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	Dec. 31, 2021	Sep. 30, 2021
Derivative [Line Items]
Notional amount	$ 715,281	$ 563,921
Canadian / U.S. Dollar
Derivative [Line Items]
Notional amount	5,256	4,894
Euro / U.S. Dollar
Derivative [Line Items]
Notional amount	586,301	387,466
British Pound / U.S. Dollar
Derivative [Line Items]
Notional amount	5,300	23,141
Israeli Shekel / U.S. Dollar
Derivative [Line Items]
Notional amount	13,859	10,475
Japanese Yen / U.S. Dollar
Derivative [Line Items]
Notional amount	43,066	46,450
Swiss Franc / U.S. Dollar
Derivative [Line Items]
Notional amount	7,621	18,039
Swedish Krona / U.S. Dollar
Derivative [Line Items]
Notional amount	16,683	34,196
Singapore Dollar / U.S. Dollar
Derivative [Line Items]
Notional amount	3,806	3,498
Chinese Renminbi / U.S. Dollar
Derivative [Line Items]
Notional amount	19,496	23,297
New Taiwan Dollar / U.S. Dollar
Derivative [Line Items]
Notional amount	2,669	3,369
Romanian Leu/ U.S. Dollar
Derivative [Line Items]
Notional amount	3,971	778
Russian Ruble/ U.S. Dollar
Derivative [Line Items]
Notional amount	0	2,614
All other
Derivative [Line Items]
Notional amount	$ 7,253	$ 5,704