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Indebtedness (Tables) | 12 Months Ended
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Dec. 31, 2024
Debt Disclosure [Abstract] |
Schedule of Debt | As of December 31, 2024 and 2023, respectively, debt consisted of the following (in thousands, except percentages):
|  | December 31, 2024 |  | December 31, 2023 |  | Unused Borrowing Capacity (1) |  | Weighted Average Interest Rate at December 31, 2024 (2) |  | Weighted Average Interest Rate at December 31, 2023 (2) |  | Contractual Interest Rate (3) |  | Contractual Maturity Date
Recourse debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit (4) |  | $ | 384,226 |  |  | $ | 539,502 |  |  | $ | — |  |  | 8.45% |  | 8.89% |  | SOFR +3.25% |  | March 2027
Convertible Senior Notes due 2026 (5) |  | 7,687 |  |  | 397,642 |  |  | — |  |  | —% |  | —% |  | —% |  | February 2026
Convertible Senior Notes due 2030 (6) |  | 483,187 |  |  | — |  |  | — |  |  | 4.00% |  | —% |  | 4% |  | March 2030
Total recourse debt |  | 875,100 |  |  | 937,144 |  |  | — |  |  |  |  |  |  |  |  |
Unamortized debt discount |  | (11,454) |  |  | (4,775) |  |  | — |  |  |  |  |  |  |  |  |
Total recourses debt, net |  | 863,646 |  |  | 932,369 |  |  | — |  |  |  |  |  |  |  |  |
Non-recourse debt (7) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior revolving and delayed draw loans (8) |  | 2,412,400 |  |  | 1,886,300 |  |  | 61,500 |  |  | 7.24% |  | 7.59% |  | SOFR +2.35% - 3.10% |  | March 2027 - February 2028
Senior non-revolving loans (9) |  | 2,325,558 |  |  | 2,226,343 |  |  | — |  |  | 6.66% |  | 7.07% |  | 4.66% - 6.93%; SOFR +1.85% - 2.25% |  | September 2026 - January 2054
Subordinated revolving and delayed draw loans (8) |  | 20,400 |  |  | 146,000 |  |  | — |  |  | 13.62% |  | 12.01% |  | SOFR +9.10% |  | March 2027
Subordinated loans (10)(11)(12) |  | 2,691,534 |  |  | 2,110,693 |  |  | — |  |  | 9.36% |  | 9.18% |  | 7.00% - 10.61%; SOFR +6.50% - 6.90% |  | April 2027 - January 2042
Securitized loans |  | 4,705,549 |  |  | 3,450,794 |  |  | — |  |  | 5.08% |  | 4.61% |  | 2.27% - 6.60% |  | April 2048 - October 2059
Total non-recourse debt |  | 12,155,441 |  |  | 9,820,130 |  |  | 61,500 |  |  |  |  |  |  |  |  |
Unamortized debt (discount) premium, net |  | (117,595) |  |  | (80,571) |  |  | — |  |  |  |  |  |  |  |  |
Total non-recourse debt, net |  | 12,037,846 |  |  | 9,739,559 |  |  | 61,500 |  |  |  |  |  |  |  |  |
Total debt, net |  | $ | 12,901,492 |  |  | $ | 10,671,928 |  |  | $ | 61,500 |  |  |  |  |  |  |  |  |
(1)Represents the additional amount the Company could borrow, if any, based on the state of its existing assets as of December 31, 2024. (2)Reflects weighted average contractual, unhedged rates. See Note 11, Derivatives, for hedge rates. (3)Ranges shown reflect fixed interest rate and rates using SOFR, as applicable. (4)The working capital facility (the “Facility”) was amended in October 2024 and its total commitment of up to $447.5 million is secured by substantially all of the unencumbered assets of the Company, as well as ownership interests in certain subsidiaries of the Company. Borrowings under the Facility may be designated as Base Rate Loans or Term SOFR Loans, subject to certain terms and conditions under the Credit Agreement. Base Rate Loans accrue interest at a rate per year equal to 2.25% to 2.75% depending on total outstanding balance as a percentage of total commitment plus the highest of (a) the federal funds rate plus 0.50%, (b) the interest rate determined from time to time by the Administrative Agent as its prime rate and notified to the Company, (c) the Adjusted Term SOFR Rate (defined below) for a one-month interest period in effect on such day (or if such day is not a business day, the immediately preceding business day) plus 1.00% and (d) 0.00%. Term SOFR Loans accrue interest at a rate per annum equal to (a) 3.25% to 3.75% depending on total outstanding balance as a percentage of total commitment plus (b) the greater of (i) 0.00% and (ii) the sum of (x) the forward-looking term rate for a period comparable to the applicable available tenor based on SOFR that is published by CME Group Benchmark Administration Ltd or a successor for the applicable interest period and (y) (1) if the applicable interest period is one month, 0.11448%, (2) if the applicable interest period is three months, 0.26161% or (c) if the applicable interest period is six months, 0.42826% (the rate pursuant to clause (b), the “Adjusted Term SOFR Rate”). The maturity date of this facility was automatically extended to March 1, 2027 in September 2024 as the Company had funds on deposit in the Convertible Debt Reserve Account equal to the amount sufficient to repay at the scheduled maturity all of its 0% Senior Convertible Notes due 2026 that were outstanding as of September 2024. This facility is subject to various restrictive covenants, such as the completion and presentation of audited consolidated financial statements, maintaining a minimum modified interest coverage ratio, a minimum modified current ratio, a maximum modified leverage ratio, and a minimum unencumbered cash balance, in each case, tested quarterly. The Company was in compliance with all debt covenants as of December 31, 2024. (5)Convertible senior notes due 2026 (the "2026 Notes") under this category with an outstanding balance of $7.7 million as of December 31, 2024 will not bear regular interest, and the principal amount of the 2026 Notes will not accrete. The 2026 Notes may bear special interest under specified circumstances relating to the Company’s failure to comply with its reporting obligations under the Indenture or if the 2026 Notes are not freely tradeable as required by the indenture. The 2026 Notes will mature on February 1, 2026, unless earlier repurchased by the Company, redeemed by the Company or converted pursuant to their terms. The initial conversion rate of the Notes is 8.4807 shares of the Company’s common stock, par value $0.0001 per share, per $1,000 principal amount of 2026 Notes, which is equivalent to an initial conversion price of approximately $117.91 per share. The conversion rate will be subject to adjustment upon the occurrence of certain specified events but will not be adjusted for any accrued and unpaid special interest. In addition, upon the occurrence of a make-whole fundamental change or an issuance of a notice of redemption, the Company will, in certain circumstances, increase the conversion rate by a number of additional shares for a holder that elects to convert its 2026 Notes in connection with such make-whole fundamental change or notice of redemption. The debt discount recorded on the 2026 Notes is being amortized to interest expense at an effective interest rate of 0.57%. As of December 31, 2024, $7.7 million of the debt discount was amortized to interest expense inception to date. In connection with the offering of the 2026 Notes, the Company entered into privately negotiated capped call transactions (the “2026 Capped Calls”) with certain of the initial purchasers and/or their respective affiliates at a cost of approximately $28.0 million. The 2026 Capped Calls are classified as equity and were recorded to additional paid-in-capital within stockholders’ equity as of March 31, 2021. The 2026 Capped Calls each have an initial strike price of approximately $117.91 per share, subject to certain adjustments, which corresponds to the initial conversion price of the 2026 Notes. The 2026 Capped Calls have initial cap prices of $157.22 per share. The 2026 Capped Calls cover, subject to anti-dilution adjustments, approximately 3.4 million shares of common stock. The 2026 Capped Calls are expected generally to reduce the potential dilution to the common stock upon any conversion of 2026 Notes and/or offset any cash payments the Company is required to make in excess of the principal amount of the 2026 Notes, as the case may be, in the event the market price per share of common stock, as measured under the 2026 Capped Calls, is greater than the strike price of the 2026 Capped Call, with such offset subject to a cap. If, however, the market price per share of the common stock, as measured under the 2026 Capped Calls, exceeds the cap price of the 2026 Capped Calls, there would be dilution and/or there would not be an offset of such potential cash payments, in each case, to the extent that the then-market price per share of the common stock exceeds the cap price. The final components of the 2026 Capped Calls are scheduled to expire on January 29, 2026. None of the conversion criteria has been met as of December 31, 2024. (6)Convertible senior notes due 2030 (the "2030 Notes" and, together with the 2026 Notes, the "Notes") under this category with an outstanding balance of $483.2 million as of December 31, 2024 will bear regular interest at 4.00% per annum, and the principal amount of the 2030 Notes will not accrete. The 2030 Notes may bear special interest under specified circumstances relating to the Company’s failure to comply with its reporting obligations under the Indenture or if the 2030 Notes are not freely tradeable as required by the indenture. The 2030 Notes will mature on March 1, 2030, unless repurchased by the Company, redeemed by the Company or converted pursuant to their terms prior to maturity. The initial conversion rate of the 2030 Notes is 61.3704 shares of the Company’s common stock, par value $0.0001 per share, per $1,000 principal amount of 2030 Notes, which is equivalent to an initial conversion price of approximately $16.29 per share. The conversion rate will be subject to adjustment upon the occurrence of certain specified events but will not be adjusted for any accrued and unpaid special interest. In addition, upon the occurrence of a make-whole fundamental change or an issuance of a notice of redemption, the Company will, in certain circumstances, increase the conversion rate by a number of additional shares for a holder that elects to convert its 2030 Notes in connection with such make-whole fundamental change or notice of redemption. The debt discount recorded on the 2030 Notes is being amortized to interest expense at an effective interest rate of 4.51%. As of December 31, 2024, $1.6 million of the debt discount was amortized to interest expense inception to date. In connection with the offering of the 2030 Notes, the Company entered into privately negotiated capped call transactions (the “2030 Capped Calls”) with certain of the initial purchasers and/or their respective affiliates at a cost of approximately $38.4 million. The 2030 Capped Calls are classified as equity and were recorded to additional paid-in-capital within stockholders’ equity as of March 31, 2024. The 2030 Capped Calls each have an initial strike price of approximately $16.29 per share, subject to certain adjustments, which corresponds to the initial conversion price of the 2030 Notes. The 2030 Capped Calls have initial cap prices of $22.37 per share. The 2030 Capped Calls cover, subject to anti-dilution adjustments, approximately 29.7 million shares of common stock. The 2030 Capped Calls are expected generally to reduce the potential dilution to the common stock upon any conversion of 2030 Notes and/or offset any cash payments the Company is required to make in excess of the principal amount of the 2030 Notes, as the case may be, in the event the market price per share of common stock, as measured under the 2030 Capped Calls, is greater than the strike price of the 2030 Capped Call, with such offset subject to a cap. If, however, the market price per share of the common stock, as measured under the 2030 Capped Calls, exceeds the cap price of the 2030 Capped Calls, there would be dilution and/or there would not be an offset of such potential cash payments, in each case, to the extent that the then-market price per share of the common stock exceeds the cap price. The final components of the 2030 Capped Calls are scheduled to expire on February 27, 2030. None of the conversion criteria has been met as of December 31, 2024. (7)Certain loans under this category are part of project equity transactions. (8)Pursuant to the terms of the aggregation facilities within this category the Company may draw up to an aggregate principal amount of $2.8 billion in revolver borrowings depending on the available borrowing base at the time. (9)Loans under this category with a fixed rate had a total outstanding balance of $888.6 million as of December 31, 2024. (10)A loan under this category with an outstanding balance of $152.5 million as of December 31, 2024 contains a put option that can be exercised beginning in 2036 that would require the Company to pay off the entire loan on November 30, 2037. (11)Loans under this category with a floating rate had a total outstanding balance of $646.4 million as of December 31, 2024. (12)A loan under this category with an outstanding balance of $217.5 million as of December 31, 2024 and a maturity date of June 28, 2026 was amended on January 31, 2025 to extend the maturity date to June 28, 2027 and upsize the facility by $35.0 million.
Schedule of Aggregate Future Principal Payments for Debt | The aggregate future principal payments for debt as of December 31, 2024 are as follows (in thousands):
2025 |  | $ | 245,745 |
2026 |  | 865,755 |
2027 |  | 1,531,774 |
2028 |  | 2,567,435 |
2029 |  | 1,244,672 |
Thereafter |  | 6,575,160 |
Subtotal |  | 13,030,541 |
Debt discount, net |  | (129,049) |
Total |  | $ | 12,901,492 |

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