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Earnings Per Share | 12 Months Ended
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Sep. 30, 2025
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, restricted stock units, and performance stock units. The following is a reconciliation of net earnings to basic earnings per share and diluted earnings per share:
|  | Year Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
Numerator: |  |  |  |  |  |  |  |  |
Net earnings |  | $ | 442,111 |  |  | $ | 372,971 |  |  | $ | 232,368 |
Denominator: |  |  |  |  |  |  |  |  |
Basic shares outstanding |  |  | 59,563 |  |  |  | 60,076 |  |  |  | 59,908 |
Dilutive effect of stock options; restricted and performance stock units |  |  | 1,901 |  |  |  | 2,008 |  |  |  | 1,574 |
Diluted shares outstanding |  |  | 61,464 |  |  |  | 62,084 |  |  |  | 61,482 |
Income per common share: |  |  |  |  |  |  |  |  |
Basic earnings per share |  | $ | 7.42 |  |  | $ | 6.21 |  |  | $ | 3.88 |
Diluted earnings per share |  | $ | 7.19 |  |  | $ | 6.01 |  |  | $ | 3.78 |
The following stock option grants were outstanding but were excluded from the computation of diluted earnings per share because their inclusion would have been anti-dilutive:
|  | Year Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
Options |  |  | 25 |  |  |  | 63 |  |  |  | 561 |
Weighted-average option price |  | $ | 186.19 |  |  | $ | 135.26 |  |  | $ | 114.88 |
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, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
Weighted-average treasury stock shares held for deferred compensation obligations |  |  | 33 |  |  |  | 51 |  |  |  | 88 |

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