v3.24.3
Derivative Instruments - (Details)
 12 Months Ended
Sep. 30, 2024
USD ($)
Instrument
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Apr. 30, 2023
USD ($)
Jul. 31, 2017
USD ($)
Derivative
Derivative Instruments          
Number of derivative instruments held | Instrument 0        
Interest expense $ 76,408,000 $ 72,979,000 $ 93,543,000    
Foreign Currency Forwards          
Derivative Instruments          
Notional Amount 116,746,000        
Foreign Currency Forwards | Selling, General and Administrative Expenses          
Derivative Instruments          
Foreign currency forwards designated as cash flow hedges to be reclassified in to cost of goods sold 1,100,000 2,200,000 9,600,000    
Interest rate caps | Sally Holdings, LLC          
Derivative Instruments          
Notional Amount       $ 200,000,000  
Interest income 3,300,000 1,300,000      
Fixed interest rate       3.705%  
Interest rate caps designated as cash flow hedges to be reclassified in to interest expense over next 12 months 100,000        
Interest rate caps | Variable-rate tranche | Sally Holdings, LLC          
Derivative Instruments          
Notional Amount         $ 550,000,000
Number of interest rate caps | Derivative         2
Interest income   2,800,000      
Interest expense     1,700,000    
Reclassification out of Accumulated Other Comprehensive Income | Foreign Currency Forwards          
Derivative Instruments          
Foreign currency forwards designated as cash flow hedges to be reclassified net losses into cost of goods sold over next 12 months (100,000)        
Foreign currency forwards designated as cash flow hedges to be reclassified in to cost of goods sold $ (2,900,000) $ (1,900,000) $ 100,000