Securitization (Tables)

12 Months Ended

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