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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

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