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Debt - Schedule of Long-term Debt Obligations (Parenthetical) (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Sep. 30, 2022
--- | --- | ---
Debt Instrument [Line Items] |  |  |
Unamortized Debt Issuance Expense | [1] | $ 7,297 | $ 8,372
Other Current Assets | Line of Credit |  |  |
Debt Instrument [Line Items] |  |  |
Unamortized Debt Issuance Expense |  | 2,300 |
Other Noncurrent Assets | Line of Credit |  |  |
Debt Instrument [Line Items] |  |  |
Unamortized Debt Issuance Expense |  | $ 8,700 | $ 2,700
[1] | Unamortized debt issuance costs for the senior notes are included in Long-term debt on the Consolidated Balance Sheets.

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- Definition The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset. + References No definition available. + Details
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