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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.

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