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Earnings Per Share | 12 Months Ended
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Sep. 30, 2020
Earnings Per Share [Abstract] |
Earnings Per Share | Note 4. Earnings per share Basic earnings per share is computed by dividing net earnings available to common stockholders by the weighted-average number of shares of common stock outstanding for the period. Diluted earnings per share reflects the weighted-average number of shares outstanding after consideration of the dilutive effect of stock options and restricted stock. The following is a reconciliation of net earnings to basic earnings per share and diluted earnings per share:
|  | Year Ended September 30, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net earnings |  | $ | 240,395 |  |  | $ | 259,602 |  |  | $ | 180,378 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Basic shares outstanding |  |  | 62,267 |  |  |  | 61,950 |  |  |  | 61,493 |
Dilutive effect of stock options and restricted stock units |  |  | 1,942 |  |  |  | 2,548 |  |  |  | 2,383 |
Diluted shares outstanding |  |  | 64,209 |  |  |  | 64,498 |  |  |  | 63,876 |
Income per common share: |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings per share |  | $ | 3.86 |  |  | $ | 4.19 |  |  | $ | 2.93 |
Diluted earnings per share |  | $ | 3.74 |  |  | $ | 4.02 |  |  | $ | 2.82 |
The following stock option grants were outstanding during the fiscal years ended September 30, 2020, 2019 and 2018, but were excluded from the computation of diluted earnings per share because their inclusion would have been anti-dilutive.
|  | Year Ended September 30, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Options |  |  | 660 |  |  |  | 25 |  |  |  | 760 |
Weighted-average option price |  | $ | 104.45 |  |  | $ | 96.54 |  |  | $ | 78.72 |
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, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Weighted-average treasury stock shares held for deferred compensation obligations |  |  | 211 |  |  |  | 208 |  |  |  | 198 |

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