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Derivative Financial Instruments - Schedule of Notional Amounts of Outstanding Forward Contracts and Options (Details) - Not Designated as Hedging Instrument - Foreign Exchange Forward Contract and Options - USD ($) $ in Thousands | Mar. 31, 2026 | Sep. 30, 2025
--- | --- | ---
Derivative [Line Items] |  |  |
Notional amount |  | $ 1,059,158 | $ 1,518,086
Euro / U.S. Dollar |  |  |
Derivative [Line Items] |  |  |
Notional amount | [1] | 820,821 | 1,202,830
British Pound / U.S. Dollar |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | 16,776 | 22,974
Israeli Shekel / U.S. Dollar |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | 18,493 | 20,094
Indian Rupee / U.S. Dollar |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | 54,756 | 53,465
Japanese Yen / U.S. Dollar |  |  |
Derivative [Line Items] |  |  |
Notional amount | [2] | 98,390 | 131,284
Swedish Krona / U.S. Dollar |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | 12,392 | 21,568
New Taiwan Dollar / U.S. Dollar |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | 8,074 | 23,098
All other |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | $ 29,456 | $ 42,773
[1] | As of March 31, 2026, $677.5 million of the Euro to U.S. Dollar outstanding notional amount relates to forward contracts and $143.3 million relates to option contracts. As of September 30, 2025, $835.4 million of the Euro to U.S. Dollar outstanding notional amount relates to forward contracts and $367.4 million relates to option contracts.
[2] | As of March 31, 2026, $40.4 million of the Japanese Yen to U.S. Dollar outstanding notional amount relates to forward contracts and $58.0 million relate s to option contracts. As of September 30, 2025, $41.9 million of the Japanese Yen to U.S. Dollar outstanding notional amount relates to forward contracts and $89.4 million relates to option contracts.

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