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Schedule of Income (Loss) Before Income Taxes (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Income Tax Disclosure [Abstract] |  |  |  |
U.S. |  | $ 231,346 | $ 307,997 | $ 385,968
Non-U.S. |  | 377,740 | 217,575 | 454,417
Income before income taxes | [1] | $ 609,086 | $ 525,572 | $ 840,385
[1] | Included in Corporate and Eliminations are interest income, interest expense, net foreign exchange gains (losses), intercompany eliminations, acquired intangible amortization, gain on the sale of a business, pension and postretirement plan actuarial gains (losses), legal and environmental fees, contingent consideration adjustments, acquisition and divestiture related expenses, contract termination settlement charge, and an expense for the modification of Teradyne's former chief executive officer's outstanding equity awards.

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