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Securitization (Tables) | 12 Months Ended
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Sep. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Condensed Consolidated Balance Sheet | The following table summarizes the impact of AEK on our consolidated balance sheets, for the periods indicated:
|  | September 30, 2025 |  | September 30, 2024
|  | (In thousands)
Restricted cash and cash equivalents |  | $ | 1,116 |  |  | $ | 1,516 |
Other current assets |  | $ | 1 |  |  | $ | 3 |
Securitized intangible asset, net |  | $ | 75,127 |  |  | $ | 82,844 |
Accrued interest |  | $ | 331 |  |  | $ | 365 |
Current maturities of securitized long-term debt |  | $ | 8,767 |  |  | $ | 8,207 |
Securitized long-term debt |  | $ | 68,236 |  |  | $ | 76,871 |
Schedule of Condensed Statement of Comprehensive Income | The following table summarizes the impact of AEK on our consolidated statements of comprehensive income, for the periods indicated:
|  | Year Ended September 30
|  | 2025 |  | 2024 |  | 2023
|  | (In thousands)
Operating revenues |  | $ | 12,408 |  |  | $ | 13,660 |  |  | $ | 2,743 |
Operation and maintenance expense |  | (559) |  |  | (427) |  |  | — |
Amortization expense |  | (7,717) |  |  | (8,715) |  |  | (1,398) |
Interest expense, net |  | (4,132) |  |  | (4,518) |  |  | (1,345) |
Income before income taxes |  | $ | — |  |  | $ | — |  |  | $ | — |
Schedule of Maturities of Long-term Debt | Maturities of long-term debt, excluding our finance lease obligations, at September 30, 2025 were as follows by fiscal years (in thousands):
2026 | $ | 10,000 |
2027 | 500,000 |
2028 | 150,000 |
2029 | 500,000 |
2030 | — |
Thereafter | 7,775,000 |
| $ | 8,935,000 |
The following table summarizes the maturities of the securitized long-term debt and the amortization expense related to the securitized intangible asset expected to be recognized in our consolidated statements of comprehensive income:
|  | Maturities of Securitized Long-Term Debt |  | Amortization Expense of Securitized Intangible Asset
For the fiscal year ending: |  | (In thousands)
2026 |  | $ | 8,767 |  |  | $ | 8,555 |
2027 |  | 9,086 |  |  | 9,001 |
2028 |  | 9,561 |  |  | 9,471 |
2029 |  | 10,060 |  |  | 9,966 |
2030 |  | 10,585 |  |  | 10,486 |
Thereafter |  | 28,944 |  |  | 27,648 |
Total |  | $ | 77,003 |  |  | $ | 75,127 |
Schedule of Amortization Expense of Securitized Intangible Asset | The following table summarizes the maturities of the securitized long-term debt and the amortization expense related to the securitized intangible asset expected to be recognized in our consolidated statements of comprehensive income:
|  | Maturities of Securitized Long-Term Debt |  | Amortization Expense of Securitized Intangible Asset
For the fiscal year ending: |  | (In thousands)
2026 |  | $ | 8,767 |  |  | $ | 8,555 |
2027 |  | 9,086 |  |  | 9,001 |
2028 |  | 9,561 |  |  | 9,471 |
2029 |  | 10,060 |  |  | 9,966 |
2030 |  | 10,585 |  |  | 10,486 |
Thereafter |  | 28,944 |  |  | 27,648 |
Total |  | $ | 77,003 |  |  | $ | 75,127 |

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