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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Apr. 30, 2025	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Tax [Line Items]
Income tax (expense) benefit		$ (29)	$ 395	$ 1,692	$ 1,380
Federal income tax refund amount	$ 33,785

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Income tax line items.

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

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Amount of cash received from federal tax jurisdiction for refund of tax on income. Includes, but is not limited to, national tax received for non-U.S. jurisdiction.

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