Debt
Revolving Credit Facility
In August 2020, we entered into a Credit Agreement with a consortium of financial institutions and lenders that provides for a five-year, senior secured revolving credit facility of $300.0 million (Credit Facility). Proceeds from the Credit Facility may be used for general corporate purposes and working capital. The Credit Facility expires, absent default or termination by us, on August 24, 2025.
In March 2023, we amended the Credit Facility to transition LIBOR to the Secured Overnight Financing Rate (SOFR) effective April 1, 2023. The annual interest rates applicable to loans under the Credit Facility are, at our option, equal to either a base rate plus a margin ranging from 0.50% to 1.25% or term SOFR (based on one, three or six-month interest periods), subject to a floor of 0%, plus a margin ranging from 1.50% to 2.25%. Interest on revolving loans is payable quarterly in arrears with respect to loans based on the base rate and at the end of an interest period in the case of loans based on term SOFR (or at each three-month interval if the interest period is longer than three months). We are also required to pay a commitment fee on the unused portion of the commitments ranging from 0.25% to 0.40% per annum, payable quarterly in arrears.
In September 2020, we borrowed $250.0 million under the Credit Facility which was repaid in February 2022. In April 2023, we borrowed $100.0 million which remained outstanding at the end of fiscal 2024. The outstanding borrowings bore weighted-average interest at an annual rate of approximately 1.60%, 1.61%, and 6.73% based on a one-month term LIBOR (or SOFR) period resulting in interest expense of $4.1 million, $0.3 million and $5.5 million during fiscal 2022, 2023 and 2024.
Borrowings under the Credit Facility are collateralized by substantially all of our assets and subject to certain restrictions and two financial ratios measured as of the last day of each fiscal quarter: a Consolidated Leverage Ratio not to exceed 4.5:1 and an Interest Coverage Ratio not to be less than 3:1. We were in compliance with all covenants under the Credit Facility at the end of fiscal 2024.
Convertible Senior Notes
In April 2018, we issued $575.0 million of 0.125% convertible senior, unsecured notes (the Notes), in a private placement to qualified institutional buyers. In April 2023, we repaid the entire principal balance with approximately $575.0 million in cash and 1,065 shares of our common stock. Prior to repayment, the Notes carried an effective interest rate of 0.6% and we recognized interest expense of $3.3 million and $0.6 million during fiscal 2023 and the first quarter of 2024. The total estimated fair value of the Notes at the end of fiscal 2023 was $660.0 million based on the closing trading price per $100 of the Notes as of the last day of trading of fiscal 2023.