XML 48 R30.htm IDEA: XBRL DOCUMENT
v3.2.0.727

Debt (Tables) | 6 Months Ended
--- | ---
Jul. 05, 2015
Interest Expense on Convertible Senior Notes | The interest expense on Teradyne’s convertible senior notes for the three and six months ended July 5, 2015 and June 29, 2014 was as follows:
|  | For the Three Months Ended |  |  | For the Six Months Ended |
|  | July 5, 2015 |  |  | June 29, 2014 |  |  | July 5, 2015 |  |  | June 29, 2014 |
|  | (in thousands) |
Contractual interest expense on the coupon |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 1,757 |
Amortization of the discount component and debt issuance fees recognized as interest expense |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 4,493 |
Total interest expense on the convertible debt |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 6,250 |

X
- Definition Schedule of Interest Expense Related to Convertible Debt. + References No definition available. + Details
Name: | ter_ScheduleOfInterestExpenseRelatedToConvertibleDebtTableTextBlock
Namespace Prefix: | ter_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration