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Schedule of Segment Reporting Information by Segment Charges (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jul. 02, 2023 | Jun. 30, 2024 | Jul. 02, 2023
Segment Reporting Information [Line Items] |  |  |  |
Restructuring and other—employee severance | $ 2,012 | $ 6,358 | $ 6,440 | $ 8,395
Semiconductor Test |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Cost of revenues—inventory charge | 2,408 | 4,184 | 7,364 | 7,952
Restructuring and other—employee severance | 0 | 2,485 | 1,130 | 3,279
System Test |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Cost of revenues—inventory charge | 0 | 0 | 720 | 1,113
Restructuring and other—employee severance | 0 | 0 | 0 | 642
Robotics |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Cost of revenues—inventory charge | 0 | 769 | 534 | 1,551
Restructuring and other—employee severance | 1,308 | 1,638 | 1,537 | 2,071
Wireless Test |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Cost of revenues—inventory charge | 0 | 0 | 820 | 725
Corporate And Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Restructuring and other-acquisition & divestiture related expenses | 0 | 0 | 2,214 | 0
Selling and administrative-equity modification | 0 | 0 | 1,469 | 5,889
Restructuring and other—other | 0 | 1,100 | 0 | 1,100
Restructuring and other—employee severance | $ 0 | $ 0 | $ 0 | $ 1,124

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

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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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Balance Type: | debit
Period Type: | duration

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- Definition Amount of other expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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Balance Type: | debit
Period Type: | duration

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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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Data Type: | xbrli:monetaryItemType
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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