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Earnings per Share (Tables) | 12 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Reconciliation of Numerators and Denominators of Basic and Diluted Earnings Per Share | The following table presents reconciliations for the numerators and denominators of basic and diluted earnings per share (“EPS”) during fiscal 2018, 2017 and 2016:
| Year Ended September 30,
| 2018 |  | 2017 |  | 2016
| (In thousands, except per share data)
Numerator for basic and diluted earnings per share — net income | $ | 142,415 |  |  | $ | 128,256 |  |  | $ | 109,448 |
Denominator — share: |  |  |  |  |
Basic weighted-average shares | 29,711 |  |  | 30,862 |  |  | 31,129 |
Effect of dilutive securities | 1,469 |  |  | 1,383 |  |  | 1,179 |
Diluted weighted-average shares | 31,180 |  |  | 32,245 |  |  | 32,308 |
Earnings per share: |  |  |  |  |
Basic | $ | 4.79 |  |  | $ | 4.16 |  |  | $ | 3.52 |
Diluted | $ | 4.57 |  |  | $ | 3.98 |  |  | $ | 3.39 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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