Derivatives - Schedule of Realized and Unrealized Gain (Loss) on Forward Currency Contract (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Open Forward Foreign Currency Contract [Line Items]
Gain (loss) on sale of derivatives	$ 4,168	$ 3,646	$ 2,711
Foreign exchange
Open Forward Foreign Currency Contract [Line Items]
Gain (loss) on sale of derivatives	4,168	3,646	2,711
Forward currency contracts	$ (8,542)	$ (19,011)	$ (17,392)