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Acquisitions and Disposition of Businesses - Additional Information (Details) $ in Thousands |  |  |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 04, 2023 USD ($) Employees | Oct. 02, 2023 USD ($) | Jan. 03, 2023 USD ($) Employees | Jun. 01, 2022 USD ($) | Jun. 30, 2025 USD ($) | Sep. 30, 2023 USD ($) | Mar. 31, 2023 USD ($) | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business combination, acquisition and transaction related costs |  |  |  |  |  |  |  | $ 9,100 | $ 3,100 | $ 18,700
Borrowings under credit facility |  |  |  |  |  |  |  | 860,000 | 1,084,845 | 1,540,000
Revenue |  |  |  |  |  |  |  | $ 2,739,226 | $ 2,298,472 | 2,097,053
Acquired finite-lived intangible asset, weighted average useful life |  |  |  |  |  |  |  | 16 years |  |
Gain on achieving performance milestones with contingent consideration |  |  |  |  |  |  |  | $ 13,100 |  |
Customer relationships |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible asset, weighted average useful life |  |  |  |  |  |  |  | 17 years |  |
Purchased Software |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible asset, weighted average useful life |  |  |  |  |  |  |  | 11 years |  |
Trademarks |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible asset, weighted average useful life |  |  |  |  |  |  |  | 11 years |  |
Term Loan Facility |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Borrowings under credit facility |  |  | $ 500,000 |  |  |  |  |  |  |
Pure Systems |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Payments to acquire business, net of cash | $ 93,500 |  |  |  |  |  |  |  |  |
Number Of Employees | Employees | 50 |  |  |  |  |  |  |  |  |
Pure Systems | Customer relationships |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible asset, weighted average useful life | 18 years |  |  |  |  |  |  |  |  |
Pure Systems | Purchased Software |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible asset, weighted average useful life | 10 years |  |  |  |  |  |  |  |  |
Pure Systems | Trademarks |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible asset, weighted average useful life | 10 years |  |  |  |  |  |  |  |  |
Servicemax acquisition |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Payments to acquire business, net of cash |  |  | 1,448,200 |  |  |  |  |  |  |
Deferred acquisition payments |  | $ 650,000 | 650,000 |  |  |  |  |  |  | 650,000
Preliminary purchase price |  |  | 828,200 |  |  |  |  |  |  |
Payments to acquire business |  | 620,000 | $ 620,000 |  |  |  |  |  |  |
Number Of Employees | Employees |  |  | 500 |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | $ 137,600
Increase in Goodwill |  |  |  |  |  | $ 300 |  |  |  |
Imputed interest payable |  | $ 30,000 |  |  |  |  |  |  |  |
Servicemax acquisition | Net Tax Liablity [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Increase in net tax liability |  |  |  |  |  |  | $ 3,200 |  |  |
Servicemax acquisition | Customer relationships |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible asset, weighted average useful life |  |  | 20 years |  |  |  |  |  |  |
Increase in customer relationships |  |  |  |  |  |  | $ 3,500 |  |  |
Servicemax acquisition | Purchased Software |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible asset, weighted average useful life |  |  | 10 years |  |  |  |  |  |  |
Servicemax acquisition | Trademarks |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible asset, weighted average useful life |  |  | 10 years |  |  |  |  |  |  |
Servicemax acquisition | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Borrowings under credit facility |  |  | $ 630,000 |  |  |  |  |  |  |
Other Acquisitions |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Payments to acquire business, net of cash |  |  |  |  | $ 7,900 |  |  |  |  |
Preliminary purchase price |  |  |  |  | 6,500 |  |  |  |  |
Contingent consideration payable |  |  |  |  | $ 1,400 |  |  |  |  |
PLM Services Business Disposition |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Total consideration |  |  |  | $ 60,400 |  |  |  |  |  |
Cash Consideration |  |  |  | 32,500 |  |  |  |  |  |
Contingent Consideration |  |  |  | 20,000 |  |  |  |  |  |
PLM Services Business Disposition | Service To Be Performed [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Non Cash Consideration |  |  |  | $ 28,000 |  |  |  |  |  |

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