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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2018
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 for the periods indicated:
(In thousands, except per share amounts) | Three Months Ended March 31,
2018 |  | 2017
Numerator: |  |  |
Net income | $ | 26,136 |  |  | $ | 27,032 |
Denominator: |  |  |
Weighted-average shares outstanding - basic | 18,288 |  |  | 18,056 |
Effect of dilutive shares | 322 |  |  | 317 |
Weighted-average shares outstanding - diluted | 18,610 |  |  | 18,373 |
Basic earnings per share | $ | 1.43 |  |  | $ | 1.50 |
Diluted earnings per share | $ | 1.40 |  |  | $ | 1.47 |

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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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