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Earnings Per Share (Tables) | 12 Months Ended
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Sep. 30, 2022
Earnings Per Share [Abstract] |
Computation of Basic and Diluted Earnings Per Share | The following table sets forth the computation of basic and diluted earnings per share:
|  | Year Ended September 30, |
|  | 2022 |  |  | 2021 |  |  | 2020 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 549,501 |  |  | $ | 688,374 |  |  | $ | 497,840 |
Net income and dividends attributable to participating restricted stock |  |  | (7,880 | ) |  |  | (7,052 | ) |  |  | (3,663 | )
Numerator for basic earnings per common share |  | $ | 541,621 |  |  | $ | 681,322 |  |  | $ | 494,177 |
Undistributed income allocated to participating restricted stock |  |  | 5,159 |  |  |  | 5,199 |  |  |  | 2,417 |
Undistributed income reallocated to participating restricted stock |  |  | (5,124 | ) |  |  | (5,167 | ) |  |  | (2,406 | )
Numerator for diluted earnings per common share |  | $ | 541,656 |  |  | $ | 681,354 |  |  | $ | 494,188 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of shares outstanding — basic |  |  | 122,812 |  |  |  | 128,495 |  |  |  | 133,590 |
Weighted average number of participating restricted stock |  |  | (1,761 | ) |  |  | (1,316 | ) |  |  | (983 | )
Weighted average number of common shares — basic |  |  | 121,051 |  |  |  | 127,179 |  |  |  | 132,607 |
Effect of dilutive stock options and restricted stock units granted |  |  | 838 |  |  |  | 789 |  |  |  | 642 |
Weighted average number of common shares — diluted |  |  | 121,889 |  |  |  | 127,968 |  |  |  | 133,249 |
Basic earnings per common share |  | $ | 4.47 |  |  | $ | 5.36 |  |  | $ | 3.73 |
Diluted earnings per common share |  | $ | 4.44 |  |  | $ | 5.32 |  |  | $ | 3.71 |

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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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