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Debt | 6 Months Ended
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Jul. 31, 2024
Debt Disclosure [Abstract] |
Debt | Debt Convertible Senior Notes In September 2018, we issued $575.0 million in aggregate principal amount of the 0.5% Convertible Senior Notes due in 2023 (“2023 Notes”). The net proceeds from the issuance of the 2023 Notes were $560.8 million after deducting the initial purchasers’ discounts and transaction costs. In January 2021, we issued $690.0 million in aggregate principal amount of the 0% Convertible Senior Notes due in 2024 (“2024 Notes,” and together with the 2023 Notes, the “Notes”). The net proceeds from the issuance of the 2024 Notes were $677.3 million after deducting the initial purchasers’ discounts and transaction costs. The 2023 Notes and 2024 Notes were extinguished, and all outstanding amounts were repaid in full during the third and fourth quarters of fiscal 2024, respectively. We repaid in cash $37.1 million and $689.9 million in aggregate principal amount of the 2023 Notes and 2024 Notes. The effective interest rate on the 2023 Notes was 1.0%. The effective interest rate on the 2024 Notes was 0.6%. Interest expense recognized related to the Notes was as follows:
| Three Months Ended July 31, |  | Six Months Ended July 31,
(in thousands) | 2024 |  | 2023 |  | 2024 |  | 2023
Contractual interest expense | $ | — |  |  | $ | 46 |  |  | $ | — |  |  | $ | 403 |
Amortization of transaction costs | — |  |  | 1,110 |  |  | — |  |  | 2,219 |
Total | $ | — |  |  | $ | 1,156 |  |  | $ | — |  |  | $ | 2,622 |
Capped Calls To minimize the potential economic dilution to our common stock upon conversion of the Notes, we entered into privately negotiated capped call transactions (“Capped Calls”) with certain counterparties. In the first quarter of fiscal 2024, we unwound $23.7 million of the Capped Calls in relation to our 2023 Notes and received cash from the counterparties. All remaining Capped Calls associated with the 2023 Notes and 2024 Notes expired during the third and fourth quarters of fiscal 2024, respectively. Impact on Net Income Per Share In periods when we have net income, the shares of our common stock subject to the Notes outstanding during the period are included in our diluted earnings per share under the if-converted method. In the three months ended April 30, 2023, the Capped Calls were excluded from the calculation of diluted earnings per share, as they were antidilutive. Revolving Credit Facility In January 2021, we entered into a credit agreement, as subsequently amended in May 2023, with a syndicate of banks. The credit agreement extended a senior secured revolving credit facility (the “Credit Facility”) to us in an aggregate principal amount of $500.0 million, which amount may be increased by an additional $250.0 million subject to the terms of the credit agreement. We may use the proceeds of future borrowings under the credit facility to finance working capital, for capital expenditures and for other general corporate purposes, including permitted acquisitions. The Credit Facility matures in January 2026 and requires us to comply with customary affirmative and negative covenants. We were in compliance with all covenants as of July 31, 2024. As of July 31, 2024, there were no outstanding borrowings under the Credit Facility. The Credit Facility is subject to customary fees for loan facilities of this type, including ongoing commitment fees at a rate between 0.25% and 0.30% per annum on the daily undrawn balance.

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481544/470-10-50-6 Reference 2: 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