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INDEBTEDNESS | 9 Months Ended
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Sep. 30, 2021
Debt Disclosure [Abstract] |
INDEBTEDNESS | INDEBTEDNESS Revolving Credit Facility In May 2020, the Company entered into a revolving credit agreement with certain lenders, which provided a $500.0 million senior unsecured revolving credit facility (the "2020 Credit Facility") maturing in May 2023. On May 28, 2020, the Company amended the credit agreement for the 2020 Credit Facility (the "Credit Agreement") to permit the Company’s wholly owned subsidiary, Square Capital, LLC (“Square Capital”), to incur indebtedness in an aggregate principal amount of up to $500.0 million pursuant to the Paycheck Protection Program Liquidity Facility (“PPPLF”) authorized under the Federal Reserve Act of 1913. In connection with its convertible debt offerings in November 2020, the Company entered into a second amendment to the Credit Agreement on November 9, 2020 to permit convertible debt in an aggregate principal amount not to exceed $3.6 billion. On January, 28, 2021, the Company entered into a third amendment to the Credit Agreement to increase the amount of indebtedness that Square Capital is permitted to incur pursuant to the PPPLF from an aggregate principal amount of up to $500 million to an aggregate principal amount of up to $1.0 billion. On May 25, 2021, the Company entered into a fourth amendment to the Credit Agreement to, among other things, extend the maturity date of the loans advanced to May 1, 2024. The Credit Agreement also contains a financial covenant that requires the Company to maintain a quarterly minimum liquidity amount (consisting of the sum of Unrestricted cash and Cash Equivalents plus Marketable Securities, each as defined in the Credit Agreement) of at least $250.0 million, tested on a quarterly basis. The Company is obligated to pay customary fees for a credit facility of this size and type including an unused commitment fee of 0.15%. To date no funds have been drawn and no letters of credit have been issued under the 2020 Credit Facility. As of September 30, 2021, $500.0 million remained available for draw. The Company incurred $0.2 million and $0.6 million in unused commitment fees during the three and nine months ended September 30, 2021, respectively, compared to $0.2 million for the three and nine months ended September 30, 2020, respectively. As of September 30, 2021, the Company was in compliance with all financial covenants associated with the 2020 Credit Facility. Loans under the 2020 Credit Facility bear interest at the Company's option of (i) a base rate based on the highest of the prime rate, the federal funds rate plus 0.50%, and the adjusted LIBOR rate plus 1.00%, in each case, plus a margin ranging from 0.25% to 0.75% or (ii) an adjusted LIBOR rate plus a margin ranging from 1.25% to 1.75%. The Credit Agreement includes provisions allowing the Company to replace or update LIBOR with a replacement rate. The margin is determined based on the Company’s total leverage ratio, as defined in the Credit Agreement. The Credit Agreement also contains customary affirmative and negative covenants typical for a financing of this type that, among other things, restricts the Company and certain of its subsidiaries’ ability to incur additional indebtedness, create liens, merge or consolidate or make certain dispositions, pay dividends and make distributions, enter into restrictive agreements, enter into agreements with affiliates, and make certain investments and acquisitions. Paycheck Protection Program Liquidity Facility On June 2, 2020, Square Capital was approved to borrow under the PPPLF with the Federal Reserve Bank of San Francisco (“First PPPLF Agreement”) at an annual interest rate of 0.35%. The PPPLF extends credit to eligible financial institutions that have originated or purchased PPP loans. Advances under the PPPLF are non-recourse and are secured by a pledge of PPP loans held by Square Capital. The maturity date of any PPPLF loan will be the maturity date of the PPP loans pledged to secure such PPPLF loan. The maturity date of any PPPLF loan will be accelerated on and to the extent of (i) the date of any loan forgiveness reimbursement by the SBA for any PPP loan securing such PPPLF loan; or (ii) the date of purchase by the SBA from Square Capital of any PPP loan securing such PPPLF loan to realize on the SBA’s guarantee of such PPP loan. The maturity date of all PPPLF loans shall be accelerated upon the occurrence of certain events of default by Square Capital, including but not limited to the failure to comply with a requirement of the PPPLF agreement or any representation, warranty, or covenant of Square Capital under the PPPLF agreement being inaccurate on or as of the date it is deemed to be made or on any date on which an PPPLF loan remains outstanding. The Company can also at its option prepay the advances in full or in part without penalty. Square Capital also shall prepay PPPLF loans so that the amount of any PPPLF loans outstanding does not exceed the outstanding amount of PPP loans pledged to secure such PPPLF loans. On January 29, 2021, Square Capital entered into a second PPPLF agreement with the Federal Reserve Bank of San Francisco (“Second PPPLF Agreement”) to secure additional credit collateralized by loans from the subsequent rounds of the PPP program in an aggregate principal amount of up to $1.0 billion under both PPPLF agreements. As of September 30, 2021, $725.7 million of PPPLF advances were outstanding and are, generally, collateralized by the same value of PPP loans. Any differences between the amounts are generally due to the timing of PPP loan repayment or forgiveness, and repayment of PPPLF advances. Senior Unsecured Notes due in 2026 and 2031 On May 20, 2021, the Company issued an aggregate principal amount of $2.0 billion senior unsecured notes comprised of $1.0 billion of senior unsecured notes due 2026 ("2026 Senior Notes") and $1.0 billion senior unsecured notes due 2031 ("2031 Senior Notes" and, together with the 2026 Senior Notes, the “Senior Notes”). The 2026 Senior Notes mature on June 1, 2026, unless earlier redeemed or repurchased, and bear interest a rate of 2.75% payable semi-annually on June 1 and December 1 of each year. The 2031 Senior Notes mature on June 1, 2031, unless earlier redeemed or repurchased, and bear interest at a rate of 3.50% payable semi-annually on June 1 and December 1 of each year. The Senior Notes are subject to optional redemption provisions. At any time prior to May 1, 2026, in the case of the 2026 Senior Notes, and March 1, 2031, in the case of the 2031 Senior Notes, the Company may redeem the applicable series in whole or part at a price equal to 100% of the principal amount of the notes to be redeemed plus an applicable premium and accrued and unpaid interest, if any, to but excluding the redemption date. The applicable premium for any note is the greater of: (1) 1.0% of the principal amount of such note, and (2) the excess, if any, of (a) the present value at the redemption date of all scheduled payments of interest plus principal on such note (excluding accrued but unpaid interest, if any, to, but excluding, the redemption date) computed using a discount rate equal to the Treasury Rate as of such redemption date plus 50 basis points, over (b) the principal amount of such note. At any time on or after May 1, 2026, in the case of the 2026 Senior Notes, and March 1, 2031, in the case of the 2031 Senior Notes, the Company may redeem the notes of the applicable series in whole or part at a price of 100% of the principal amount of the notes to be redeemed plus accrued and unpaid interest, if any, to but excluding the redemption date. If the Company experiences a change of control triggering event (as defined in the applicable indenture governing the applicable Senior Notes), the Company must offer to repurchase each series of Senior Notes at a repurchase price equal to 101% of the principal amount of the applicable notes to be repurchased, plus accrued and unpaid interest, if any, to, but excluding, the applicable repurchase date. In the event of default, the trustee or holders of at least 25% in aggregate principal amount of the applicable series of outstanding Senior Notes under the applicable indenture may declare all of the notes of the applicable series to be due and immediately payable. If the event of default is the result of specified events of bankruptcy, insolvency or reorganization, all of the notes of the applicable series will become due without any declaration or action by the trustee or holders. If there is a default in the payment of interest, the Company shall pay the defaulted interest plus, to the extent lawful, interest payable on the defaulted interest at the rate provided in the Senior Notes. Debt issuance costs related to the 2026 Senior Notes and 2031 Senior Notes were comprised of discounts and commissions payable to the initial purchasers of $22.5 million and third party offering costs of $5.7 million. Issuance costs are amortized to interest expense using the effective interest method at an effective interest rate of 3.06% and 3.69% for each of the respective terms of the 2026 Senior Notes and 2031 Senior Notes, respectively. Convertible Notes due in 2026 and 2027 On November 13, 2020, the Company issued an aggregate principal amount of $1.15 billion of convertible senior notes comprised of $575.0 million of convertible senior notes due 2026 ("2026 Convertible Notes") and $575.0 million of convertible senior notes due 2027 ("2027 Convertible Notes"). The 2026 Convertible Notes mature on May 1, 2026, unless earlier converted or repurchased, and bears a zero rate of interest. The 2027 Convertible Notes mature on November 1, 2027, unless earlier converted or repurchased, and bear interest at a rate of 0.25% payable semi-annually on May 1 and November 1 of each year. Both the 2026 Convertible Notes and 2027 Convertible Notes are convertible at an initial conversion rate of 3.3430 shares of the Company's Class A common stock per $1,000 principal amount, which is equivalent to an initial conversion price of approximately $299.13 per share of Class A common stock. Holders may convert their relevant series of notes at any time prior to the close of business on the business day immediately preceding February 1, 2026 and August 1, 2027 for the 2026 Convertible Notes and 2027 Convertible Notes, respectively, only under the following circumstances: (1) during any calendar quarter, commencing after the calendar quarter ending on March 31, 2021 (and only during such calendar quarter), if the last reported sale price of the Company’s Class A common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any five consecutive trading day period (the "measurement period") in which the trading price (as defined in the indenture governing the 2026 Convertible Notes and 2027 Convertible Notes) per $1,000 principal amount of 2026 Convertible Notes and 2027 Convertible 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 Class A common stock and the conversion rate on each such trading day; (3) if the Company calls any or all of the 2026 Convertible Notes and 2027 Convertible Notes for redemption, such relevant series of notes called for redemption may be converted at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date; or (4) upon the occurrence of specified corporate events, including certain distributions, the occurrence of a fundamental change (as defined in the indenture governing the 2026 Convertible Notes and 2027 Convertible Notes) or a transaction resulting in the Company’s Class A common stock converting into other securities or property or assets. In addition, upon occurrence of the specified corporate events prior to the maturity date, the Company would increase the conversion rate for a holder who elects to convert their relevant series of notes in connection with such an event in certain circumstances. On or after February 1, 2026 in the case of the 2026 Convertible Notes, and on or after August 1, 2027 in the case of the 2027 Convertible Notes, up until the close of business on the second scheduled trading day immediately preceding the maturity date, a holder of the relevant series of notes may convert all or any portion of its 2026 Convertible Notes or 2027 Convertible Notes regardless of the foregoing circumstances. Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of its Class A common stock, or a combination of cash and shares of its Class A common stock, at the Company’s election. The circumstances required to allow the holders to convert their 2026 Convertible Notes and 2027 Convertible Notes were not met during the nine months ended September 30, 2021. On or after November 5, 2023 for the 2026 Convertible Notes, and on or after November 5, 2024 for the 2027 Convertible Notes, the Company may redeem all or a portion of each series of convertible notes for cash at its option, if the last reported sale price of the Company's Class A common stock has been at least 130% of the conversion price for the relevant series of 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 2026 Convertible Notes and 2027 Convertible Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. In accounting for the issuance of the 2026 Convertible Notes and 2027 Convertible Notes, prior to the adoption of ASU No. 2020-06, the Company separated the relevant series of convertible notes into liability and equity components. The carrying amount of the liability component was calculated by measuring the fair value of a similar debt instrument that does not have an associated convertible feature. The carrying amount of the equity component representing the conversion option was $198.0 million and was determined by deducting the fair value of the liability component from the par value of the 2026 Convertible Notes and the 2027 Convertible Notes. The equity component was not re-measured as long as it continued to meet the conditions for equity classification. The excess of the principal amount of the liability component over its carrying amount ("debt discount") was amortized to interest expense at an effective interest rate of 3.35% and 3.66% for the 2026 Convertible Notes and 2027 Convertible Notes, respectively. Upon adoption of ASU No. 2020-06 on January 1, 2021, the Company reversed the separation of the debt and equity components and accounted for the Notes wholly as debt. The Company also reversed the amortization of the debt discount, with a cumulative adjustment to retained earnings on the adoption date. Debt issuance costs related to the 2026 Convertible Notes and 2027 Convertible Notes were comprised of discounts and commissions payable to the initial purchasers of $17.5 million and third party offering costs of $1.0 million. Prior to the adoption of ASU No. 2020-06, the Company allocated the total amount incurred to the liability and equity components of the 2026 Convertible Notes and 2027 Convertible Notes based on their relative values. Issuance costs attributable to the liability component were $15.4 million and were amortized to interest expense using the effective interest method. Issuance costs attributable to the equity component were netted with the equity component in stockholders’ equity. Upon adoption of ASU No. 2020-06 on January 1, 2021, the Company reversed the allocation of the issuance costs to the equity component and accounted for the entire amount as debt issuance cost that will be amortized as interest expense at an effective interest rate of 0.49% and 0.30% for each of the respective terms of the 2026 Convertible Notes and 2027 Convertible Notes, respectively, with a cumulative adjustment to retained earnings on the adoption date. Upon adoption of ASU No. 2020-06, the difference between the estimated fair value and the carrying value upon conversion is accounted for as a reduction to the related debt issuance costs, with the remainder recognized as additional paid in capital to reflect the par value of the shares issued. As of September 30, 2021, there has been no principal converted on either the 2026 Convertible Notes or 2027 Convertible Notes. As of September 30, 2021, the if-converted value of the 2026 Convertible Notes and 2027 Convertible Notes did not exceed the outstanding principal amount. Convertible Senior Notes due in 2025 On March 5, 2020, the Company issued an aggregate principal amount of $1.0 billion of convertible senior notes ("2025 Convertible Notes"). The 2025 Convertible Notes mature on March 1, 2025, unless earlier converted or repurchased, and bear interest at a rate of 0.1250% payable semi-annually on March 1 and September 1 of each year. The 2025 Convertible Notes are convertible at an initial conversion rate of 8.2641 shares of the Company's Class A common stock per $1,000 principal amount of 2025 Convertible Notes, which is equivalent to an initial conversion price of approximately $121.01 per share of Class A common stock. Holders may convert their 2025 Convertible Notes at any time prior to the close of business on the business day immediately preceding December 1, 2024 only under the following circumstances: (1) during any calendar quarter, commencing after the calendar quarter ending on June 30, 2020 (and only during such calendar quarter), if the last reported sale price of the Company’s Class A common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any five consecutive trading day period (the "measurement period") in which the trading price (as defined in the indenture governing the 2025 Convertible Notes) per $1,000 principal amount of 2025 Convertible 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 Class A common stock and the conversion rate on each such trading day; (3) if the Company calls any or all of the 2025 Convertible Notes for redemption, such 2025 Convertible Notes called for redemption may be converted at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date; or (4) upon the occurrence of specified corporate events, including certain distributions, the occurrence of a fundamental change (as defined in the indenture governing the 2025 Convertible Notes) or a transaction resulting in the Company’s Class A common stock converting into other securities or property or assets. In addition, upon occurrence of the specified corporate events prior to the maturity date, the Company would increase the conversion rate for a holder who elects to convert their 2025 Convertible Notes in connection with such an event in certain circumstances. On or after December 1, 2024, up until the close of business on the second scheduled trading day immediately preceding the maturity date, a holder may convert all or any portion of its 2025 Convertible Notes regardless of the foregoing circumstances. Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of its Class A common stock, or a combination of cash and shares of its Class A common stock, at the Company’s election. The Company may redeem for cash all or any part of the 2025 Convertible Notes, at its option, on or after March 5, 2023, if the last reported sale price of the Company's Class A common stock has been at least 130% of the conversion price for the 2025 Convertible 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 2025 Convertible Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. The circumstances to allow the holders to convert their 2025 Convertible Notes were met in the first quarter of 2021. In accounting for the issuance of the 2025 Convertible Notes, prior to the adoption of ASU No. 2020-06, the Company separated the 2025 Convertible Notes into liability and equity components. The carrying amount of the liability component was calculated by measuring the fair value of a similar debt instrument that does not have an associated convertible feature. The carrying amount of the equity component representing the conversion option was $154.6 million and was determined by deducting the fair value of the liability component from the par value of the 2025 Convertible Notes. The equity component is not remeasured as long as it continues to meet the conditions for equity classification. The excess of the principal amount of the liability component over its carrying amount ("debt discount") is amortized to interest expense over the term of the 2025 Convertible Notes at an effective interest rate of 3.81% over the contractual terms of the 2025 Convertible Notes. Upon adoption of ASU No. 2020-06 on January 1, 2021, the Company reversed the separation of the debt and equity components and accounted for the 2025 Convertible Notes wholly as debt. The Company also reversed the amortization of the debt discount, with a cumulative adjustment to retained earnings on the adoption date. Debt issuance costs related to the 2025 Convertible Notes were comprised of discounts and commissions payable to the initial purchasers of $14.3 million and third party offering costs of $0.9 million. Prior to the adoption of ASU No. 2020-06, the Company allocated the total amount incurred to the liability and equity components of the 2025 Convertible Notes based on their relative values. Issuance costs attributable to the liability component were $12.8 million and will be amortized to interest expense using the effective interest method over the contractual term. Issuance costs attributable to the equity component were netted with the equity component in stockholders’ equity. Upon adoption of ASU No. 2020-06 on January 1, 2021, the Company reversed the allocation of the issuance costs to the equity component and accounted for the entire amount as debt issuance cost that will be amortized as interest expense over the remaining term at an effective interest rate of 0.43% for the 2025 Convertible Notes with a cumulative adjustment to retained earnings on the adoption date. Upon adoption of ASU No. 2020-06, the difference between the estimated fair value and the carrying value upon conversion is accounted for as a reduction to the related debt issuance costs, with the remainder recognized as additional paid in capital to reflect the par value of the shares issued. As of September 30, 2021, there has been no principal converted on the 2025 Convertible Notes. As of September 30, 2021, the if-converted value of the 2025 Convertible Notes exceeded the outstanding principal amount by $1.0 billion. Convertible Senior Notes due in 2023 On May 25, 2018, the Company issued an aggregate principal amount of $862.5 million of convertible senior notes ("2023 Convertible Notes"). The 2023 Convertible Notes mature on May 15, 2023, unless earlier converted or repurchased, and bear interest at a rate of 0.50% payable semi-annually on May 15 and November 15 of each year. The 2023 Convertible Notes are convertible at an initial conversion rate of 12.8456 shares of the Company's Class A common stock per $1,000 principal amount of 2023 Convertible Notes, which is equivalent to an initial conversion price of approximately $77.85 per share of Class A common stock. Holders may convert their 2023 Convertible Notes at any time prior to the close of business on the business day immediately preceding February 15, 2023 only under the following circumstances: (1) during any calendar quarter (and only during such calendar quarter), if the last reported sale price of the Company’s Class A common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any five consecutive trading day period (the "measurement period") in which the trading price (as defined in the indenture governing the 2023 Convertible Notes) per $1,000 principal amount of 2023 Convertible 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 Class A common stock and the conversion rate on each such trading day; or (3) upon the occurrence of specified corporate events, including certain distributions, the occurrence of a fundamental change (as defined in the indenture governing the 2023 Convertible Notes) or a transaction resulting in the Company’s Class A common stock converting into other securities or property or assets. On or after February 15, 2023, up until the close of business on the second scheduled trading day immediately preceding the maturity date, a holder may convert all or any portion of its 2023 Convertible Notes regardless of the foregoing circumstances. Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of its Class A common stock, or a combination of cash and shares of its Class A common stock, at the Company’s election. The circumstances to allow the holders to convert their 2023 Convertible Notes were met in the fourth quarter of 2020 and continued to be met through September 30, 2021. As of September 30, 2021, certain holders of the 2023 Convertible Notes have converted an aggregate principal amount of $220.0 million of their 2023 Convertible Notes. The Company has settled the conversions through the issuance of 2.8 million shares of the Company's Class A common stock. In accounting for the issuance of the 2023 Convertible Notes, prior to the adoption of ASU No. 2020-06, the Company separated the 2023 Convertible Notes into liability and equity components. The carrying amount of the liability component was calculated by measuring the fair value of a similar debt instrument that does not have an associated convertible feature. The carrying amount of the equity component representing the conversion option was $155.3 million and was determined by deducting the fair value of the liability component from the par value of the 2023 Convertible Notes. The equity component is not re-measured as long as it continues to meet the conditions for equity classification. The excess of the principal amount of the liability component over its carrying amount ("debt discount") is amortized to interest expense over the term of the 2023 Convertible Notes at an effective interest rate of 4.69% over the contractual terms of the 2023 Convertible Notes. Upon adoption of ASU No. 2020-06 on January 1, 2021, the Company reversed the separation of the debt and equity components and accounted for the 2023 Convertible Notes wholly as debt. The Company also reversed the amortization of the debt discount, with a cumulative adjustment to retained earnings on the adoption date. Debt issuance costs related to the 2023 Convertible Notes comprised of discounts and commissions payable to the initial purchasers of $6.0 million and third party offering costs of $0.8 million. Prior to the adoption of ASU No. 2020-06, the Company allocated the total amount incurred to the liability and equity components of the 2023 Convertible Notes based on their relative values. Issuance costs attributable to the liability component were $5.6 million and will be amortized to interest expense using the effective interest method over the contractual term. Issuance costs attributable to the equity component were netted with the equity component in stockholders’ equity. Upon adoption of ASU No. 2020-06 on January 1, 2021, the Company reversed the allocation of the issuance costs to the equity component and accounted for the entire amount as debt issuance cost that will be amortized as interest expense over the remaining term at an effective interest rate of 0.66% for the 2023 Convertible Notes with a cumulative adjustment to retained earnings on the adoption date. Upon adoption of ASU No. 2020-06, the difference between the estimated fair value and the carrying value upon conversion is accounted for as a reduction to the related debt issuance costs, with the remainder recognized as additional paid in capital to reflect the par value of the shares issued. As of September 30, 2021, the if-converted value of the 2023 Convertible Notes exceeded the outstanding principal amount by $1.3 billion. Convertible Senior Notes due in 2022 On March 6, 2017, the Company issued an aggregate principal amount of $440.0 million of convertible senior notes ("2022 Convertible Notes"). The 2022 Convertible Notes mature on March 1, 2022, unless earlier converted or repurchased, and bear interest at a rate of 0.375% payable semi-annually on March 1 and September 1 of each year. The 2022 Convertible Notes are convertible at an initial conversion rate of 43.5749 shares of the Company's Class A common stock per $1,000 principal amount of 2022 Convertible Notes, which is equivalent to an initial conversion price of approximately $22.95 per share of Class A common stock. Holders may convert their 2022 Convertible Notes at any time prior to the close of business on the business day immediately preceding December 1, 2021 only under the following circumstances: (1) during any calendar quarter (and only during such calendar quarter), if the last reported sale price of the Company’s Class A common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any five consecutive trading day period (the "measurement period") in which the trading price (as defined in the indenture governing the 2022 Convertible Notes) per $1,000 principal amount of 2022 Convertible 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 Class A common stock and the conversion rate on each such trading day; or (3) upon the occurrence of specified corporate events, including certain distributions, the occurrence of a fundamental change (as defined in the indenture governing the 2022 Convertible Notes) or a transaction resulting in the Company’s Class A common stock converting into other securities or property or assets. On or after December 1, 2021, up until the close of business on the second scheduled trading day immediately preceding the maturity date, a holder may convert all or any portion of its 2022 Convertible Notes regardless of the foregoing circumstances. Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of its Class A common stock, or a combination of cash and shares of its Class A common stock, at the Company’s election. The circumstances required to allow the holders to convert their 2022 Convertible Notes were met in the fourth quarter of 2017 and continued to be met through September 30, 2021. As of September 30, 2021, certain holders of the 2022 Convertible Notes have converted an aggregate principal amount of $435.3 million of their 2022 Convertible Notes, of which $3.9 million was converted during the nine months ended September 30, 2021. The Company has settled the conversions through a combination of $219.4 million in cash and issuance of 16.3 million shares of the Company's Class A common stock. The conversions during the nine months ended September 30, 2021 were settled entirely in shares of the Company's Class A common stock. In accounting for the issuance of the 2022 Convertible Notes, prior to the adoption of ASU No. 2020-06, the Company separated the 2022 Convertible Notes into liability and equity components. The carrying amount of the liability component was calculated by measuring the fair value of a similar debt instrument that does not have an associated convertible feature. The carrying amount of the equity component representing the conversion option was $86.2 million and was determined by deducting the fair value of the liability component from the par value of the 2022 Convertible Notes. The equity component is not re-measured as long as it continues to meet the conditions for equity classification. The debt discount is amortized to interest expense over the term of the 2022 Convertible Notes at an effective interest rate of 5.34% over the contractual terms of the 2022 Convertible Notes. Upon adoption of ASU No. 2020-06 on January 1, 2021, the Company reversed the separation of the debt and equity components and accounted for the 2022 Convertible Notes wholly as debt. The Company also reversed the amortization of the debt discount, with a cumulative adjustment to retained earnings on the adoption date. Debt issuance costs related to the 2022 Convertible Notes comprised of discounts and commissions payable to the initial purchasers of $11.0 million and third party offering costs of $0.8 million. Prior to the adoption of ASU No. 2020-06, the Company allocated the total amount incurred to the liability and equity components of the 2022 Convertible Notes based on their relative values. Issuance costs attributable to the liability component were $9.4 million and will be amortized to interest expense using the effective interest method over the contractual term. Issuance costs attributable to the equity component were netted with the equity component in stockholders’ equity. Upon adoption of ASU No. 2020-06 on January 1, 2021, the Company reversed the allocation of the issuance costs to the equity component and accounted for the entire amount as debt issuance cost that will be amortized as interest expense over the remaining term at an effective interest rate of 0.93% for the 2022 Convertible Notes with a cumulative adjustment to retained earnings on the adoption date. Prior to the adoption of ASU No. 2020-06, the debt component associated with the 2022 Convertible Notes that were converted was accounted for as an extinguishment of debt, with the Company recording loss on extinguishment as the difference between the estimated fair value and the carrying value of such 2022 Convertible Notes. The equity component associated with the 2022 Convertible Notes that were converted was accounted for as a reacquisition of equity upon the conversion of such 2022 Convertible Notes. Upon adoption of ASU No. 2020-06, the difference between the estimated fair value and the carrying value upon conversion is accounted for as a reduction to the related debt issuance costs, with the remainder recognized as additional paid in capital to reflect the par value of the shares issued. There no longer is a gain or loss on extinguishment of debt recognized upon conversion, as the debt is settled in equity. As of September 30, 2021, the if-converted value of the 2022 Convertible Notes exceeded the outstanding principal amount by $44.1 million. The net carrying amount of the Notes were as follows (in thousands):
| Principal outstanding |  |  |  | Unamortized debt issuance costs |  | Net carrying value
September 30, 2021 |  |  |  |  |  |  |
2031 Senior Notes | $ | 1,000,000 |  |  |  |  | $ | (13,580) |  |  | $ | 986,420 |
2026 Senior Notes | 1,000,000 |  |  |  |  | (13,076) |  |  | 986,924 |
2027 Convertible Notes | 575,000 |  |  |  |  | (8,127) |  |  | 566,873 |
2026 Convertible Notes | 575,000 |  |  |  |  | (7,805) |  |  | 567,195 |
2025 Convertible Notes | 1,000,000 |  |  |  |  | (10,401) |  |  | 989,599 |
2023 Convertible Notes | 642,488 |  |  |  |  | (1,670) |  |  | 640,818 |
2022 Convertible Notes | 4,665 |  |  |  |  | (28) |  |  | 4,637 |
Total | $ | 4,797,153 |  |  |  |  | $ | (54,687) |  |  | $ | 4,742,466 |
As discussed above, upon the adoption of ASU No. 2020-06, the Company reversed the separation of the debt and equity components of the Convertible Notes, and accounted for the Convertible Notes wholly as debt. Additionally, the issuance costs of the Notes were accounted for as debt issuance costs in its entirety. Refer to Note 1, Description of Business and Summary of Significant Accounting Policies for further details on the impact of adoption.
| Principal outstanding |  | Unamortized debt discount |  | Unamortized debt issuance costs |  | Net carrying value
December 31, 2020 |  |  |  |  |  |  |
2027 Convertible Notes | $ | 575,000 |  |  | $ | (109,134) |  |  | $ | (7,370) |  |  | $ | 458,496 |
2026 Convertible Notes | 575,000 |  |  | (85,085) |  |  | (7,711) |  |  | 482,204 |
2025 Convertible Notes | 1,000,000 |  |  | (130,335) |  |  | (11,333) |  |  | 858,332 |
2023 Convertible Notes | 862,500 |  |  | (79,980) |  |  | (2,474) |  |  | 780,046 |
2022 Convertible Notes | 8,545 |  |  | (629) |  |  | (70) |  |  | 7,846 |
Total | $ | 3,021,045 |  |  | $ | (405,163) |  |  | $ | (28,958) |  |  | $ | 2,586,924 |
The net carrying amount of the equity component of the Convertible Notes as of December 31, 2020 were as follows (in thousands):
| Amount allocated to conversion option |  | Less: allocated issuance costs |  | Equity component, net
December 31, 2020 |  |  |  |  |
2027 Convertible Notes | $ | 111,000 |  |  | $ | (1,793) |  |  | $ | 109,207 |
2026 Convertible Notes | 87,000 |  |  | (1,405) |  |  | 85,595 |
2025 Convertible Notes | 154,600 |  |  | (2,342) |  |  | 152,258 |
2023 Convertible Notes | 155,250 |  |  | (1,231) |  |  | 154,019 |
2022 Convertible Notes | 1,674 |  |  | (45) |  |  | 1,629 |
Total | $ | 509,524 |  |  | $ | (6,816) |  |  | $ | 502,708 |
The Company recognized interest expense on the Notes as follows (in thousands):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
Contractual interest expense | $ | 17,047 |  |  | $ | 1,544 |  |  | $ | 27,272 |  |  | $ | 4,482 |
Amortization of debt issuance costs (i) | 2,868 |  |  | 17,516 |  |  | 7,005 |  |  | 47,624 |
Total | $ | 19,915 |  |  | $ | 19,060 |  |  | $ | 34,277 |  |  | $ | 52,106 |
(i) Upon adoption of ASU No. 2020-06, the debt discount associated with the equity component on convertible debt outstanding was reversed which resulted in a decrease in the amount of non-cash interest expense to be recognized going forward. Prior to the adoption of ASU No. 2020-06, the effective interest rate for the 2027 Convertible Notes, 2026 Convertible Notes, 2025 Convertible Notes, 2023 Convertible Notes, and 2022 Convertible Notes was 3.66%, 3.35%, 3.81%, 4.69%, and 5.34%, respectively. After the adoption of ASU No. 2020-06, the effective interest rates for the 2027 Convertible Notes, 2026 Convertible Notes, 2025 Convertible Notes, 2023 Convertible Notes, and 2022 Convertible Notes are 0.30%, 0.49%, 0.43%, 0.66%, and 0.93%, respectively. Convertible Note Hedge and Warrant Transactions In connection with the offering of the 2027 Convertible Notes, the Company entered into convertible note hedge transactions ("2027 convertible note hedges") with certain financial institution counterparties ("2027 Convertible Notes Counterparties") whereby the Company has the option to purchase a total of approximately 1.92 million shares of its Class A common stock at a price of approximately $299.13 per share. The total cost of the 2027 convertible note hedge transactions was $104.3 million. In addition, the Company sold warrants ("2027 warrants") to the 2027 Convertible Notes Counterparties whereby the 2027 Convertible Notes Counterparties have the option to purchase a total of 1.92 million shares of the Company’s Class A common stock at a price of approximately $414.18 per share for the 2027 warrants. The Company received $68.0 million in cash proceeds from the sale of the 2027 warrants. Taken together, the purchase of the 2027 convertible note hedges and sale of the 2027 warrants are intended to reduce dilution from the conversion of the 2027 Convertible Notes and/or offset any cash payments the Company is required to make in excess of the principal amount of the converted 2027 Convertible Notes, as the case may be, and to effectively increase the overall conversion price from approximately $299.13 per share to approximately $414.18 per share for the 2027 warrants. As these instruments are considered indexed to the Company's own stock and are considered equity classified, the 2027 convertible note hedges and 2027 warrants are recorded in stockholders’ equity, are not accounted for as derivatives and are not re-measured each reporting period. The net costs incurred in connection with the 2027 convertible note hedges and 2027 warrant transactions were recorded as a reduction to additional paid-in capital on the condensed consolidated balance sheets. In connection with the offering of the 2026 Convertible Notes, the Company entered into convertible note hedge transactions ("2026 convertible note hedges") with certain financial institution counterparties ("2026 Convertible Notes Counterparties") whereby the Company has the option to purchase a total of approximately 1.92 million shares of its Class A common stock at a price of approximately $299.13 per share. The total cost of the 2026 convertible note hedges was $84.6 million. In addition, the Company sold warrants ("2026 warrants") to the 2026 Convertible Notes Counterparties whereby the 2026 Convertible Notes Counterparties have the option to purchase a total of 1.92 million shares of the Company’s Class A common stock at a price of approximately $368.16 per share for the 2026 warrants. The Company received $64.6 million in cash proceeds from the sale of the 2026 warrants. Taken together, the purchase of the 2026 convertible note hedges and sale of the 2026 warrants are intended to reduce dilution from the conversion of the 2026 Convertible Notes and/or offset any cash payments the Company is required to make in excess of the principal amount of the converted 2026 Convertible Notes, as the case may be, and to effectively increase the overall conversion price from approximately $299.13 per share to approximately $368.16 per share for the 2026 warrants. As these instruments are considered indexed to the Company's own stock and are considered equity classified, the 2026 convertible note hedges and 2026 warrants are recorded in stockholders’ equity, are not accounted for as derivatives and are not remeasured each reporting period. The net costs incurred in connection with the 2026 convertible note hedges and 2026 warrants were recorded as a reduction to additional paid-in capital on the condensed consolidated balance sheets. In connection with the offering of the 2025 Convertible Notes, the Company entered into convertible note hedge transactions ("2025 convertible note hedges") with certain financial institution counterparties ("2025 Convertible Notes Counterparties") whereby the Company has the option to purchase a total of approximately 8.26 million shares of its Class A common stock at a price of approximately $121.01 per share. The total cost of the 2025 convertible note hedges was $149.2 million. In addition, the Company sold warrants ("2025 warrants") to the 2025 Convertible Notes Counterparties whereby the 2025 Convertible Notes Counterparties have the option to purchase a total of 8.26 million shares of the Company’s Class A common stock at a price of approximately $161.34 per share. The Company received $99.5 million in cash proceeds from the sale of the 2025 warrants. Taken together, the purchase of the 2025 convertible note hedges and sale of the 2025 warrants are intended to reduce dilution from the conversion of the 2025 Convertible Notes and/or offset any cash payments the Company is required to make in excess of the principal amount of the converted 2025 Convertible Notes, as the case may be, and to effectively increase the overall conversion price from approximately $121.01 per share to approximately $161.34 per share. As these instruments are considered indexed to the Company's own stock and are considered equity classified, the 2025 convertible note hedges and 2025 warrants are recorded in stockholders’ equity, are not accounted for as derivatives and are not remeasured each reporting period. The net costs incurred in connection with the 2025 convertible note hedges and 2025 warrants were recorded as a reduction to additional paid-in capital on the condensed consolidated balance sheets. In connection with the offering of the 2023 Convertible Notes, the Company entered into convertible note hedge transactions ("2023 convertible note hedges") with certain financial institution counterparties ("2018 Counterparties") whereby the Company has the option to purchase a total of approximately 11.1 million shares of its Class A common stock at a price of approximately $77.85 per share. The total cost of the 2023 convertible note hedges was $172.6 million. In addition, the Company sold warrants ("2023 warrants") to the 2018 Counterparties whereby the 2018 Counterparties have the option to purchase a total of 11.1 million shares of the Company’s Class A common stock at a price of approximately $109.26 per share. The Company received $112.1 million in cash proceeds from the sale of the 2023 warrants. Taken together, the purchase of the 2023 convertible note hedges and sale of the 2023 warrants are intended to reduce dilution from the conversion of the 2023 Convertible Notes and/or offset any cash payments the Company is required to make in excess of the principal amount of the converted 2023 Convertible Notes, as the case may be, and to effectively increase the overall conversion price from approximately $77.85 per share to approximately $109.26 per share. As these instruments are considered indexed to the Company's own stock and are considered equity classified, the 2023 convertible note hedges and 2023 warrants are recorded in stockholders’ equity, are not accounted for as derivatives and are not remeasured each reporting period. The net costs incurred in connection with the 2023 convertible note hedges and 2023 warrants were recorded as a reduction to additional paid-in capital on the condensed consolidated balance sheets. The Company also exercised a pro-rata portion of the 2023 convertible note hedges to offset the shares of the Company's Class A common stock issued to settle the conversion of the 2023 Convertible Notes. The Company has received 1.3 million shares of the Company's Class A common stock from the 2018 Counterparties as of September 30, 2021 In connection with the offering of the 2022 Convertible Notes, the Company entered into convertible note hedge transactions ("2022 convertible note hedges") with certain financial institution counterparties ("2017 Counterparties") whereby the Company has the option to purchase a total of approximately 19.2 million shares of its Class A common stock at a price of approximately $22.95 per share. The total cost of the 2022 convertible note hedge transactions was $92.1 million. In addition, the Company sold warrants ("2022 warrants") to the 2017 Counterparties whereby the 2017 Counterparties have the option to purchase a total of 19.2 million shares of the Company’s Class A common stock at a price of approximately $31.18 per share. The Company received $57.2 million in cash proceeds from the sale of the 2022 warrants. Taken together, the purchase of the 2022 convertible note hedges and sale of the 2022 warrants are intended to reduce dilution from the conversion of the 2022 Convertible Notes and/or offset any cash payments the Company is required to make in excess of the principal amount of the converted 2022 Convertible Notes, as the case may be, and to effectively increase the overall conversion price from approximately $22.95 per share to approximately $31.18 per share. As these instruments are considered indexed to the Company's own stock and are considered equity classified, the 2022 convertible note hedges and 2022 warrants are recorded in stockholders’ equity, are not accounted for as derivatives and are not remeasured each reporting period. The net costs incurred in connection with the 2022 convertible note hedges and 2022 warrants were recorded as a reduction to additional paid-in capital on the condensed consolidated balance sheets. The Company has exercised a pro-rata portion of the 2022 convertible note hedges to offset the shares of the Company's Class A common stock issued to settle the conversion of the 2022 Convertible Notes discussed above. The 2022 convertible note hedges were net share settled, and as of September 30, 2021, the Company has received 14.9 million shares of the Company's Class A common stock from the 2017 Counterparties, of which 5.5 million was received in the nine months ended September 30, 2021.

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