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Earnings Per Share (Tables) | 6 Months Ended
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Mar. 31, 2023
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, 2023 and 2022 are calculated as follows:
| Three Months Ended March 31 |  | Six Months Ended March 31
| 2023 |  | 2022 |  | 2023 |  | 2022
| (In thousands, except per share amounts)
Basic Earnings Per Share |  |  |  |  |  |  |
Net income | $ | 357,671 |  |  | $ | 324,999 |  |  | $ | 629,531 |  |  | $ | 574,208 |
Less: Income allocated to participating securities | 212 |  |  | 202 |  |  | 381 |  |  | 379 |
Income available to common shareholders | $ | 357,459 |  |  | $ | 324,797 |  |  | $ | 629,150 |  |  | $ | 573,829 |
Basic weighted average shares outstanding | 143,941 |  |  | 136,834 |  |  | 142,881 |  |  | 135,259 |
Net income per share — Basic | $ | 2.48 |  |  | $ | 2.37 |  |  | $ | 4.40 |  |  | $ | 4.24 |
Diluted Earnings Per Share |  |  |  |  |  |  |
Income available to common shareholders | $ | 357,459 |  |  | $ | 324,797 |  |  | $ | 629,150 |  |  | $ | 573,829 |
Effect of dilutive shares | — |  |  | — |  |  | — |  |  | — |
Income available to common shareholders | $ | 357,459 |  |  | $ | 324,797 |  |  | $ | 629,150 |  |  | $ | 573,829 |
Basic weighted average shares outstanding | 143,941 |  |  | 136,834 |  |  | 142,881 |  |  | 135,259 |
Dilutive shares | 46 |  |  | 416 |  |  | 82 |  |  | 211 |
Diluted weighted average shares outstanding | 143,987 |  |  | 137,250 |  |  | 142,963 |  |  | 135,470 |
Net income per share — Diluted | $ | 2.48 |  |  | $ | 2.37 |  |  | $ | 4.40 |  |  | $ | 4.24 |

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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 https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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