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Debt (Tables) | 12 Months Ended
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Sep. 30, 2025
Debt Disclosure [Abstract] |
Schedule of Debt | The following table represents our debt at carrying value at September 30, 2025 and 2024:
| September 30, 2025 |  | September 30, 2024
| (In thousands)
Current maturities on debt: |  |  |
The $300 Million Term Loan | $ | — |  |  | $ | 15,000 |
The 2018 Senior Notes | 400,000 |  |  | — |
Less: debt issuance costs | (459) |  |  | — |
Current maturities on debt | 399,541 |  |  | 15,000 |
Long-term debt: |  |  |
Revolving line of credit | 275,000 |  |  | 210,000 |
The $300 Million Term Loan | — |  |  | 243,750 |
The $450 Million Term Loan | — |  |  | 450,000 |
The 2018 Senior Notes | — |  |  | 400,000 |
The 2019 Senior Notes and the 2021 Senior Notes | 900,000 |  |  | 900,000 |
The 2025 Senior Notes | 1,500,000 |  |  | — |
Less: debt issuance costs | (18,850) |  |  | (9,729) |
Long-term debt | 2,656,150 |  |  | 2,194,021 |
Total debt | $ | 3,055,691 |  |  | $ | 2,209,021 |
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments | The following table presents the face values and fair values for the Senior Notes at September 30, 2025 and 2024:
| September 30, 2025 |  | September 30, 2024
| Face Value |  | Fair Value |  | Face Value |  | Fair Value
| (In thousands)
The 2018 Senior Notes | $ | 400,000 |  |  | $ | 399,500 |  |  | $ | 400,000 |  |  | $ | 399,500 |
The 2019 Senior Notes and the 2021 Senior Notes | 900,000 |  |  | 875,250 |  |  | 900,000 |  |  | 864,000 |
The 2025 Senior Notes | 1,500,000 |  |  | 1,518,750 |  |  | — |  |  | — |
Total | $ | 2,800,000 |  |  | $ | 2,793,500 |  |  | $ | 1,300,000 |  |  | $ | 1,263,500 |
Schedule of Future Principal Payments on Term Loans | Future principal payments for the Senior Notes are as follows:
Year Ending September 30, | (In thousands)
2026 | $ | 400,000 |
2027 | — |
2028 | 900,000 |
2029 | — |
2030 | — |
Thereafter | 1,500,000 |
Total | $ | 2,800,000 |

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