Derivative and Hedging Instruments - Balance Sheet Location (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Sep. 30, 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net asset (liability)	$ 2,015	$ (916)
Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative and hedging instruments	385	0
Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liabilities	0	(1,448)
Balance Sheet Location [Axis]: us-gaap:PrepaidExpenseAndOtherAssetsCurrent
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative and hedging instruments	$ 1,630	$ 532