Derivative Financial Instruments - Summary of Outstanding Forward Foreign Currency Contracts by Currency (Details) € in Thousands, £ in Thousands, $ in Thousands, $ in Thousands	Jun. 30, 2025 EUR (€)	Jun. 30, 2025 USD ($)	Jun. 30, 2025 GBP (£)	Jun. 30, 2025 SGD ($)	Sep. 30, 2024 EUR (€)	Sep. 30, 2024 USD ($)	Sep. 30, 2024 GBP (£)	Sep. 30, 2024 SGD ($)
Foreign Exchange Contracts To Sell European Euro for US Dollar
Derivative [Line Items]
Fair Value		$ 0				$ 0
Foreign Exchange Contracts To Sell European Euro for US Dollar \| Foreign currency forward contracts \| Short \| Not Designated as Hedging Instrument
Derivative [Line Items]
Contract Amount	€ 6,500	7,655			€ 13,000	14,531
Foreign Exchange Contracts To Purchase British Pounds With US Dollars
Derivative [Line Items]
Fair Value		0				0
Foreign Exchange Contracts To Purchase British Pounds With US Dollars \| Foreign currency forward contracts \| Short \| Not Designated as Hedging Instrument
Derivative [Line Items]
Contract Amount		13,200	£ 9,613			16,400	£ 12,237
Foreign Exchange Contracts To Purchase Singapore Dollars With US Dollars
Derivative [Line Items]
Fair Value		0				0
Foreign Exchange Contracts To Purchase Singapore Dollars With US Dollars \| Foreign currency forward contracts \| Short \| Not Designated as Hedging Instrument
Derivative [Line Items]
Contract Amount		$ 4,500		$ 5,708		$ 5,800		$ 7,404