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Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands | Jan. 01, 2022 | Oct. 02, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Summary Of Significant Accounting Policies [Line Items] |  |  |
Debt |  | $ 50,195 | $ 89,244
Retained earnings |  | 572,652 | 736,566
Mezzanine equity |  |  | 1,512
Additional paid-in capital |  | $ 1,746,779 | $ 1,811,545
Increase Decrease in deferred tax assets | $ 1,800 |  |
Teradyne Member [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Current debt, | 1,400 |  |
Debt | 6,600 |  |
Retained earnings | 94,600 |  |
Mezzanine equity | 100,800 |  |
Additional paid-in capital | 100,800 |  |
Teradyne Member [Member] | Accounting Standards Update 2020-06 [Member] | Revision of Prior Period, Accounting Standards Update, Adjustment [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Mezzanine equity | $ 0 |  |

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