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 relates 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.