The below tables represent the key components of Teradyne’s convertible senior notes:
| December 31, 2013 |
December 31, 2012 |
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Debt principal |
$ | 189,998 | $ | 190,000 | ||||
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Unamortized discount |
4,290 | 20,104 | ||||||
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Net carrying amount of the convertible debt |
$ | 185,708 | $ | 169,896 | ||||
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| For the year ended | ||||||||
| December 31, 2013 |
December 31, 2012 |
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Contractual interest expense on the coupon |
$ | 8,550 | $ | 8,550 | ||||
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Amortization of the discount component and debt issue fees recognized as interest expense |
16,628 | 14,612 | ||||||
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Total interest expense on the convertible debt |
$ | 25,178 | $ | 23,162 | ||||
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