XML 71 R60.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Stock Based Compensation - Additional Information (Detail) - $ / shares shares in Millions | 1 Months Ended | 6 Months Ended
--- | --- | ---
Jan. 31, 2016 | Jan. 31, 2014 | Jul. 03, 2016 | Jul. 05, 2015
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Stock options term |  |  | 7 years |
Service-Based Restricted Stock Units | Employees |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Restricted stock unit awards granted |  |  | 1.2 | 1.4
Weighted average grant date fair value of restricted stock units granted |  |  | $ 18.49 | $ 17.15
Service-Based Restricted Stock Units | Director |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Restricted stock unit awards granted |  |  | 0.1 | 0.1
Weighted average grant date fair value of restricted stock units granted |  |  | $ 18.71 | $ 20.21
Service-Based Restricted Stock Units | Executive Officer |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Number of service-based stock options granted to executive officers |  |  | 0.1 | 0.1
Weighted average grant date fair value of stock options granted to executive officers |  |  | $ 5.30 | $ 4.43
Restricted Stock Units | Employees |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Period of stock granted to employees and executive officers vest in equal installments |  |  | 4 years |
Restricted Stock Units | Director |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Period of stock granted to employees and executive officers vest in equal installments |  |  | 1 year |
Percentage of awards vesting on the first anniversary of grant date |  |  | 100.00% |
Stock Options |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Period of stock granted to employees and executive officers vest in equal installments |  |  | 4 years |
TSR Performance-Based Restricted Stock Units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Total shareholder return performance measurement period | 3 years |  |  |
Minimum age of retirement to be eligible for PRSUs |  | 60 years |  |
Minimum years of service for retirement to be eligible for PRSUs |  | 10 years |  |
Restricted stock unit awards granted |  |  | 0.1 | 0.2
Weighted average grant date fair value of restricted stock units granted |  |  | $ 20.29 | $ 18.21
Estimated annual dividend amount per share |  |  | 0.24 |
Stock price |  |  | $ 19.43 | $ 18.10
TSR Performance-Based Restricted Stock Units | Share-based Compensation Award, Tranche One |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Percentage of vesting of target shares upon performance achieved | 200.00% |  |  |
TSR Performance-Based Restricted Stock Units | Share-based Compensation Award, Tranche Two |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Percentage of vesting of target shares upon performance achieved | 0.00% |  |  |
PBIT PRSUs |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Total shareholder return performance measurement period | 3 years |  |  |
Restricted stock unit awards granted |  |  | 0.1 |
Weighted average grant date fair value of restricted stock units granted |  |  | $ 18.71 |
PBIT PRSUs | Share-based Compensation Award, Tranche One |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Percentage of vesting of target shares upon performance achieved | 200.00% |  |  |
PBIT PRSUs | Share-based Compensation Award, Tranche Two |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Percentage of vesting of target shares upon performance achieved | 0.00% |  |  |

X
- Definition Minimum Retirement Age For Eligible Employees Of Postretirement Plans + References No definition available. + Details
Name: | ter_MinimumRetirementAgeForEligibleEmployeesOfPostretirementPlans
Namespace Prefix: | ter_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum Years Of Service For Eligible Employees Of Postretirement Plans + References No definition available. + Details
Name: | ter_MinimumYearsOfServiceForEligibleEmployeesOfPostretirementPlans
Namespace Prefix: | ter_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage Upon One Year Anniversary Of Date Of Grant + References No definition available. + Details
Name: | ter_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentageUponOneYearAnniversaryOfDateOfGrant
Namespace Prefix: | ter_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Shareholder Return Award Performance Measurement Period + References No definition available. + Details
Name: | ter_ShareholderReturnAwardPerformanceMeasurementPeriod
Namespace Prefix: | ter_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of dividends expected to be paid to holders of the underlying shares or contracted instruments over the term of the instruments life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssumptionsExpectedDividendPayments
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
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_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Price of a single share of a number of saleable stocks of a company. + References No definition available. + Details
Name: | us-gaap_SharePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of vesting of share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=ter_ServiceBasedRestrictedStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=ter_EmployeesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=us-gaap_DirectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=us-gaap_ExecutiveOfficerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=ter_TotalShareholderReturnPerformanceBasedRestrictedStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VestingAxis=us-gaap_ShareBasedCompensationAwardTrancheOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VestingAxis=us-gaap_ShareBasedCompensationAwardTrancheTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=ter_ProfitBeforeIncomeAndTaxPerformanceBasedRestrictedStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |