Annual report pursuant to Section 13 and 15(d)

DERIVATIVES AND HEDGING ACTIVITIES - Narrative (Details)

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DERIVATIVES AND HEDGING ACTIVITIES - Narrative (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2023
USD ($)
Sep. 30, 2023
USD ($)
contract
Sep. 30, 2022
USD ($)
contract
Sep. 30, 2021
USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Economic hedge contracts, outstanding | contract   0 0  
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]   Other assets Other assets  
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]     Other income (deductions), net  
Designated as Hedging Instrument        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Unrealized gain expected to be recognized over the next 12 months   $ 3,850    
Not Designated as Hedging Instrument, Economic Hedge        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Gain from economic hedges     $ 4,677  
Interest Rate Swaps | Cash Flow Hedging | Designated as Hedging Instrument        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Cash proceeds from cross currency swap $ 10,474      
Derivative, notional amount $ 175,000 175,000 125,000  
Net unrealized gain on derivative   4,006 10,699  
Net unrealized gain on derivative, after tax   2,991 7,937  
Cross-Currency Swaps | Net Investment Hedging | Designated as Hedging Instrument        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Derivative, notional amount   81,392    
Net gains (losses) recognized in AOCI (effective portion)   (2,065) 2,782  
Net investment hedge, gain, after reclassification, tax expense (benefit)   701 (940)  
Currency translation adjustment gain, recognized as income       $ 5,370
Derivative asset, noncurrent   2,766 3,722  
Currency translation adjustment, tax       $ 1,743
Cross-Currency Swaps | Net Investment Hedging | Designated as Hedging Instrument | Interest Expense        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Currency translation adjustment gain, recognized as income   1,159 $ 1,645  
LIBOR-Based Swap | Cash Flow Hedging | Designated as Hedging Instrument        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Unrecognized gain on derivative   8,084    
Unrecognized gain on derivative, after tax   $ 6,041