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Schedule of Segment Reporting Information by Segment Charges (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Apr. 02, 2023
Segment Reporting Information [Line Items] |  |
Restructuring and other—employee severance | $ 4,427 | $ 2,037
Semiconductor Test |  |
Segment Reporting Information [Line Items] |  |
Cost of revenues—inventory charge | 4,956 | 3,768
Restructuring and other—employee severance | 983 | 794
System Test |  |
Segment Reporting Information [Line Items] |  |
Cost of revenues—inventory charge | 0 | 675
Robotics |  |
Segment Reporting Information [Line Items] |  |
Cost of revenues—inventory charge | 0 | 782
Corporate And Eliminations |  |
Segment Reporting Information [Line Items] |  |
Restructuring and other-acquisition & divestiture related expenses | 2,214 | 0
Selling and administrative-equity modification | 1,469 | 5,889
Restructuring and other—employee severance | $ 0 | $ 659

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- Definition Cost of revenues-provision for excess and obsolete inventory. + References No definition available. + Details
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Namespace Prefix: | ter_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Selling and administrative equity modification charge. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479405/805-10-25-23 + Details
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- Definition Amount of restructuring charges, remediation cost, and asset impairment loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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- Details
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