Impairment of Long-lived Assets - Impairment of Long-Lived Assets Held and Used (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Restructuring and Related Activities [Abstract]
Property and equipment		$ 9,066	$ 6,785
Finite-lived intangible assets	$ 4,475	35,864	0
Total	$ 0	$ 44,930	$ 6,785

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
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Period Type:	duration