Income Taxes - Summary of Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Tax Disclosure [Abstract]
Income before income taxes	$ 193,676	$ 67,373	$ 492,079	$ 298,717
Provision (benefit) for income taxes	$ 52,348	$ (1,605)	$ 105,875	$ 48,907
Effective income tax rate	27.00%	(2.00%)	22.00%	16.00%

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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+ Details

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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+ Details