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Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The following table outlines changes to the carrying amount of goodwill (in thousands):
| Goodwill
Balance at September 30, 2022 | $ | 365,147 |
Translation adjustments | 4,987 |
Balance at March 31, 2023 | $ | 370,134 |
Schedule of Finite-Lived Intangible Assets | Intangible assets subject to amortization consisted of the following (in thousands):
| March 31, 2023 |  | September 30, 2022
Intangible Assets, Net | Cost | Accumulated Amortization | Net |  | Cost | Accumulated Amortization | Net
Acquired patents and technology | $ | 356,935 |  | $ | (265,914) |  | $ | 91,021 |  |  | $ | 355,622 |  | $ | (253,080) |  | $ | 102,542 |
Customer relationships | 66,187 |  | (58,417) |  | 7,770 |  |  | 66,142 |  | (56,572) |  | 9,570 |
Other intangible assets | 23,028 |  | (22,943) |  | 85 |  |  | 22,973 |  | (22,820) |  | 153 |
Total | $ | 446,150 |  | $ | (347,274) |  | $ | 98,876 |  |  | $ | 444,737 |  | $ | (332,472) |  | $ | 112,265 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense | As of March 31, 2023, expected amortization expense of our intangible assets in future fiscal periods was as follows (in thousands):
Fiscal Year | Amortization Expense
Remainder of 2023 | $ | 12,349 |
2024 | 23,773 |
2025 | 8,860 |
2026 | 7,969 |
2027 | 7,285 |
Thereafter | 38,640 |
Total | $ | 98,876 |

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