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Fair Value Measurements (Tables) | 3 Months Ended
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Dec. 31, 2024
Fair Value Disclosures [Abstract] |
Schedule of Fair Value of Assets and Liabilities |
Table 8.1: Fair Value Measurements
| As of December 31, 2024
| Level 1 |  | Level 2 |  | Level 3 |  | Balance
| (in thousands)
Assets: |  |  |  |  |  |  |
Deferred compensation assets - Rabbi Trust | $ | 34,832 |  |  | $ | — |  |  | $ | — |  |  | $ | 34,832 |
Interest rate swaps - $450 million notional value | — |  |  | 13,388 |  |  | — |  |  | 13,388 |
Total assets | $ | 34,832 |  |  | $ | 13,388 |  |  | $ | — |  |  | $ | 48,220 |
Liabilities: |  |  |  |  |  |  |
Interest rate swaps - $200 million notional value | $ | — |  |  | $ | 880 |  |  | $ | — |  |  | $ | 880 |
Indemnification liability | — |  |  | — |  |  | 9,710 |  |  | 9,710 |
Total liabilities | $ | — |  |  | $ | 880 |  |  | $ | 9,710 |  |  | $ | 10,590 |
Schedule of Accumulated Other Comprehensive Income (Loss) |
Table 8.2: Details of Changes in Accumulated Other Comprehensive Loss by Category
| Foreign currency translation adjustment |  | Net unrealized gain on derivatives, net of tax |  | Total
| (in thousands)
Balance as of September 30, 2024 | $ | (39,225) |  |  | $ | 6,765 |  |  | $ | (32,460) |
Other comprehensive income before reclassifications | (10,820) |  |  | 4,912 |  |  | (5,908) |
Amounts reclassified from accumulated other comprehensive loss | 21,272 |  |  | (2,458) |  |  | 18,814 |
Net current period other comprehensive losses | 10,452 |  |  | 2,454 |  |  | 12,906 |
Balance as of December 31, 2024 | $ | (28,773) |  |  | $ | 9,219 |  |  | $ | (19,554) |

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