Quarterly report [Sections 13 or 15(d)]

Derivatives and Hedging Activities - Narrative (Details)

v3.26.1
Derivatives and Hedging Activities - Narrative (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Mar. 31, 2026
Sep. 30, 2025
Designated as Hedging Instrument    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Unrealized gain expected to be recognized over the next 12 months $ 392  
Interest Rate Swaps | Cash flow hedges | Designated as Hedging Instrument    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Unrealized loss on fair value of interest rate swaps, before tax 820 $ 2,338
Unrealized loss on fair value of interest rate swaps, after tax 621 1,752
LIBOR-Based Swap | Cash flow hedges | Designated as Hedging Instrument    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Unrecognized gain on LIBOR-based swaps 1,011 1,605
Unrecognized gain on LIBOR-based swaps, after tax 757 1,199
Cross-Currency Swaps    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Advance payments received from counterparties $ 40,186 $ 40,186