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, 2025	Sep. 30, 2024
Derivative [Line Items]
Notional amount	$ 873,034	$ 1,058,478
Euro / U.S. Dollar
Derivative [Line Items]
Notional amount	764,722	781,398
British Pound / U.S. Dollar
Derivative [Line Items]
Notional amount	16,391	24,810
Israeli Shekel / U.S. Dollar
Derivative [Line Items]
Notional amount	13,615	12,535
Japanese Yen / U.S. Dollar
Derivative [Line Items]
Notional amount	27,008	42,340
Swiss Franc / U.S. Dollar
Derivative [Line Items]
Notional amount	5,319	74,939
Swedish Krona / U.S. Dollar
Derivative [Line Items]
Notional amount	16,036	48,596
Chinese Renminbi / U.S. Dollar
Derivative [Line Items]
Notional amount	3,891	32,124
New Taiwan Dollar / U.S. Dollar
Derivative [Line Items]
Notional amount	6,501	16,368
All other
Derivative [Line Items]
Notional amount	$ 19,551	$ 25,368