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Earnings per Share (Tables) | 6 Months Ended
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Mar. 31, 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”) for the quarters and six-month periods ended March 31, 2018 and 2017:
| Quarter Ended March 31, |  | Six Months Ended March 31,
| 2018 |  | 2017 |  | 2018 |  | 2017
| (In thousands, except per share data)
Numerator for diluted and basic earnings per share: |  |  |  |  |  |  |
Net Income | $ | 32,275 |  |  | $ | 25,084 |  |  | $ | 59,574 |  |  | $ | 62,985 |
Denominator - share: |  |  |  |  |  |  |
Basic weighted-average shares | 29,985 |  |  | 31,017 |  |  | 30,032 |  |  | 31,003 |
Effect of dilutive securities | 1,315 |  |  | 1,243 |  |  | 1,399 |  |  | 1,395 |
Diluted weighted-average shares | 31,300 |  |  | 32,260 |  |  | 31,431 |  |  | 32,398 |
Earnings per share: |  |  |  |  |  |  |
Basic | $ | 1.08 |  |  | $ | 0.81 |  |  | $ | 1.98 |  |  | $ | 2.03 |
Diluted | $ | 1.03 |  |  | $ | 0.78 |  |  | $ | 1.90 |  |  | $ | 1.94 |

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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/2003/role/presentationRef -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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