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Equity-based Compensation (Tables)

12 Months Ended

Sep. 30, 2025

Share-Based Payment Arrangement [Abstract]

Summary of Option Activity

The following tables summarize information about stock options to purchase the Company’s ordinary shares, restricted stock and restricted stock units, as well as changes during the fiscal year ended September 30, 2025:

Stock Options:

		Number of Stock Options				Weighted Average Exercise Price
Outstanding as of October 1, 2024			1,159			$	63.92
Granted			82				92.00
Exercised			(340	)			62.65
Forfeited			—				—
Outstanding as of September 30, 2025			901			$	66.95
Exercisable as of September 30, 2025			818			$	64.45

Summary of Restricted Stock and Restricted Stock Units Activity

Restricted Stock:

		Number of Restricted Stock				Weighted Average Grant Date Fair Value
Outstanding as of October 1, 2024			2,175			$	79.61
Granted			1,027				82.33
Vested			(932	)			78.74
Forfeited			(211	)			62.84
Outstanding as of September 30, 2025			2,059			$	83.08

Restricted Stock Units:

		Number of Restricted Stock Units				Weighted Average Grant Date Fair Value
Outstanding as of October 1, 2024			619			$	83.21
Granted			293				83.07
Vested			(231	)			81.08
Forfeited			(42	)			84.41
Outstanding as of September 30, 2025			639			$	83.84

Employee Equity-Based Compensation Pre-Tax Expense

Equity-based compensation pre-tax expense, including grants of employee stock options, restricted stock, restricted stock units and ESPP for the years ended September 30, 2025, 2024 and 2023 was as follows:

		Year Ended September 30,
		2025				2024				2023
Cost of revenue		$	51,320			$	53,409			$	42,969
Research and development			9,603				8,644				7,509
Selling, general and administrative			43,941				42,487				39,220
Total		$	104,864			$	104,540			$	89,698

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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