,127,698 1,893,011 2,399,911
Asia Pacific | Reportable Segments      
Disaggregation of Revenue [Line Items]      
Total [1] 2,014,435 1,789,711 2,231,523
Asia Pacific | All Other      
Disaggregation of Revenue [Line Items]      
Total [1] 113,263 103,300 168,388
SOC | Semiconductor Test      
Disaggregation of Revenue [Line Items]      
Total [1] 1,537,124 1,432,621 1,706,884
SOC | Point in Time | Semiconductor Test      
Disaggregation of Revenue [Line Items]      
Total [1] 1,255,579 1,141,882 1,445,238
SOC | Over Time | Semiconductor Test      
Disaggregation of Revenue [Line Items]      
Total [1] 281,545 290,739 261,646
SOC | Americas | Semiconductor Test      
Disaggregation of Revenue [Line Items]      
Total [1] 92,386 117,728 122,575
SOC | Europe, Middle East and Africa | Semiconductor Test      
Disaggregation of Revenue [Line Items]      
Total [1] 44,589 100,571 69,345
SOC | Asia Pacific | Semiconductor Test      
Disaggregation of Revenue [Line Items]      
Total [1] 1,400,149 1,214,322 1,514,964
Memory | Semiconductor Test      
Disaggregation of Revenue [Line Items]      
Total [1] 501,788 386,015 373,706
Memory | Point in Time | Semiconductor Test      
Disaggregation of Revenue [Line Items]      
Total [1] 472,279 356,417 344,693
Memory | Over Time | Semiconductor Test      
Disaggregation of Revenue [Line Items]      
Total [1] 29,509 29,598 29,013
Memory | Americas | Semiconductor Test      
Disaggregation of Revenue [Line Items]      
Total [1] 15,017 11,367 11,987
Memory | Europe, Middle East and Africa | Semiconductor Test      
Disaggregation of Revenue [Line Items]      
Total [1] 20,557 8,497 1,543
Memory | Asia Pacific | Semiconductor Test      
Disaggregation of Revenue [Line Items]      
Total [1] 466,214 366,151 360,176
IST | Semiconductor Test      
Disaggregation of Revenue [Line Items]      
Total [1] 85,008 138,552 270,013
IST | Point in Time | Semiconductor Test      
Disaggregation of Revenue [Line Items]      
Total [1] 63,288 115,220 248,919
IST | Over Time | Semiconductor Test      
Disaggregation of Revenue [Line Items]      
Total [1] 21,720 23,332 21,094
IST | Americas | Semiconductor Test      
Disaggregation of Revenue [Line Items]      
Total [1] 6,289 3,050 3,284
IST | Asia Pacific | Semiconductor Test      
Disaggregation of Revenue [Line Items]      
Total [1] 78,719 135,502 266,729
Universal Robots (UR) | Robotics      
Disaggregation of Revenue [Line Items]      
Total [1] 364,848 375,183 403,138
Universal Robots (UR) | Point in Time | Robotics      
Disaggregation of Revenue [Line Items]      
Total [1] 356,384 363,238 391,326
Universal Robots (UR) | Over Time | Robotics      
Disaggregation of Revenue [Line Items]      
Total [1] 8,464 11,945 11,812
Universal Robots (UR) | Americas | Robotics      
Disaggregation of Revenue [Line Items]      
Total [1] 147,607 147,952 147,416
Universal Robots (UR) | Europe, Middle East and Africa | Robotics      
Disaggregation of Revenue [Line Items]      
Total [1] 147,888 153,495 166,068
Universal Robots (UR) | Asia Pacific | Robotics      
Disaggregation of Revenue [Line Items]      
Total [1] $ 69,353 $ 73,736 $ 89,654
[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.