Derivative Financial Instruments - Schedule of Notional Amounts of Outstanding Forward Contracts (Details) - Forward Contracts - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024
Designated as Hedging Instrument | Net Investment Hedging
Derivative [Line Items]
Notional amount	$ 490,458	$ 473,633
Euro / U.S. Dollar
Derivative [Line Items]
Notional amount	835,400
Euro / U.S. Dollar | Designated as Hedging Instrument | Net Investment Hedging
Derivative [Line Items]
Notional amount	480,198	462,894
Japanese Yen / U.S. Dollar
Derivative [Line Items]
Notional amount	41,900
Japanese Yen / U.S. Dollar | Designated as Hedging Instrument | Net Investment Hedging
Derivative [Line Items]
Notional amount	$ 10,260	$ 10,739