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GOODWILL AND INTANGIBLES - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2023
Goodwill [Line Items]      
Goodwill $ 192,917 $ 329,393 $ 327,864
Goodwill, impairment loss $ 136,612    
Goodwill Impairment Loss Statement of Income or Comprehensive Income {Extensible Enumeration} goodwill impairment    
Impairment Of Intangible Asset Indefinite Lived Excluding Goodwill Statement Of Income Or Comprehensive Income Extensible Enumeration Not Disclosed Flag   impairment charge  
Foreign currency translations adjustments $ 1,169    
Amortization expense 23,280 $ 22,803 22,389
Amortization expense estimated for 2026 23,600    
Amortization expense estimated for 2027 23,600    
Amortization expense estimated for 2028 23,600    
Amortization expense estimated for 2029 23,500    
Amortization expense estimated for 2030 23,300    
Amortization expense estimated thereafter 186,545    
Consumer and Professional Products      
Goodwill [Line Items]      
Goodwill 1,664 138,140 136,611
Goodwill, impairment loss 136,612 136,612  
Impairment of indefinite-lived intangible assets $ 107,000 $ 109,200 $ 109,200