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Goodwill and Intangible Assets | 6 Months Ended
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Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets | 6. Goodwill and Intangible Assets Goodwill and acquired intangible assets consisted of the following:
(in thousands) |  | March 31, 2025 |  |  | September 30, 2024 |
|  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Book Value |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Book Value |
Goodwill |  |  |  |  |  |  |  | $ | 3,444,104 |  |  |  |  |  |  |  |  | $ | 3,461,891 |
Intangible assets with finite lives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchased software |  | $ | 631,889 |  |  | $ | 451,196 |  |  | $ | 180,693 |  |  | $ | 634,439 |  |  | $ | 436,471 |  |  | $ | 197,968 |
Capitalized software |  |  | 22,877 |  |  |  | 22,877 |  |  |  | — |  |  |  | 22,877 |  |  |  | 22,877 |  |  |  | — |
Customer lists and relationships |  |  | 1,135,655 |  |  |  | 475,455 |  |  |  | 660,200 |  |  |  | 1,141,086 |  |  |  | 457,718 |  |  |  | 683,368 |
Trademarks and trade names |  |  | 37,780 |  |  |  | 22,879 |  |  |  | 14,901 |  |  |  | 37,961 |  |  |  | 21,821 |  |  |  | 16,140 |
Other |  |  | 3,900 |  |  |  | 3,900 |  |  |  | — |  |  |  | 3,941 |  |  |  | 3,941 |  |  |  | — |
Total intangible assets with finite lives |  | $ | 1,832,101 |  |  | $ | 976,307 |  |  | $ | 855,794 |  |  | $ | 1,840,304 |  |  | $ | 942,828 |  |  | $ | 897,476 |
Total goodwill and acquired intangible assets |  |  |  |  |  |  |  | $ | 4,299,898 |  |  |  |  |  |  |  |  | $ | 4,359,367 |
Changes in Goodwill were as follows:
(in thousands) |  |
Balance, October 1, 2024 | $ | 3,461,891 |
Foreign currency translation adjustment |  | (17,787 | )
Balance, March 31, 2025 | $ | 3,444,104 |
The aggregate amortization expense for intangible assets with finite lives is classified in our Consolidated Statements of Operations as follows:
(in thousands) |  | Three months ended |  |  | Six months ended |
|  | March 31, 2025 |  |  | March 31, 2024 |  |  | March 31, 2025 |  |  | March 31, 2024 |
Amortization of acquired intangible assets |  | $ | 11,380 |  |  | $ | 10,424 |  |  | $ | 22,820 |  |  | $ | 20,787 |
Cost of revenue |  |  | 8,131 |  |  |  | 9,584 |  |  |  | 16,431 |  |  |  | 19,150 |
Total amortization expense |  | $ | 19,511 |  |  | $ | 20,008 |  |  | $ | 39,251 |  |  | $ | 39,937 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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