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Earnings Per Share | 6 Months Ended
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Mar. 31, 2026
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:
|  | Three Months Ended March 31, |  |  | Six Months Ended March 31, |
|  | 2026 |  |  | 2025 |  |  | 2026 |  |  | 2025 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net earnings |  | $ | 134,013 |  |  | $ | 108,949 |  |  | $ | 267,732 |  |  | $ | 196,040 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Basic shares outstanding |  |  | 59,611 |  |  |  | 59,432 |  |  |  | 59,725 |  |  |  | 59,323 |
Dilutive effect of stock options; restricted and performance stock units |  |  | 1,665 |  |  |  | 1,912 |  |  |  | 1,737 |  |  |  | 1,935 |
Diluted shares outstanding |  |  | 61,276 |  |  |  | 61,344 |  |  |  | 61,462 |  |  |  | 61,258 |
Income per common share: |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings per share |  | $ | 2.25 |  |  | $ | 1.83 |  |  | $ | 4.48 |  |  | $ | 3.30 |
Diluted earnings per share |  | $ | 2.19 |  |  | $ | 1.78 |  |  | $ | 4.36 |  |  | $ | 3.20 |
The following stock option grants and restricted stock awards were outstanding but were excluded from the computation of diluted earnings per share because their inclusion would have been anti-dilutive:
|  | Three Months Ended March 31, |  |  | Six Months Ended March 31, |
|  | 2026 |  |  | 2025 |  |  | 2026 |  |  | 2025 |
Restricted stock and option awards |  |  | 9 |  |  |  | 21 |  |  |  | 5 |  |  |  | 10 |
Weighted-average price |  | $ | 391.53 |  |  | $ | 193.09 |  |  | $ | 391.53 |  |  | $ | 193.09 |
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:
|  | Three Months Ended March 31, |  |  | Six Months Ended March 31, |
|  | 2026 |  |  | 2025 |  |  | 2026 |  |  | 2025 |
Weighted-average treasury stock shares held for deferred compensation obligations |  |  | 28 |  |  |  | 30 |  |  |  | 29 |  |  |  | 35 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/260/tableOfContent Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-3 + Details
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