XML 50 R83.htm IDEA: XBRL DOCUMENT
v3.3.0.814

Schedule of Segment Reporting Information by Segment Charges (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 04, 2015 | Sep. 28, 2014 | Mar. 30, 2014 | Oct. 04, 2015 | Sep. 28, 2014
Segment Reporting Information [Line Items] |  |  |  |  |  |
Restructuring and other |  | $ 261 | $ (405) |  | $ (124) | $ 167
Contingent consideration adjustment |  |  |  |  | (2,600) | (630)
Gain from the sale of an equity investment |  |  |  |  | (5,406) |
Stock based compensation expense |  |  |  | $ 6,600 |  |
ZTEC Instruments, Inc. |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Contingent consideration adjustment |  |  | (600) |  | (1,600) | (600)
Universal Robots |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Acquisition related costs |  | 100 |  |  | 1,100 |
Avionics Interface Technologies, LLC |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Contingent consideration adjustment |  | (1,000) |  |  | (1,000) |
Wireless Test |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Cost of revenues-inventory charge |  | 901 | 1,267 |  | 2,077 | 5,239
Restructuring and other |  |  |  |  |  | 426
Total |  | 901 | 1,267 |  | 2,077 | 5,665
System Test |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Cost of revenues-inventory charge |  | 460 | 763 |  | 8,225 | 1,944
Restructuring and other |  | 923 | 225 |  | 923 | 371
Total |  | 1,383 | 988 |  | 9,148 | 2,315
Industrial Automation |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Cost of revenues-inventory step-up | [1] | 972 |  |  | 1,567 |
Total |  | 972 |  |  | 1,567 |
Semiconductor Test |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Cost of revenues-inventory charge |  | 1,697 | 4,404 |  | 8,637 | 14,322
Restructuring and other |  | 194 |  |  | 499 |
Total |  | 1,891 | 4,404 |  | 9,136 | 14,322
Corporate And Eliminations |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Total |  | (856) | (630) |  | (6,902) | 5,968
Corporate And Eliminations | Other (income) expense, net |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Gain from the sale of an equity investment |  |  |  |  | (5,406) |
Corporate And Eliminations | Selling, General and Administrative Expenses |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Stock based compensation expense | [2] |  |  |  |  | 6,598
Corporate And Eliminations | ZTEC Instruments, Inc. |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Contingent consideration adjustment |  |  |  |  | (1,600) |
Corporate And Eliminations | ZTEC Instruments, Inc. | Restructuring and other |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Contingent consideration adjustment |  |  | $ (630) |  | (1,600) | $ (630)
Corporate And Eliminations | Universal Robots | Restructuring and other |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Acquisition related costs |  | 144 |  |  | 1,104 |
Corporate And Eliminations | Avionics Interface Technologies, LLC |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Contingent consideration adjustment |  |  |  |  | (1,000) |
Corporate And Eliminations | Avionics Interface Technologies, LLC | Restructuring and other |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Contingent consideration adjustment |  | $ (1,000) |  |  | $ (1,000) |
[1] | Included in the cost of revenues for the three and nine months ended October 4, 2015 is the cost for purchase accounting inventory step-up.
[2] | Expense related to the January 2014 retirement of Teradyne's former chief executive officer; see Note J: "Stock-Based Compensation."

X
- Definition Cost of Revenues-Inventory Step-Up + References No definition available. + Details
Name: | ter_CostOfRevenuesInventoryStepUp
Namespace Prefix: | ter_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition Segment reporting information segment charges. + References No definition available. + Details
Name: | ter_SegmentReportingInformationSegmentCharges
Namespace Prefix: | ter_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e1043-128460 + Details
Name: | us-gaap_BusinessCombinationAcquisitionRelatedCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The difference between the carrying value and the sale price of equity securities, not separately or otherwise categorized as trading or available-for-sale. This element includes investments in which the entity holds a small ownership stake (generally, less than 20% of the shares outstanding) and cannot exert significant influence. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(h)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
Name: | us-gaap_GainLossOnSaleOfEquityInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The aggregate amount provided for estimated restructuring charges, remediation costs, and asset impairment loss during an accounting period. Generally, these items are either unusual or infrequent, but not both (in which case they would be extraordinary items). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
Name: | us-gaap_RestructuringSettlementAndImpairmentProvisions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=ter_ZtecCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=ter_UniversalRobotsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=ter_AvionicsInterfaceTechnologiesLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ter_WirelessTestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ter_SystemsTestGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ter_IndustrialAutomationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ter_SemiconductorTestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ter_CorporateAndEliminationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_OtherNonoperatingIncomeExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_SellingGeneralAndAdministrativeExpensesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_OtherOperatingIncomeExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |