Foreign Currency Forward Contracts (Details) - Selling, General and Administrative Expenses - Not Designated as Hedging Instrument - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Foreign currency balance sheet hedging
Foreign currency net gain (loss)	$ (1,135)	$ (1,673)	$ (574)
Foreign Currency Transaction
Foreign currency balance sheet hedging
Foreign currency net gain (loss)	(2,538)	4,393	(42)
Foreign Exchange Forward
Foreign currency balance sheet hedging
Foreign currency net gain (loss)	$ 1,403	$ (6,066)	$ (532)