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Composition Of Certain Financial Statement Captions (Schedule Of Other Non-Current Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Sep. 30, 2022
Composition Of Certain Financial Statement Captions [Abstract]
Supplemental retirement plan obligations	$ 4,088	$ 4,127
Non-current tax liabilities	91,333	83,758
Other liabilities	28,582	12,237
Total other non-current liabilities	$ 124,003	$ 100,122

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Composition Of Certain Financial Statement Captions [Abstract]

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Non-Current Tax Liabilities

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- Definition

Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.24)
-Publisher FASB
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Amount of liability, classified as noncurrent, for retirement benefits, classified as other.

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-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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-Publisher FASB
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Obligations not otherwise itemized or categorized in the footnotes to the financial statements that are expected to be paid after one year (or the normal operating cycle, if longer), from the balance sheet date.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(15))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

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