Derivative and Hedging Instruments - Balance Sheet Location (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Sep. 30, 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net asset (liability)	$ 729	$ (916)
Prepaid expenses and other current assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative and hedging instruments	597	532
Other long-term assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative and hedging instruments	132	0
Other long-term liabilities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liabilities	$ 0	$ (1,448)