Derivatives - Schedule of Designated in Qualifying Hedging Relationship (Details) - Designated as Hedging Instrument - Long-Term Debt - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024
2028 Notes
Open Forward Foreign Currency Contract [Line Items]
Carrying Value	$ 720,521	$ 460,642
Cumulative Hedging Adjustment	9,445	14,675
2029 Notes
Open Forward Foreign Currency Contract [Line Items]
Carrying Value	756,102	606,271
Cumulative Hedging Adjustment	$ 10,232	$ 12,213