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	Sep. 30, 2025	Sep. 30, 2024
Derivative [Line Items]
Notional amount	$ 1,518,086	$ 1,058,478
Euro / U.S. Dollar
Derivative [Line Items]
Notional amount	1,202,830	781,398
British Pound / U.S. Dollar
Derivative [Line Items]
Notional amount	22,974	24,810
Israeli Shekel / U.S. Dollar
Derivative [Line Items]
Notional amount	20,094	12,535
Japanese Yen / U.S. Dollar
Derivative [Line Items]
Notional amount	131,284	42,340
Indian Rupee / U.S. Dollar
Derivative [Line Items]
Notional amount	53,465	0
Swiss Franc / U.S. Dollar
Derivative [Line Items]
Notional amount	8,960	74,939
Swedish Krona / U.S. Dollar
Derivative [Line Items]
Notional amount	21,568	48,596
Chinese Renminbi / U.S. Dollar
Derivative [Line Items]
Notional amount	7,134	32,124
New Taiwan Dollar / U.S. Dollar
Derivative [Line Items]
Notional amount	23,098	16,368
All other
Derivative [Line Items]
Notional amount	$ 26,679	$ 25,368