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Debt (Tables) | 6 Months Ended
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Mar. 31, 2023
Debt Disclosure [Abstract] |
Schedule of Long-term Debt Obligations | As of March 31, 2023 and September 30, 2022, we had the following long-term debt obligations:
(in thousands) |  | March 31, 2023 |  |  | September 30, 2022 |
4.000% Senior notes due 2028 |  | $ | 500,000 |  |  | $ | 500,000 |
3.625% Senior notes due 2025 |  |  | 500,000 |  |  |  | 500,000 |
Credit facility revolving line(1) |  |  | 425,000 |  |  |  | 359,000 |
Credit facility term loan(1) |  |  | 500,000 |  |  |  | — |
Total debt |  |  | 1,925,000 |  |  |  | 1,359,000 |
Unamortized debt issuance costs for the senior notes(2) |  |  | (7,297 | ) |  |  | (8,372 | )
Total debt, net of issuance costs |  | $ | 1,917,703 |  |  | $ | 1,350,628 |
(1) Unamortized debt issuance costs related to the credit facility were $2.3 million included in Other current assets and $8.7 million included in Other assets on the Consolidated Balance Sheet as of March 31, 2023 and $2.7 million included in Other assets on the Consolidated Balance Sheet as of September 30, 2022. (2) Unamortized debt issuance costs for the senior notes are included in Long-term debt on the Consolidated Balance Sheets.

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