XML 58 R47.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Schedule of Changes in Fair Value of Level 3 Contingent Consideration (Parenthetical) (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Apr. 02, 2017 | Apr. 03, 2016
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Payments of contingent consideration | $ 1,050 | $ 11,697
Increase(decrease)in contingent consideration | 634 | 1,173
Universal Robots |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Payments of contingent consideration | 1,100 | $ 15,000
EBITDA contingent consideration amount, percentage |  | 100.00%
Increase(decrease)in contingent consideration | $ 600 | $ 1,200

X
- Definition Business Acquisition Contingent Consideration Percentage + References No definition available. + Details
Name: | ter_BusinessAcquisitionContingentConsiderationPercentage
Namespace Prefix: | ter_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Payment Of Contingent Consideration Financing + References No definition available. + Details
Name: | ter_PaymentOfContingentConsiderationFinancing
Namespace Prefix: | ter_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 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_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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