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GOODWILL AND INTANGIBLE ASSETS - Schedule of Intangible Assets Arising from Business Acquisitions (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Sep. 30, 2024
--- | --- | ---
Intangible Asset, Acquired, Finite-Lived [Line Items] |  |
Accumulated Amortization | $ 93,264 | $ 42,814
Currency Translation Adjustment | 14,202 |
Indefinite-Lived Intangible Assets [Line Items] |  |
Intangible assets, gross | 564,602 | 96,961
Intangible assets, net | 485,540 | $ 54,147
In-process research and development |  |
Indefinite-Lived Intangible Assets [Line Items] |  |
Indefinite-lived intangible assets (excluding goodwill) | $ 3,161 |
Developed technology |  |
Intangible Asset, Acquired, Finite-Lived [Line Items] |  |
Weighted average useful life | 14 years | 14 years
Gross Carrying Amount | $ 110,516 | $ 89,096
Accumulated Amortization | 47,278 | 40,047
Currency Translation Adjustment | 0 |
Net | $ 63,238 | $ 49,049
Customer relationships |  |
Intangible Asset, Acquired, Finite-Lived [Line Items] |  |
Weighted average useful life | 9 years | 15 years
Gross Carrying Amount | $ 432,200 | $ 0
Accumulated Amortization | 42,077 | 0
Currency Translation Adjustment | 14,202 |
Net | $ 404,325 | $ 0
Intellectual property |  |
Intangible Asset, Acquired, Finite-Lived [Line Items] |  |
Weighted average useful life | 13 years | 13 years
Gross Carrying Amount | $ 2,000 | $ 2,000
Accumulated Amortization | 821 | 662
Currency Translation Adjustment | 0 |
Net | $ 1,179 | $ 1,338
Trade name |  |
Intangible Asset, Acquired, Finite-Lived [Line Items] |  |
Weighted average useful life | 13 years | 13 years
Gross Carrying Amount | $ 16,725 | $ 5,865
Accumulated Amortization | 3,088 | 2,105
Currency Translation Adjustment | 0 |
Net | $ 13,637 | $ 3,760

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