XML 156 R60.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Net Income Per Common Share (Parenthetical) (Detail) (USD $) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2013 | Jul. 01, 2012 | Jun. 30, 2013 | Jul. 01, 2012 | Mar. 31, 2009
Net Income Loss Per Common Share |  |  |  |  |
Initial debt conversion price | $ 5.48 |  | $ 5.48 |  |
Shares that would be issued upon conversion |  |  | 34,703,196 |  |
Convertible Notes |  |  |  |  |
Net Income Loss Per Common Share |  |  |  |  |
Initial debt conversion price | $ 5.48 | $ 5.48 | $ 5.48 | $ 5.48 |
Shares that would be issued upon conversion | 34,700,000 | 34,700,000 | 34,700,000 | 34,700,000 |
Convertible Notes Hedge Warrant |  |  |  |  |
Net Income Loss Per Common Share |  |  |  |  |
Initial debt conversion price | $ 7.67 | $ 7.67 | $ 7.67 | $ 7.67 | $ 7.67
Shares that would be issued upon conversion | 34,700,000 | 34,700,000 | 34,700,000 | 34,700,000 |

X
- Definition Antidilution adjustments of convertible note hedges. + References No definition available. + Details
Name: | ter_AntidilutionAdjustmentsOfConvertibleNoteHedges
Namespace Prefix: | ter_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ter_NetIncomeLossPerCommonShareLineItems
Namespace Prefix: | ter_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The price per share of the conversion feature embedded in the debt instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870 + Details
Name: | us-gaap_DebtInstrumentConvertibleConversionPrice1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant