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Stockholders' Equity (Changes in Non-vested Stock Options) (Details) - Stock Options [Member] - $ / shares shares in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Number of Options, beginning balance | 2,106 | 2,078
Options granted, Number of options |  | 773
Options vested, Number of options |  | (742)
Options forfeited, Number of options | (19) | (22)
Number of Options, ending balance | 2,087 | 2,087
Weighted-Average Grant Date Fair Value Per Share, beginning balance | $ 25.81 | $ 24.69
Options granted, Weighted-Average Grant Date Fair Value Per Share |  | 28.22
Options vested, Weighted-Average Grant Date Fair Value Per Share |  | 25.19
Options forfeited, Weighted-Average Grant Date Fair Value Per Share | 24.97 | 25.01
Weighted-Average Grant Date Fair Value Per Share, ending balance | $ 25.82 | $ 25.82

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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. + References No definition available. + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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