XML 121 R110.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Schedule of Restricted Stock Units Weighted Average Remaining Contractual Terms (Detail) (Restricted Stock Units) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Outstanding | 1 year 1 month 10 days | 1 year 1 month 21 days | 1 year 4 days
Expected to vest | 1 year 1 month 6 days | 1 year 1 month 17 days | 1 year

X
- Definition Share based Compensation Arrangement by Share based Payment Award, Equity Instruments Other than Option, Vested and Expected to Vest Weighted Average Remaining Contractual Term + References No definition available. + Details
Name: | ter_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionVestedAndExpectedToVestWeightedAverageRemainingContractualTerm
Namespace Prefix: | ter_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average remaining contractual term for equity-based awards excluding options, 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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