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Income Taxes (Tables) | 12 Months Ended
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Sep. 30, 2024
Income Tax Disclosure [Abstract] |
Provision for Income Taxes | The provision for income taxes was as follows during fiscal 2024, 2023 and 2022:
| Year ended September 30,
| 2024 |  | 2023 |  | 2022
| (In thousands)
Current: |  |  |  |  |
Federal | $ | 110,402 |  |  | $ | 112,456 |  |  | $ | 50,403 |
State | 10,199 |  |  | 16,844 |  |  | 8,952 |
Foreign | 35,943 |  |  | 42,327 |  |  | 30,597 |
| 156,544 |  |  | 171,627 |  |  | 89,952 |
Deferred: |  |  |  |  |
Federal | (26,227) |  |  | (37,884) |  |  | 8,165 |
State | (1,712) |  |  | (15,025) |  |  | 507 |
Foreign | 609 |  |  | 5,531 |  |  | (856) |
| (27,330) |  |  | (47,378) |  |  | 7,816 |
Total provision | $ | 129,214 |  |  | $ | 124,249 |  |  | $ | 97,768 |
Deferred Tax Assets and Liabilities | Deferred tax assets and liabilities at September 30, 2024 and 2023 were as follows:
| September 30,
| 2024 |  | 2023
| (In thousands)
Deferred tax assets: |  |  |
Loss and credit carryforwards | $ | 7,717 |  |  | $ | 12,309 |
Compensation benefits | 32,093 |  |  | 30,490 |
Operating lease liabilities | 7,881 |  |  | 9,396 |
Research and development costs | 67,795 |  |  | 34,730 |
Other assets | 18,241 |  |  | 17,327 |
| 133,727 |  |  | 104,252 |
Less: valuation allowance | — |  |  | (2,183) |
Total deferred tax assets | 133,727 |  |  | 102,069 |
Deferred tax liabilities: |  |  |
Intangible assets | (7,812) |  |  | (7,226) |
Deferred commission | (14,484) |  |  | (14,017) |
Operating lease right-of-use assets | (7,240) |  |  | (6,228) |
Other liabilities | (17,678) |  |  | (15,462) |
Total deferred tax liabilities | (47,214) |  |  | (42,933) |
Deferred tax assets, net | $ | 86,513 |  |  | $ | 59,136 |
Reconciliation Between Federal Statutory Income Tax Rate and Effective Tax Rate | A reconciliation of the provision for income taxes, with the amount computed by applying the U.S. federal statutory income tax rate of 21% to income before provision for income taxes for fiscal 2024, 2023 and 2022 is shown below:
| Year Ended September 30,
| 2024 |  | 2023 |  | 2022
| (In thousands)
Income tax provision at U.S. federal statutory rate | $ | 134,825 |  |  | $ | 116,261 |  |  | $ | 98,975 |
State income taxes, net of U.S. federal benefit | 13,109 |  |  | 14,135 |  |  | 8,359 |
Foreign tax rate differential | 6,675 |  |  | 9,489 |  |  | 3,058 |
Research credits | (5,472) |  |  | (3,600) |  |  | (5,932) |
Valuation allowance | (2,183) |  |  | (14,451) |  |  | (11,768) |
Excess tax benefits relating to share-based compensation | (14,907) |  |  | (949) |  |  | 702 |
GILTI, FDII, BEAT and FTC | (9,265) |  |  | (9,010) |  |  | (2,491) |
Other | 6,432 |  |  | 12,374 |  |  | 6,865 |
Recorded income tax provision | $ | 129,214 |  |  | $ | 124,249 |  |  | $ | 97,768 |
Schedule of Unrecognized Tax Benefits Roll Forward | A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
| Year Ended September 30,
| 2024 |  | 2023 |  | 2022
| (In thousands)
Gross unrecognized tax benefits at beginning of year | $ | 13,849 |  |  | $ | 12,980 |  |  | $ | 10,897 |
Gross increases for tax positions in prior years | 4,769 |  |  | — |  |  | 593 |
Gross decreases for tax positions in prior years | (1,956) |  |  | (1,127) |  |  | — |
Gross increases based on tax positions related to the current year | 4,277 |  |  | 3,650 |  |  | 3,250 |
Decreases for settlements and payments | — |  |  | (523) |  |  | — |
Decreases due to statute expiration | (1,060) |  |  | (1,131) |  |  | (1,760) |
Gross unrecognized tax benefits at end of year | $ | 19,879 |  |  | $ | 13,849 |  |  | $ | 12,980 |

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