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Stockholders' Equity (Changes in Non-vested Stock Options) (Details) - Stock Options [Member] - $ / shares shares in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Options, beginning balance	2,063
Options granted, Number of options	514
Options vested, Number of options	(721)
Options forfeited, Number of options	(44)
Number of Options, ending balance	1,812	2,063
Weighted-Average Grant Date Fair Value Per Share, beginning balance	$ 25.77
Options granted, Weighted-Average Grant Date Fair Value Per Share	41.78	$ 28.22	$ 25.41
Options vested, Weighted-Average Grant Date Fair Value Per Share	26.25
Options forfeited, Weighted-Average Grant Date Fair Value Per Share	29.53
Weighted-Average Grant Date Fair Value Per Share, ending balance	$ 30.03	$ 25.77

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- Definition

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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- Definition

Gross number of share options (or share units) granted during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(01)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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Number of non-vested options outstanding.

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