v3.26.1
GOODWILL AND INTANGIBLE ASSETS - Schedule of Intangible Assets Arising from Business Acquisitions (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Sep. 30, 2025
Intangible Asset, Finite-Lived, Acquired [Line Items]    
Gross Carrying Amount $ 561,495 $ 561,441
Accumulated Amortization (149,145) (93,264)
Foreign Currency Translation Adjustment 9,876 14,071
Net $ 422,226 $ 482,248
Developed technology    
Intangible Asset, Finite-Lived, Acquired [Line Items]    
Weighted Average Estimated Useful Lives 14 years 14 years
Gross Carrying Amount $ 110,725 $ 110,516
Accumulated Amortization (53,232) (47,278)
Foreign Currency Translation Adjustment 455 649
Net $ 57,948 $ 63,887
Customer relationships    
Intangible Asset, Finite-Lived, Acquired [Line Items]    
Weighted Average Estimated Useful Lives 9 years 9 years
Gross Carrying Amount $ 432,200 $ 432,200
Accumulated Amortization (91,002) (42,077)
Foreign Currency Translation Adjustment 9,190 13,093
Net $ 350,388 $ 403,216
Intellectual property    
Intangible Asset, Finite-Lived, Acquired [Line Items]    
Weighted Average Estimated Useful Lives 13 years 13 years
Gross Carrying Amount $ 2,000 $ 2,000
Accumulated Amortization (941) (821)
Foreign Currency Translation Adjustment 0 0
Net $ 1,059 $ 1,179
Trade name    
Intangible Asset, Finite-Lived, Acquired [Line Items]    
Weighted Average Estimated Useful Lives 13 years 13 years
Gross Carrying Amount $ 16,570 $ 16,725
Accumulated Amortization (3,970) (3,088)
Foreign Currency Translation Adjustment 231 329
Net $ 12,831 $ 13,966