Annual report pursuant to Section 13 and 15(d)

DERIVATIVES AND HEDGING ACTIVITIES - Interest Rate Swap Contracts Reflected in Consolidated Balance Sheets (Details)

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DERIVATIVES AND HEDGING ACTIVITIES - Interest Rate Swap Contracts Reflected in Consolidated Balance Sheets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Interest Rate Swaps | Cash Flow Hedging | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Total derivatives (1) $ (2,606) $ 4,006
Cross-Currency Swaps    
Derivatives, Fair Value [Line Items]    
Advance payments received from counterparties 58,432  
Cross-Currency Swaps | Net Investment Hedging | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Total derivatives (1) (66,967) (2,766)
Other current assets | Interest Rate Swaps | Cash Flow Hedging | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Assets derivatives 0 920
Other current assets | Cross-Currency Swaps | Net Investment Hedging | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Assets derivatives 0 0
Other assets | Interest Rate Swaps | Cash Flow Hedging | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Assets derivatives 0 3,086
Other assets | Cross-Currency Swaps | Net Investment Hedging | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Assets derivatives 0 0
Other liabilities | Interest Rate Swaps | Cash Flow Hedging | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Liability derivatives (1,743) 0
Other liabilities | Cross-Currency Swaps | Net Investment Hedging | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Liability derivatives (48,925) (2,766)
Other current liabilities | Interest Rate Swaps | Cash Flow Hedging | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Liability derivatives (863) 0
Other current liabilities | Cross-Currency Swaps | Net Investment Hedging | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Liability derivatives $ (18,042) $ 0