Derivative Financial Instruments - Schedule of Derivative Financial Instruments at Gross Fair Value (Details) - USD ($) $ in Thousands		Mar. 31, 2026	Sep. 30, 2025
Designated as Hedging Instrument | Forward Contracts
Derivative [Line Items]
Gross Amount of Recognized Assets	[1]	$ 0	$ 2,871
Gross Amount of Recognized Liabilities	[2]	2,149	0
Designated as Hedging Instrument | Option contracts
Derivative [Line Items]
Gross Amount of Recognized Assets	[1]	0	0
Not Designated as Hedging Instrument | Forward Contracts
Derivative [Line Items]
Fair Value of Derivatives Not Designated As Hedging Instruments	[1]	735	3,136
Fair Value of Derivatives Not Designated As Hedging Instruments	[2]	3,125	4,773
Not Designated as Hedging Instrument | Option contracts
Derivative [Line Items]
Fair Value of Derivatives Not Designated As Hedging Instruments	[1]	$ 6,882	$ 6,228

[1] As of March 31, 2026 and September 30, 2025, current derivative assets are recorded in Other current assets in the Consolidated Balance Sheets.

[2] As of March 31, 2026 and September 30, 2025, current derivative liabilities are recorded in Accrued expenses and other current liabilities in the Consolidated Balance Sheets.