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Earnings Per Share (Tables) | 6 Months Ended
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Mar. 31, 2025
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | Basic and diluted earnings per share for the three and six months ended March 31, 2025 and 2024 are calculated as follows:
| Three Months Ended March 31 |  | Six Months Ended March 31
| 2025 |  | 2024 |  | 2025 |  | 2024
| (In thousands, except per share amounts)
Basic Earnings Per Share |  |  |  |  |  |  |
Net income | $ | 485,576 |  |  | $ | 432,023 |  |  | $ | 837,434 |  |  | $ | 743,315 |
Less: Income allocated to participating securities | 245 |  |  | 255 |  |  | 436 |  |  | 442 |
Income available to common shareholders | $ | 485,331 |  |  | $ | 431,768 |  |  | $ | 836,998 |  |  | $ | 742,873 |
Basic weighted average shares outstanding | 159,177 |  |  | 151,271 |  |  | 157,739 |  |  | 150,534 |
Net income per share — Basic | $ | 3.05 |  |  | $ | 2.85 |  |  | $ | 5.31 |  |  | $ | 4.93 |
Diluted Earnings Per Share |  |  |  |  |  |  |
Income available to common shareholders | $ | 485,331 |  |  | $ | 431,768 |  |  | $ | 836,998 |  |  | $ | 742,873 |
Effect of dilutive shares | — |  |  | — |  |  | — |  |  | — |
Income available to common shareholders | $ | 485,331 |  |  | $ | 431,768 |  |  | $ | 836,998 |  |  | $ | 742,873 |
Basic weighted average shares outstanding | 159,177 |  |  | 151,271 |  |  | 157,739 |  |  | 150,534 |
Dilutive shares | 1,249 |  |  | 26 |  |  | 1,386 |  |  | 13 |
Diluted weighted average shares outstanding | 160,426 |  |  | 151,297 |  |  | 159,125 |  |  | 150,547 |
Net income per share — Diluted | $ | 3.03 |  |  | $ | 2.85 |  |  | $ | 5.26 |  |  | $ | 4.93 |

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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 -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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