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Goodwill and Other Intangible Assets (Tables) | 6 Months Ended
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Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Changes in Carrying Amount of Goodwill | The changes in the carrying amount of goodwill for the six months ended March 31, 2023 are as follows (dollars in thousands):
|  | Total |
Balance as of September 30, 2022 |  | $ | 890,802 |
Effect of foreign currency translation |  |  | 13,248 |
Balance as of March 31, 2023 |  | $ | 904,050 |
Summary of Gross Carrying Amounts and Accumulated Amortization of Intangible Assets by Major Class | The following tables summarizes the gross carrying amounts and accumulated amortization of intangible assets by major class (dollars in thousands):
|  | March 31, 2023 |
|  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |  |  | Weighted Average Remaining Life (Years) |
Customer relationships |  | $ | 107,913 |  |  | $ | (102,925 | ) |  | $ | 4,988 |  |  |  | 2.0 |
Technology and patents |  |  | 89,752 |  |  |  | (89,441 | ) |  |  | 311 |  |  |  | 0.7 |
Total |  | $ | 197,665 |  |  | $ | (192,366 | ) |  | $ | 5,299 |  |  |  |
|  | September 30, 2022 |
|  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |  |  | Weighted Average Remaining Life (Years) |
Customer relationships |  | $ | 104,498 |  |  | $ | (95,315 | ) |  | $ | 9,183 |  |  |  | 1.7 |
Technology and patents |  |  | 88,600 |  |  |  | (88,083 | ) |  |  | 517 |  |  |  | 1.2 |
Total |  | $ | 193,098 |  |  | $ | (183,398 | ) |  | $ | 9,700 |  |  |  |

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