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, 2022	Sep. 30, 2021
Derivative [Line Items]
Notional amount	$ 673,284	$ 563,921
Canadian / U.S. Dollar
Derivative [Line Items]
Notional amount	5,605	4,894
Euro / U.S. Dollar
Derivative [Line Items]
Notional amount	500,632	387,466
British Pound / U.S. Dollar
Derivative [Line Items]
Notional amount	10,537	23,141
Israeli Shekel / U.S. Dollar
Derivative [Line Items]
Notional amount	9,148	10,475
Japanese Yen / U.S. Dollar
Derivative [Line Items]
Notional amount	28,826	46,450
Swiss Franc / U.S. Dollar
Derivative [Line Items]
Notional amount	17,299	18,039
Swedish Krona / U.S. Dollar
Derivative [Line Items]
Notional amount	31,352	34,196
Chinese Renminbi / U.S. Dollar
Derivative [Line Items]
Notional amount	37,735	23,297
New Taiwan Dollar / U.S. Dollar
Derivative [Line Items]
Notional amount	5,410	3,369
Romanian Leu/ U.S. Dollar
Derivative [Line Items]
Notional amount	4,651	778
Russian Ruble/ U.S. Dollar
Derivative [Line Items]
Notional amount	0	2,614
Danish krone/ U.S. Dollar
Derivative [Line Items]
Notional amount	8,891	2,380
Australian Dollar/ U.S. Dollar
Derivative [Line Items]
Notional amount	5,052	2,086
All other
Derivative [Line Items]
Notional amount	$ 8,146	$ 4,736