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Senior Notes (Tables) | 12 Months Ended
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Sep. 30, 2022
Debt Disclosure [Abstract] |
Principal Amounts Carrying amounts and Fair Values of Senior Notes | The following table presents the face values and fair values for the Senior Notes at September 30, 2022 and 2021:
| September 30, 2022 |  | September 30, 2021
| Face Value (*) |  | Fair Value |  | Face Value (*) |  | Fair Value
| (In thousands)
The 2018 Senior Notes | $ | 400,000 |  |  | $ | 381,500 |  |  | $ | 400,000 |  |  | $ | 453,000 |
The 2019 Senior Notes and the 2021 Senior Notes | 900,000 |  |  | 767,250 |  |  | 350,000 |  |  | 357,000 |
Total | $ | 1,300,000 |  |  | $ | 1,148,750 |  |  | $ | 750,000 |  |  | $ | 810,000 |
(*) The carrying value of the Senior Notes was the face value reduced by the net debt issuance costs of $14.3 million and $9.0 million at September 30, 2022 and 2021, respectively.
Future Principal Payments For the Senior Notes | Future principal payments for the Senior Notes are as follows:
Year Ending September 30, | (In thousands)
2026 | 400,000 |
2027 | — |
Thereafter | 900,000 |
Total | $ | 1,300,000 |

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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
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