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v3.23.3

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020
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Deferred Tax Assets, Net [Abstract] |  |  |  |
Net operating loss carryforwards | $ 22,272 | $ 40,419 |  |
Foreign tax credits | 3,750 | 14,527 |  |
Capitalized research and development | 83,748 | 23,274 |  |
Pension benefits | 5,327 | 7,639 |  |
Prepaid expenses | 15,040 | 15,886 |  |
Deferred revenue | 5,902 | 2,146 |  |
Stock-based compensation | 19,684 | 19,486 |  |
Other reserves not currently deductible | 19,604 | 14,689 |  |
Amortization of intangible assets | 90,888 | 130,825 |  |
Research and development and other tax credits | 64,618 | 78,862 |  |
Lease liabilities | 50,102 | 46,672 |  |
Fixed assets | 83,796 | 78,249 |  |
Capital loss carryforward | 3,700 | 3,955 |  |
Other | 2,279 | 1,256 |  |
Gross deferred tax assets | 470,710 | 477,885 |  |
Valuation allowance | (21,695) | (22,283) | $ (52,085) | $ (205,423)
Total deferred tax assets | 449,015 | 455,602 |  |
Deferred Tax Liabilities, Net [Abstract] |  |  |  |
Acquired intangible assets not deductible | (263,178) | (118,360) |  |
Lease assets | (37,332) | (36,940) |  |
Pension prepayments | (1,808) | (2,622) |  |
Deferred revenue | (17,400) | (35,193) |  |
Depreciation | (5,779) | (6,937) |  |
Deferred income | (8,656) | (5,991) |  |
Prepaid commissions | (13,757) | (13,356) |  |
Other | (7,294) | (8,508) |  |
Total deferred tax liabilities | (355,204) | (227,907) |  |
Net deferred tax assets | $ 93,811 | $ 227,695 |  |

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