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Convertible Senior Notes | 12 Months Ended
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Dec. 31, 2023
Debt Disclosure [Abstract] |
Convertible Senior Notes | Debt and Credit Agreement On November 15, 2019, the Company entered into an Amended and Restated Credit Agreement (as amended, the “Prior A&R Credit Agreement”) with the lenders from time to time party thereto, Wells Fargo Securities, LLC, Citizens Bank, N.A., and JPMorgan Chase Bank, N.A., as joint lead arrangers, and Wells Fargo Bank, National Association, as administrative agent. The Prior A&R Credit Agreement provided for (a) a five-year revolving credit facility of $500.0 million (the “Prior Revolving Credit Facility”) and (b) an uncommitted incremental loan facility of up to $250.0 million (the “Prior Incremental Facility”). In addition, the Prior A&R Credit Agreement included a letter of credit sub-limit of up to $15.0 million and a swing line loan sub-limit of up to $25.0 million. The Prior A&R Credit Agreement had an expiration date of November 15, 2024, upon which date all remaining outstanding borrowings would be due and payable. On September 22, 2020 and March 29, 2023, the Company entered into amendments to the Prior A&R Credit Agreement to, among other changes, permit the issuance of the convertible senior notes and the purchase of the convertible note hedge transactions, as described in Note 11, Convertible Senior Notes, expand the Company’s flexibility to repurchase its common stock and make other restricted payments, and replace the total net leverage covenant with a new secured net leverage covenant that requires the Company to maintain a consolidated secured net leverage ratio not to exceed 3.50:1 for the calendar quarters ending September 30, 2020, December 31, 2020, and March 31, 2021 and 3.00:1 for the calendar quarters ending thereafter, as well as to remove and replace the interest rate benchmark based on the London interbank offered rate (“LIBOR”) and related LIBOR-based mechanics applicable to borrowings under the A&R Credit Agreement with an interest rate benchmark based on the secured overnight financing rate (“SOFR”) as administered by the Federal Reserve Bank of New York and related SOFR-based mechanics. Subsequent to the March 29, 2023 amendment, loans under the Prior Revolving Credit Facility bore interest, at the Company’s option, at a rate equal to either (a) the Adjusted Term SOFR (as defined in the Prior A&R Credit Agreement), plus an applicable margin ranging from 1.25% to 2.00% per annum based on the Company’s Consolidated Total Net Leverage Ratio (as defined in the Prior A&R Credit Agreement), or (b) an alternate base rate equal to the highest of (i) the prime rate, (ii) the federal funds rate plus 0.50%, and (iii) the Adjusted Term SOFR for a one month tenor plus 1.00%, plus an applicable margin ranging from 0.25% to 1.00% per annum based on the Company’s Consolidated Total Net Leverage Ratio. Undrawn commitments under the Prior Revolving Credit Facility were subject to a commitment fee ranging from 0.15% to 0.30% per annum based on the Company’s Consolidated Total Net Leverage Ratio on the average daily unused portion of the Prior Revolving Credit Facility. The applicable margin for, and certain other terms of, any term loans under the Prior Incremental Facility would be determined prior to the incurrence of such loans. The Company was permitted to make voluntary prepayments at any time without payment of a premium or penalty. The Prior A&R Credit Agreement contained customary representations and warranties and customary affirmative and negative covenants applicable to the Company and its subsidiaries, including, among other things, restrictions on indebtedness, liens, investments, mergers, dispositions, dividends, and other distributions. The Prior A&R Credit Agreement also contained financial covenants that required the Company and its subsidiaries to not exceed a maximum total secured net leverage ratio (as described above) and maintain a minimum interest coverage ratio. In addition, the Prior A&R Credit Agreement contained certain customary events of default including, but not limited to, failure to pay interest, principal, and fees, or other amounts when due, material misrepresentations or misstatements in any representation or warranty, covenant defaults, certain cross defaults to other material indebtedness, certain judgment defaults, and events of bankruptcy. The Company entered into a Second Amended and Restated Credit Agreement (the “Second A&R Credit Agreement”) on October 10, 2023, with the lenders from time to time party thereto, Wells Fargo Securities, LLC, JPMorgan Chase Bank, N.A., PNC Capital Markets LLC and TD Securities (USA) LLC as joint lead arrangers and Wells Fargo Bank, National Association, as administrative agent. The Second A&R Credit Agreement supersedes the Prior A&R Credit Agreement and provides for (a) a five-year revolving credit facility of $350.0 million (the “Current Revolving Credit Facility”) and (b) an uncommitted incremental loan facility of up to an amount equal to the sum of (i) the greater of $250.0 million or 100% of the adjusted consolidated EBITDA for the last four quarters and (ii) additional amounts subject to pro forma compliance with certain consolidated secured net leverage ratio (the “Current Incremental Facility”). In addition, the Second A&R Credit Agreement includes a letter of credit sub-limit of up to $15.0 million and a swing line loan sub-limit of up to $25.0 million. The Second A&R Credit Agreement has an expiration date of October 10, 2028, subject to acceleration under certain conditions, upon which date all remaining outstanding borrowings will be due and payable. Loans under the Current Revolving Credit Facility bear interest, at the Company’s option, at a rate equal to either (a) the Adjusted Term SOFR (as defined in the Second A&R Credit Agreement), plus an applicable margin ranging from 1.50% to 2.25% per annum based on the Company’s Consolidated Total Net Leverage Ratio (as defined in the Second A&R Credit Agreement), or (b) an alternate base rate equal to the highest of (i) the prime rate, (ii) the federal funds rate plus 0.50%, and (iii) the Adjusted Term SOFR for an interest period of one month plus 1.00%, plus an applicable margin ranging from 0.50% to 1.25% per annum based on the Company’s Consolidated Total Net Leverage Ratio. Undrawn commitments under the Current Revolving Credit Facility are subject to a commitment fee ranging from 0.20% to 0.35% per annum based on the Company’s Consolidated Total Net Leverage Ratio on the average daily unused portion of the Current Revolving Credit Facility. Subject to the terms and conditions of the Current Revolving Credit Facility or Current Incremental Facility the Company is permitted to make voluntary prepayments at any time without payment of a premium or penalty. The availability of funds under the Current Revolving Credit Facility may be subject to reduction in order to maintain compliance with the financial covenants under the Second A&R Credit Agreement. The Second A&R Credit Agreement contains customary representations and warranties and customary affirmative and negative covenants applicable to the Company and its subsidiaries, including, among other things, restrictions on indebtedness, liens, investments, mergers, dispositions, dividends, and other distributions. The Second A&R Credit Agreement contains financial covenants that require the Company and its subsidiaries to not exceed a maximum consolidated secured net leverage ratio (not to exceed 3.00:1) and maintain a minimum consolidated interest coverage ratio (not to be less than 3.00:1). In addition, the Second A&R Credit Agreement contains certain customary events of default including, but not limited to, failure to pay interest, principal, and fees, or other amounts when due, material misrepresentations or misstatements in any representation or warranty, covenant defaults, certain cross defaults to other material indebtedness, certain judgment defaults, and events of bankruptcy. The Company’s obligations under the Second A&R Credit Agreement and, at the election of the Company and the contracting counterparty, any secured swap obligations and banking services obligations owing to a lender (or an affiliate of a lender) are guaranteed by certain of its domestic subsidiaries and secured by substantially all of its and such subsidiary guarantors’ assets. In connection with entering into the Second A&R Credit Agreement, and as a condition precedent to borrowing loans thereunder, the Company and certain of the Company’s other direct and indirect subsidiaries have entered into certain ancillary agreements, including, but not limited to, a reaffirmation agreement, which amends certain terms of the existing collateral agreement and reaffirms their obligations under the existing guaranty agreement. The refinancing of the Prior Credit Agreement was evaluated in accordance with ASC 470-50, Debt - Modifications and Extinguishments. In determining whether the refinancing was to be accounted for as a debt extinguishment or a debt modification, the Company considered whether lenders within the syndicate remained the same or changed and whether the changes in debt terms were substantial. This assessment was performed on an individual lender basis within the syndicate. As a result, the refinancing was accounted for as a modification with the exception of certain lenders that exited the syndicate. The exit of certain lenders resulted in an immaterial write-off of existing unamortized debt issuance costs. The remaining unamortized debt issuance costs related to debt modification, along with the new deferred costs, will be amortized over the remaining term of the Second A&R Credit Agreement. In connection with the Second A&R Credit Agreement, the Company incurred and capitalized an additional $3.0 million of debt issuance costs. The debt issuance costs are being amortized to interest expense using the straight-line method through 2028. As of December 31, 2023, the Company had $350.0 million of funds available under the Current Revolving Credit Facility and as of December 31, 2022, the Company had $500.0 million of funds available under the Prior Revolving Credit Facility. As of December 31, 2023 and 2022, the Company had no outstanding balance under the Prior or Current Revolving Credit Facility. The Company was in compliance with all covenants as of December 31, 2023. Convertible Senior Notes 0.25% Convertible Senior Notes due 2025 On September 25, 2020, the Company completed a private offering of $575.0 million aggregate principal amount of 0.25% convertible senior notes (the “Notes”), including the exercise in full of the initial purchasers’ option to purchase up to an additional $75.0 million principal amount of the Notes. The Company received proceeds from the issuance of the Notes of $559.7 million, net of $15.3 million of transaction fees and other debt issuance costs. The Notes bear interest at a rate of 0.25% per year, payable semiannually in arrears on March 15 and September 15 of each year, beginning on March 15, 2021. The Notes were issued pursuant to an indenture, dated September 25, 2020 (the “Indenture”), between the Company and U.S. Bank National Association, as trustee. The Notes are general senior, unsecured obligations of the Company and will mature on September 15, 2025, unless earlier redeemed, repurchased, or converted. The Notes are convertible at the option of the holders at any time prior to the close of business on the business day immediately preceding May 15, 2025, only under the following circumstances: (i) during any fiscal quarter commencing after the fiscal quarter ended on December 31, 2020 (and only during such fiscal quarter), if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding fiscal quarter is greater than or equal to 130% of the conversion price for the Notes on each applicable trading day; (ii) during the five business day period after any ten consecutive trading day period (the “measurement period”) in which the trading price (as defined in the Indenture) per $1,000 principal amount of the Notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate for the Notes on each such trading day; (iii) if the Company calls such Notes for redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date, but only with respect to the Notes called (or deemed called) for redemption; and (iv) upon the occurrence of specified corporate events, as specified in the Indenture. On or after May 15, 2025 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders of the Notes may convert all or any portion of their Notes at any time, regardless of the foregoing conditions. During the three months ended December 31, 2023 and 2022, none of the conditional conversion features of the Notes were triggered, and therefore, the Notes are not convertible during the first quarter of 2024, commencing on January 1, 2024, and were not convertible during the first quarter of 2023, commencing on January 1, 2023. Accordingly, the Company classified the Notes as a long-term liability in its Consolidated Financial Statements as of December 31, 2023 and 2022. Whether the Notes will be convertible following the first fiscal quarter of 2024 will depend on the satisfaction of the conversion conditions in the future. Under the original terms of the Indenture, upon conversion, the Company could satisfy its conversion obligation by paying or delivering cash, shares of its common stock, or a combination thereof, at the Company’s election, in the manner and subject to the terms and conditions provided in the Indenture. On December 13, 2021, the Company irrevocably elected to fix its settlement method to a combination of cash and shares of the Company’s common stock with the specified cash amount per $1,000 principal amount of Notes of at least $1,000. As a result, for Notes converted on or after December 13, 2021, a converting noteholder will receive (i) up to $1,000 in cash per $1,000 principal amount of Notes and (ii) cash and/or shares of the Company’s common stock, at the Company’s option for any conversion consideration in excess of $1,000. In addition, the Company continues to have the ability to set the specified cash amount per $1,000 principal amount of Notes above $1,000. The initial conversion rate for the Notes is 10.2751 shares of the Company’s common stock per $1,000 principal amount of Notes, which is equivalent to an initial conversion price of approximately $97.32 per share of the Company’s common stock, subject to adjustment under certain circumstances in accordance with the terms of the Indenture. In addition, following certain corporate events that could occur prior to the maturity date of the Notes or if the Company delivers a notice of redemption in respect of the Notes, the Company will, under certain circumstances, increase the conversion rate of the Notes for a holder who elects to convert its Notes (or any portion thereof) in connection with such a corporate event or convert its Notes called (or deemed called) for redemption during the related redemption period (as defined in the Indenture), as the case may be. If the Company undergoes a fundamental change, holders may require, subject to certain exceptions, the Company to repurchase for cash all or any portion of their Notes at a fundamental change repurchase price equal to 100% of the principal amount of the Notes to be repurchased, plus accrued and unpaid interest to, but excluding, the fundamental change repurchase date. As of December 31, 2023, none of the criteria for a fundamental change or a conversion rate adjustment had been met. As of September 20, 2023, the Company may redeem for cash all or any portion of the Notes, at its option, if the last reported sale price of the Company’s common stock has been at least 130% of the conversion price for the Notes then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period (including the last trading day of such period) ending on, and including, the trading day immediately preceding the date on which the Company provides notice of redemption at a redemption price equal to 100% of the principal amount of the Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. If the Company redeems less than all of the outstanding Notes, at least $150.0 million aggregate principal amount of Notes must be outstanding and not subject to redemption as of the date of the relevant notice of redemption. No sinking fund is provided for in the Notes. The debt issuance costs associated with the Notes are being amortized to interest expense over the term of the Notes using an effective interest rate of 0.80%. As of December 31, 2023, the remaining life of the Notes and the related issuance cost accretion is approximately 1.7 years. The maximum number of shares issuable upon conversion, including the effect of a fundamental change and subject to other conversion rate adjustments, would be 5.9 million shares. As of December 31, 2023, the if-converted value of the Notes did not exceed the principal amount. The Notes consisted of the following balances reported in the Consolidated Balance Sheets as of December 31, 2023 and 2022:
| December 31,
| 2023 |  | 2022
Principal amount | $ | 575,000 |  |  | $ | 575,000 |
Unamortized debt issuance costs | (5,338) |  |  | (8,429) |
Convertible senior notes, net | $ | 569,662 |  |  | $ | 566,571 |
The following table summarizes the components of interest expense resulting from the Notes recognized in interest and other income (expense), net in the Consolidated Statements of Operations for the years ended December 31, 2023, 2022 and 2021:
| Year Ended December 31, |  |
| 2023 |  | 2022 (1) |  | 2021 |  |
| (In thousands)
Contractual coupon interest | $ | 1,438 |  |  | $ | 1,438 |  |  | $ | 1,438 |  |  |
Amortization of discount | $ | — |  |  | $ | — |  |  | $ | 18,608 |  |  |
Amortization of debt issuance costs | $ | 3,091 |  |  | $ | 3,066 |  |  | $ | 2,343 |  |  |
_________________________________________________ (1) Refer to Note 1, Organization and Summary of Significant Accounting Policies, for further information regarding the adoption of ASU 2020-06, effective January 1, 2022. Convertible Note Hedge and Warrant Transactions In connection with the issuance of the Notes in September 2020, the Company entered into convertible note hedge and warrant transactions with an affiliate of one of the initial purchasers of the Notes and certain other financial institutions (the “option counterparties”) with respect to the Company’s common stock. The convertible note hedge consists of an option for the Company to purchase up to approximately 5.9 million shares of the Company’s common stock, which is equal to the number of shares of the Company’s common stock underlying the Notes, at an initial strike price of approximately $97.32 per share. The convertible note hedge will expire upon the maturity of the Notes, if not earlier exercised or terminated. The cost of the convertible note hedge was approximately $100.6 million and was accounted for as an equity instrument, which was recorded in additional paid-in capital in the Consolidated Balance Sheets. The Company recorded a deferred tax asset of $25.8 million at issuance related to the convertible note hedge transaction. The convertible note hedge is expected generally to reduce the potential dilution to the Company’s common stock upon any conversion of Notes and/or offset any cash payments the Company is required to make in excess of the principal amount of converted Notes. Separately from the convertible note hedge, the Company entered into warrant transactions to sell to the option counterparties warrants to acquire, subject to customary anti-dilution adjustments, up to approximately 5.9 million shares of its common stock in the aggregate at an initial strike price of $141.56 per share. The warrants require net share or net cash settlement upon the Company’s election. The Company received aggregate proceeds of approximately $51.3 million for the issuance of the warrants, which was recorded in additional paid-in capital at issuance in the Consolidated Balance Sheets. The warrants could separately have a dilutive effect to the Company’s common stock to the extent that the market price per share of its common stock exceeds the strike price of the warrants.

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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 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(c)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 470 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//470/tableOfContent Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1C -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1C Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1C -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1C Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1C -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1C Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1E Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1I -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1I Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1I -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1I Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1I -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1I + Details
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