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Balance Sheet Details - Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024
Balance Sheet Details [Abstract]
Machinery and Equipment, Gross	$ 228,514	$ 206,861
Capitalized Computer Software, Gross	70,808	71,690
Furniture and Fixtures, Gross	46,903	44,776
Leasehold Improvements, Gross	190,637	186,179
Property, Plant and Equipment, Gross	536,862	509,506
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(379,915)	(358,563)
Property, Plant and Equipment, Net	$ 156,947	$ 150,943

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Balance Sheet Details [Abstract]

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated amortization of capitalized costs for computer software, including but not limited to, acquired and internally developed computer software.

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Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.

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Amount before accumulated depreciation of additions or improvements to assets held under a lease arrangement.

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Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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