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Earnings Per Share (Tables) | 12 Months Ended
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Sep. 30, 2021
Earnings Per Share [Abstract] |
Reconciliation of Net Earnings to Net Earnings Per Share Basic and Diluted | The following is a reconciliation of net earnings to basic earnings per share and diluted earnings per share:
|  | Year Ended September 30, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net earnings |  | $ | 208,649 |  |  | $ | 240,395 |  |  | $ | 259,602 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Basic shares outstanding |  |  | 63,287 |  |  |  | 62,267 |  |  |  | 61,950 |
Dilutive effect of stock options and restricted stock units |  |  | 2,268 |  |  |  | 1,942 |  |  |  | 2,548 |
Diluted shares outstanding |  |  | 65,555 |  |  |  | 64,209 |  |  |  | 64,498 |
Income per common share: |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings per share |  | $ | 3.30 |  |  | $ | 3.86 |  |  | $ | 4.19 |
Diluted earnings per share |  | $ | 3.18 |  |  | $ | 3.74 |  |  | $ | 4.02 |
Anti-dilutive Stock Options Excluded from Computation of Earnings Per Share | The following stock option grants were outstanding during the fiscal years ended September 30, 2021, 2020 and 2019, but were excluded from the computation of diluted earnings per share because their inclusion would have been anti-dilutive.
|  | Year Ended September 30, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Options |  |  | 41 |  |  |  | 660 |  |  |  | 25 |
Weighted-average option price |  | $ | 116.38 |  |  | $ | 104.45 |  |  | $ | 96.54 |
Schedule of Treasury Stock Shares Held for Deferred Compensation Included in Basic and Diluted Shares Outstanding | The weighted-average shares of common stock outstanding for basic and diluted earnings per share included the weighted-average treasury stock shares held for deferred compensation obligations of the following:
|  | Year Ended September 30, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Weighted-average treasury stock shares held for deferred compensation obligations |  |  | 186 |  |  |  | 211 |  |  |  | 208 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of the weighted average number of shares of treasury stock held for deferred compensation determined by relating the portion of time within a reporting period that treasury stock shares held for deferred compensation have been outstanding to the total time in that period. The shares held for deferred compensation are included in basic and diluted shares in the calculation of earnings per share. Treasury stock shares held for deferred compensation shares are shares of company stock, issued to a trust (for example, a 'rabbi trust') set up specifically to accumulate stock or other investments for the purpose of deferring taxable income to participating employees until the stock or other investments are distributed to the participating employees. + References No definition available. + Details
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