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Long-Term Debt, Net | 12 Months Ended
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Dec. 31, 2023
Debt Disclosure [Abstract] |
Long-Term Debt, Net | Long-Term Debt, Net 1.00% Convertible Notes due 2028 In August 2022, we completed the sale of $720.0 million in aggregate principal amount of 1.00% Convertible Senior Notes due 2028 (the “2028 Convertible Notes” and collectively with the 2024 Convertible Notes and 2027 Convertible Notes the “Convertible Notes”). The net proceeds in connection with the issuance of the 2028 Convertible Notes, after deducting the initial purchasers’ fee of $18.0 million, was approximately $702.0 million. We also incurred additional debt issuance costs totaling $1.0 million. Debt issuance costs and the initial purchasers’ fee are presented as a debt discount. The 2028 Convertible Notes pay interest semi-annually in arrears on February 15th and August 15th of each year at an annual rate of 1.00%. The 2028 Convertible Notes are general unsecured obligations and rank senior in right of payment to all indebtedness that is expressly subordinated in right of payment to the 2028 Convertible Notes, rank equally in right of payment with all existing and future liabilities that are not so subordinated, are effectively junior to any secured indebtedness to the extent of the value of the assets securing such indebtedness and are structurally subordinated to all indebtedness and other liabilities (including trade payables) of our current or future subsidiaries. The 2028 Convertible Notes have a maturity date of August 15, 2028. Holders may convert their 2028 Convertible Notes at their option only in the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on December 31, 2022, if the last reported sale price per share of common stock exceeds 130% of the conversion price for each of at least 20 trading days during the 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter; (2) during the five consecutive business days immediately after any five consecutive trading day period (such five consecutive trading day period, the “measurement period”) in which the trading price per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price per share of our common stock on such trading day and the conversion rate on such trading day; (3) upon the occurrence of certain corporate events or distributions on our common stock, as described in the offering memorandum for the 2028 Convertible Notes; (4) if we call such notes for redemption; and (5) at any time from, and including, February 15, 2028 until the close of business on the second scheduled trading day immediately before the maturity date. As of December 31, 2023, the 2028 Convertible Notes were not convertible. Upon conversion, we will pay cash for the settlement of principal, and for the premium, if applicable, we will pay cash, deliver shares of common stock or a combination of cash and shares of common stock, at our election. The initial conversion rate for the 2028 Convertible Notes is 17.8517 shares of common stock per $1,000 in principal amount of 2028 Convertible Notes, equivalent to a conversion price of approximately $56.02 per share of our common stock. The conversion rate is subject to adjustment in some events but will not be adjusted for any accrued or unpaid interest. As of December 31, 2023, we were in compliance with all covenants and there was no material adverse change in our business, operations or financial condition. Capped Call Transactions In connection with the offering of the 2028 Convertible Notes, we entered into capped call transactions with certain counterparties (the “Capped Call Transactions”). The Capped Call Transactions are expected generally to reduce potential dilution to holders of our common stock upon conversion of the 2028 Convertible Notes or at our election (subject to certain conditions) offset any cash payments we are required to make in excess of the principal amount of such converted 2028 Convertible Notes. The cap price of the Capped Call Transactions is initially $75.4075 per share of common stock, representing a premium of 75% above the last reported sale price of $43.09 per share of common stock on August 15, 2022, and is subject to certain adjustments under the terms of the Capped Call Transactions. As of December 31, 2023, no capped calls had been exercised. Pursuant to their terms, the capped calls qualify for classification within stockholders’ equity in our consolidated balance sheets, and their fair value is not remeasured and adjusted as long as they continue to qualify for stockholders’ equity classification. We paid approximately $69.1 million for the Capped Calls, including applicable transaction costs, which was recorded as a reduction to additional paid-in capital in the consolidated balance sheets. The Capped Call Transactions are separate transactions entered into by us with the capped call Counterparties, are not part of the terms of the Convertible Notes, and do not affect any holder’s rights under the Convertible Notes. Holders of the Convertible Notes do not have any rights with respect to the Capped Call Transactions. 0.25% Convertible Notes due 2027 In March 2021, we completed the sale of $805.0 million in aggregate principal amount of 0.25% Convertible Senior Notes due 2027 (the “2027 Convertible Notes”). The net proceeds in connection with the issuance of the 2027 Convertible Notes, after deducting the initial purchasers’ fee of $20.1 million, was approximately $784.9 million. We also incurred additional debt issuance costs totaling $0.4 million. Debt issuance costs and the initial purchasers’ fee are presented as a debt discount. The 2027 Convertible Notes pay interest semi-annually in arrears on March 1st and September 1st of each year at an annual rate of 0.25%. The 2027 Convertible Notes are general unsecured obligations and rank senior in right of payment to all indebtedness that is expressly subordinated in right of payment to the 2027 Convertible Notes, rank equally in right of payment with all existing and future liabilities that are not so subordinated, are effectively junior to any secured indebtedness to the extent of the value of the assets securing such indebtedness and are structurally subordinated to all indebtedness and other liabilities (including trade payables) of our current or future subsidiaries. The 2027 Convertible Notes have a maturity date of March 1, 2027. Holders may convert their 2027 Convertible Notes at their option only in the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on June 30, 2021, if the last reported sale price per share of common stock exceeds 130% of the conversion price for each of at least 20 trading days during the 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter; (2) during the five consecutive business days immediately after any five consecutive trading day period (such five consecutive trading day period, the “measurement period”) in which the trading price per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price per share of our common stock on such trading day and the conversion rate on such trading day; (3) upon the occurrence of certain corporate events or distributions on our common stock, as described in the offering memorandum for the 2027 Convertible Notes; (4) if we call such notes for redemption; and (5) at any time from, and including, September 1, 2026 until the close of business on the scheduled trading day immediately before the maturity date. As of December 31, 2023, the 2027 Convertible Notes were not convertible. Upon conversion, we will pay cash for the settlement of principal and for the premium, if applicable, we will pay cash, deliver shares of common stock or a combination of cash and shares of common stock, at our election. The initial conversion rate for the 2027 Convertible Notes is 12.9576 shares of common stock per $1,000 in principal amount of 2027 Convertible Notes, equivalent to a conversion price of approximately $77.17 per share of our common stock. The conversion rate is subject to adjustment. As of December 31, 2023, we were in compliance with all covenants and there was no material adverse change in our business, operations or financial condition. 1.25% Convertible Notes due 2024 In November 2019, we completed the sale of $460.0 million in aggregate principal amount of 1.25% Convertible Senior Notes due 2024 (the “2024 Convertible Notes”). The net proceeds in connection with the issuance of the 2024 Convertible Notes, after deducting the initial purchasers’ fee of $12.7 million, was approximately $447.3 million. We also incurred debt issuance cost totaling $0.3 million. Debt issuance costs and the initial purchasers’ fee were presented as a debt discount. In January 2021, we notified the note holders of our irrevocable election to settle the principal of the 2024 Convertible Notes in cash and for the premium, to deliver shares of common stock. The conversion rate for the 2024 Convertible Notes was 41.9208 shares of common stock per $1,000 in principal amount of 2024 Convertible Notes, equivalent to a conversion price of approximately $23.85 per share of our common stock. The conversion rate was subject to adjustment. In March 2021, we completed a privately negotiated, induced conversion of $369.1 million principal amount of the 2024 Convertible Notes (“2021 Note Repurchases” or the “2021 Induced Conversion”). In connection with the 2021 Induced Conversion, we paid approximately $370.2 million in cash, which included principal and accrued interest, and issued approximately 9.08 million shares of our common stock representing the intrinsic value based on the contractual conversion rate and incremental shares as an inducement for conversion. As a result of the 2021 Induced Conversion, we recorded $21.0 million in induced conversion expense which was included in other income (expense) of our consolidated statements of income in 2021. The induced conversion expense represented the fair value of the common stock issued upon conversion in excess of the common stock issuable under the original terms of the 2024 Convertible Notes. In August 2022, we completed a privately negotiated induced conversion of $77.4 million principal amount of the 2024 Convertible Notes (“2022 Note Repurchases” or the “2022 Induced Conversion”). In connection with the 2022 Induced Conversion, we paid approximately $77.6 million in cash, which included principal and accrued interest, and issued approximately 1.51 million shares of our common stock representing the intrinsic value based on the contractual conversion rate and incremental shares as an inducement for conversion. As a result of the 2022 Induced Conversion, we recorded $2.7 million in induced conversion expense which was included in other income (expense) of our consolidated statements of income in 2022. The induced conversion expense represented the fair value of the common stock issued upon conversion in excess of the common stock issuable under the original terms of the 2024 Convertible Notes. In January 2023, we issued a notice for the redemption of 2024 Convertible Notes. Holders of the notes could convert their notes at any time prior to the close of the business day prior to the redemption date. In March 2023, holders of the notes elected to convert the 2024 Convertible Notes in full. In connection with the conversion, we paid approximately $13.5 million in cash which included principal and accrued interest, and issued 288,886 shares of our common stock representing the intrinsic value based on the contractual conversion rate. Net Carrying Amounts of our Convertible Notes The carrying amount and fair value of our Convertible Notes were as follows (in thousands).
|  | December 31, 2023 |  | December 31, 2022
Principal amount |  |  |  |
2024 Convertible Notes |  | $ | — |  |  | $ | 13,483 |
2027 Convertible Notes |  | 805,000 |  |  | 805,000 |
2028 Convertible Notes |  | 720,000 |  |  | 720,000 |
Total principal amount |  | $ | 1,525,000 |  |  | $ | 1,538,483 |
Unamortized debt discount |  |  |  |
2024 Convertible Notes |  | $ | — |  |  | $ | (149) |
2027 Convertible Notes |  | (10,950) |  |  | (14,359) |
2028 Convertible Notes |  | (14,802) |  |  | (17,875) |
Total unamortized debt discount |  | $ | (25,752) |  |  | $ | (32,383) |
Carrying amount |  |  |  |
2024 Convertible Notes |  | $ | — |  |  | $ | 13,334 |
2027 Convertible Notes |  | 794,050 |  |  | 790,641 |
2028 Convertible Notes |  | 705,198 |  |  | 702,125 |
Total carrying amount |  | $ | 1,499,248 |  |  | $ | 1,506,100 |
Fair value based on trading levels (Level 2) |  |  |  |
2024 Convertible Notes |  | $ | — |  |  | $ | 32,176 |
2027 Convertible Notes |  | 695,826 |  |  | 784,770 |
2028 Convertible Notes |  | 670,522 |  |  | 849,823 |
Total fair value of outstanding notes |  | $ | 1,366,348 |  |  | $ | 1,666,769 |
Remaining amortization per period of debt discount (in years) |  |  |  |
2024 Convertible Notes |  | — |  |  | 1.9
2027 Convertible Notes |  | 3.2 |  | 4.2
2028 Convertible Notes |  | 4.6 |  | 5.6
The following table summarizes the components of interest expense and the effective interest rates for each of our Convertible Notes (in thousands).
|  | Twelve Months Ended December 31,
|  | 2023 |  | 2022 |  | 2021
Coupon interest |  |  |  |  |  |
2024 Convertible Notes |  | $ | 36 |  |  | $ | 771 |  |  | $ | 1,906 |
2027 Convertible Notes |  | 2,013 |  |  | 2,013 |  |  | 1,677 |
2028 Convertible Notes |  | 7,200 |  |  | 2,660 |  |  | — |
Total coupon interest |  | $ | 9,249 |  |  | $ | 5,444 |  |  | $ | 3,583 |
Amortization of debt discount |  |  |  |  |  |
2024 Convertible Notes |  | $ | 24 |  |  | $ | 357 |  |  | $ | 838 |
2027 Convertible Notes |  | 3,409 |  |  | 3,386 |  |  | 2,804 |
2028 Convertible Notes |  | 3,073 |  |  | 1,124 |  |  | — |
Total amortization of debt discount |  | $ | 6,506 |  |  | $ | 4,867 |  |  | $ | 3,642 |
Interest expense |  |  |  |  |  |
2024 Convertible Notes |  | $ | 60 |  |  | $ | 1,128 |  |  | $ | 2,744 |
2027 Convertible Notes |  | 5,422 |  |  | 5,399 |  |  | 4,481 |
2028 Convertible Notes |  | 10,273 |  |  | 3,784 |  |  | — |
Total interest expense |  | $ | 15,755 |  |  | $ | 10,311 |  |  | $ | 7,225 |
Effective interest rates |  |  |  |  |  |
2024 Convertible Notes |  | — |  |  | 1.8 | % |  | 1.8 | %
2027 Convertible Notes |  | 0.7 | % |  | 0.7 | % |  | 0.7 | %
2028 Convertible Notes |  | 1.5 | % |  | 1.5 | % |  | n/a
Revolving Credit and Term Loan Facilities (May 2022) In May 2022, in connection with the closing of the Antares acquisition, we entered into a credit agreement, which was subsequently amended, with Bank of America, N.A., as Administrative Agent, Swing Line Lender and an L/C Issuer, and the other lenders and L/C Issuers party thereto (the “2022 Credit Agreement), evidencing a credit facility (the “2022 Facility”) that provides for (i) a $350 million revolving credit facility (the “Revolving Credit Facility”) and (ii) a $250 million term loan facility (the “Term Facility”). Proceeds from a $120 million draw on the Revolving Credit Facility and the $250 million Term Facility were used to fund a portion of the Antares acquisition, repay Antares’ existing debt and pay fees and expenses in connection with the Antares acquisition. The 2022 Credit Agreement contains an expansion feature, which allows us, subject to certain conditions, to increase the aggregate principal amount of the 2022 Facility, provided we remain in compliance with underlying financial covenants on a pro forma basis including the consolidated interest coverage ratio and the consolidated net leverage ratio covenants set forth in the 2022 Credit Agreement. The 2022 Facility will mature on November 30, 2026 unless either the Revolving Credit Facility or the Term Facility is extended prior to such date in accordance with the 2022 Credit Agreement. The Term Facility requires quarterly scheduled repayments of the term loans in each of the first, second, third and fourth years following the closing in annual amounts equal to 2.50%, 5.00%, 7.50% and 10.00% of the initial principal amount of the term loans, respectively. The term loans are also subject to mandatory prepayments from the proceeds of certain asset sales, subject to our right to reinvest the proceeds thereof. Borrowings under the 2022 Facility bear interest, at our option, at a rate equal to an applicable margin plus: (a) the applicable Term Secured Overnight Financing Rate (“SOFR”) (which includes a SOFR adjustment of 0.10%), or (b) a base rate determined by reference to the highest of (1) the federal funds effective rate plus 0.50%, (2) the Bank of America prime rate, (3) the Term SOFR rate for an interest period of one month plus 1.10%, and (4) 1.00%. The margin for the 2022 Facility ranges, based on our consolidated total net leverage ratio, from 0.25% to 1.25% in the case of base rate loans and from 1.25% to 2.25% in the case of Term SOFR rate loans. In addition to paying interest on the outstanding principal under the Facility, we will pay (i) a commitment fee in respect of the unutilized commitments thereunder and (ii) customary letter of credit fees and agency fees. The commitment fees range from 0.15% to 0.35% per annum based on our consolidated net leverage ratio. In August 2022, we entered into Amendment No. 1 to the Credit Agreement (the “Amendment”) among the Company, the Guarantors (as defined in the Credit Agreement), each L/C Issuer from time to time party thereto, Bank of America, N.A., as Administrative Agent (in such capacity, the “Administrative Agent”) and swing line lender (in such capacity, the “Swing Line Lender”), and each lender party thereto, which amends the Credit Agreement dated as of May 24, 2022 (the “Credit Agreement”) among the Company, the Guarantors, the Administrative Agent, the Swing Line Lender, each Lender and the L/C Issuers. The Amendment, among other things, increased the size of the revolving credit facility from $350 million to $575 million. The terms of the Revolving Credit Facility were otherwise unchanged. Concurrently with the entry into the Amendment, we repaid the entire outstanding Term Loan Facility and repaid all outstanding loans under the Revolving Credit Facility under the 2022 Credit Agreement. As of December 31, 2023, the Revolving Credit Facility was undrawn. We incurred a total of $3.6 million in third-party costs related to the 2022 Credit Agreement which are recorded as debt issuance cost within prepaid expenses and other assets in our consolidated balance sheets. As of December 31, 2023, the unamortized debt issuance cost related to the revolving credit facility was $2.3 million. Future maturities and interest payments of long-term debt as of December 31, 2023, are as follows (in thousands):
2024 |  | $ | 9,213 |
2025 |  | 9,213 |
2026 |  | 9,213 |
2027 |  | 812,535 |
2028 |  | 724,480 |
Thereafter |  | — |
Total minimum payments |  | 1,564,654 |
Less amount representing coupon interest |  | (39,654) |
Gross balance of long-term debt |  | 1,525,000 |
Less unamortized debt discount |  | (25,752) |
Carrying value of long-term debt |  | 1,499,248 |
Less current portion of long-term debt |  | — |
Long-term debt, less current portion and unamortized debt discount |  | $ | 1,499,248 |

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