XML 15 R39.htm IDEA: XBRL DOCUMENT
v3.19.3

Debt (Tables) | 9 Months Ended
--- | ---
Sep. 29, 2019
Components of Convertible Senior Notes | The below tables represent the key components of Teradyne’s convertible senior notes:
|  | September 29, 2019 |  |  | December 31, 2018 |
|  | (in thousands) |
Debt Principal |  | $ | 460,000 |  |  | $ | 460,000 |
Unamortized discount |  |  | 69,058 |  |  |  | 80,019 |
Net Carrying amount of convertible debt |  | $ | 390,942 |  |  | $ | 379,981 |
|  | For the Three Months Ended |  |  | For the Nine Months Ended |
|  | September 29, 2019 |  |  | September 30, 2018 |  |  | September 29, 2019 |  |  | September 30, 2018 |
|  | (in thousands) |
Contractual interest expense on the coupon |  | $ | 1,438 |  |  | $ | 1,438 |  |  | $ | 4,313 |  |  | $ | 4,313 |
Amortization of the discount component recognized as interest expense |  |  | 3,699 |  |  |  | 3,520 |  |  |  | 10,961 |  |  |  | 10,431 |
Total interest expense on the convertible debt |  | $ | 5,137 |  |  | $ | 4,958 |  |  | $ | 15,274 |  |  | $ | 14,744 |

X
- Definition Tabular disclosure of borrowings which can be exchanged for a specified number of another security at the option of the issuer or the holder. Disclosures include, but are not limited to, principal amount, amortized premium or discount, and amount of liability and equity components. + References No definition available. + Details
Name: | us-gaap_ConvertibleDebtTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration