8. Borrowings

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Revolving Credit Facility

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In December 2021, we entered into an amendment to the senior secured credit facility that increased the aggregate amount available to borrow from $535 million to $750 million. The amended facility matures in December 2026 and is comprised of a $600 million revolving credit facility and a $150 million delayed draw term loan. The revolving credit facility includes a $300 million sub-limit for letters of credit. Under certain circumstances and subject to certain conditions, we have the ability to increase the revolving credit facility by the greater of $250 million or such amount as would not cause our secured leverage ratio to exceed a specified level. Borrowings under the amended facility bore interest at SOFR plus a margin of 1.25% as of December 31, 2022 (which margin can range from 1.0% to 1.75% based on our consolidated net leverage ratio as defined in the credit facility). Letters of credit reduce the amount available to borrow under the credit facility by their face value amount. The unused portion of the facility bore a commitment fee of 0.15% as of December 31, 2022 (which fee can range from 0.10% to 0.25% based on our consolidated net leverage ratio as defined in the credit facility). Our borrowings under the credit agreement are guaranteed by certain of our U.S.-based subsidiaries and are secured by substantially all of our assets and substantially all the assets of certain of our subsidiaries. The credit facility contains various representations and warranties, affirmative, negative and financial covenants and events of default. As of December 31, 2022, there were $235 million of borrowings outstanding under the revolving credit facility, $66.8 million outstanding under the letters of credit sub-facility, and $146.9 million outstanding under the term loan. As of December 31, 2022, the amount available to borrow under the revolving credit facility was $298.2 million. Loan amounts under the revolving credit facility may be borrowed, repaid and re-borrowed during the term. The principal amount of each loan is due and payable in full on the maturity date. We have the right to repay each loan in whole or in part from time to time without penalty. It is our practice to routinely borrow and repay several times per year under the revolving facility and therefore, borrowings under the revolving credit facility are included in current liabilities. As of December 31, 2022, we were in compliance with all financial covenants under this credit facility. In September 2022, we entered into an interest rate swap in order to mitigate the interest rate risk on a portion of the interest payments expected to be made on the borrowings outstanding under the revolving credit facility and term loan. Refer to Note 1 for details.

1.25% Convertible Senior Notes (“Notes”) Due 2022

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In February 2017, we issued $287.5 million of the Notes in a private offering. The Notes were governed by an indenture dated February 22, 2017. The maturity date for the payment of principal was September 1, 2022. The Notes bore interest at the rate of 1.25% and were payable in cash semiannually in arrears on each March 1 and September 1. On September 1, 2022, we repurchased and cancelled the then-remaining $242.3 million balance of the Notes utilizing proceeds from the senior secured credit facility.

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Issuance costs of $7.7 million were allocated between debt ($6.5 million) and equity ($1.2 million) components with the portion allocated to the debt presented as an offset against long-term debt in the consolidated balance sheet and was being amortized as interest expense over the life of the Notes using the effective interest method. Total interest expense recognized for the three and six months ended December 31, 2021 related to the Notes was $1.2 and $2.5 million, respectively, which consisted of $0.9 million and $1.8 million of contractual interest expense and $0.3 million and $0.7 million of amortization of debt issuance costs. Total interest expense recognized for the three and six months ended December 31, 2022 related to the Notes was nil and $0.7 million, respectively, which consisted of $0.5 million of contractual interest expense and $0.2 million of amortization of debt issuance costs.

Other Borrowings

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Several of our foreign subsidiaries maintain bank lines of credit, denominated in local currencies and U.S. dollars, primarily for the issuance of letters of credit. As of December 31, 2022, $48.5 million was outstanding under these letter-of-credit facilities. As of December 31, 2022, the total amount available under these credit facilities was $20.5 million.

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Long-term debt consisted of the following (in thousands):

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