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