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Schedule of Revenues by Country (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues [1],[2] $ 2,819,880 $ 2,676,298 $ 3,155,045
KOREA      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues [2] 695,669 394,690 544,816
TAIWAN      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues [2] 601,997 384,842 626,424
CHINA      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues [2] 375,186 314,899 491,798
UNITED STATES      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues [2] 374,333 433,661 469,948
Europe      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues [2] 251,285 273,784 268,384
JAPAN      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues [2] 159,827 281,742 162,920
SINGAPORE      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues [2] 90,113 116,969 99,503
MALAYSIA      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues [2] 62,376 89,197 142,203
PHILIPPINES      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues [2] 53,636 189,419 124,107
THAILAND      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues [2] 49,268 91,818 137,356
Rest Of The World      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues [2] $ 106,190 $ 105,277 $ 87,586
[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.