Balance Sheet Details - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 106,991	$ 112,702	$ 115,609
Amortization of Intangible Assets	24,400	29,100	36,400
Fair Value, Nonrecurring
Property, Plant and Equipment [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)			6,200
Property, Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 49,300	$ 53,300	$ 56,000

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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