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Interest and Other Expense, Net - Interest and Other Expense, Net (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Other Income and Expenses [Abstract] |  |  |  |
Interest income |  | $ (21,248) | $ (7,821) | $ (4,822)
Interest expense | [1] | 23,093 | 16,911 | 21,275
Foreign exchange loss | [2] | 12,057 | 16,720 | 1,110
Other, net |  | 3,727 | 581 | (6,766)
Total |  | $ 17,629 | $ 26,391 | $ 10,797
[1] | The Interest expense includes certain fees and for further details, please see Note 13 to the consolidated financial statements.
[2] | The Foreign exchange loss increase in fiscal years 2023 and 2022 is primarily attributable to volatility of certain currencies’ exchange rates for which hedging the exposure through derivatives financial instruments was not cost effective as well as to the cost of executing our hedging policy through derivatives financial instruments.

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