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v3.25.1

Goodwill and Other Identifiable Intangible Assets, Net (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2025 | Mar. 31, 2024 | Sep. 30, 2024
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross carrying amount | $ 436,527 |  | $ 436,527 |  | $ 436,311
Accumulated amortization | (194,461) |  | (194,461) |  | (183,402)
Net | 242,066 |  | 242,066 |  | 252,909
Goodwill | 341,669 |  | 341,669 |  | 342,774
Purchased and Core Technology |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross carrying amount | 84,928 |  | 84,928 |  | 85,041
Accumulated amortization | (65,448) |  | (65,448) |  | (63,654)
Net | 19,480 |  | 19,480 |  | 21,387
License Agreements |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross carrying amount | 112 |  | 112 |  | 112
Accumulated amortization | (112) |  | (112) |  | (112)
Net | 0 |  | 0 |  | 0
Patents and Trademarks |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross carrying amount | 40,714 |  | 40,714 |  | 40,335
Accumulated amortization | (23,684) |  | (23,684) |  | (22,047)
Net | 17,030 |  | 17,030 |  | 18,288
Customer Relationships |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross carrying amount | 309,173 |  | 309,173 |  | 309,223
Accumulated amortization | (103,617) |  | (103,617) |  | (95,989)
Net | 205,556 |  | 205,556 |  | 213,234
Non-compete Agreements |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross carrying amount | 600 |  | 600 |  | 600
Accumulated amortization | (600) |  | (600) |  | (600)
Net | 0 |  | 0 |  | 0
Order backlog |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross carrying amount | 1,000 |  | 1,000 |  | 1,000
Accumulated amortization | (1,000) |  | (1,000) |  | (1,000)
Net | 0 |  | 0 |  | $ 0
Cost of Sales and General and Administrative Expense |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Amortization expense | $ 5,200 | $ 6,100 | $ 11,000 | $ 12,300 |

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