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Convertible Senior Notes (Tables) | 3 Months Ended
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Apr. 30, 2019
Debt Disclosure [Abstract] |
Schedule of convertible debt | The net carrying value of the liability component of the Notes was as follows:
(in thousands) | April 30, 2019
Principal | $ | 575,000 |
Less: unamortized debt discount | (119,903 | )
Less: unamortized transaction costs | (9,712 | )
Net carrying amount | $ | 445,385 |
The net carrying amount of the equity component of the Notes was as follows:
(in thousands) | April 30, 2019
Proceeds allocated to the conversion option (debt discount) | $ | 134,667 |
Less: transaction costs | (3,336 | )
Net carrying amount | $ | 131,331 |
The interest expense recognized related to the Notes was as follows:
(in thousands) | Three Months Ended April 30, 2019
Contractual interest expense | $ | 710 |
Amortization of debt discount | 484 |
Amortization of transaction costs | 5,970 |
Total | $ | 7,164 |

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- 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
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- References No definition available. + Details
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