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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2015
Earnings Per Share [Abstract] |
Reconciliation of basic and diluted earnings per share | The following is a reconciliation of basic and diluted earnings per share for the years presented in the consolidated statements of income:
| Years ended December 31, |
| 2015 |  |  | 2014 |  |  | 2013 |
(In thousands, except per share data) | Net income |  |  | Weighted average shares |  |  | Per share amount |  |  | Net income |  |  | Weighted average shares |  |  | Per share amount |  |  | Net income |  |  | Weighted average shares |  |  | Per share amount |
Basic earnings per share |  | $ | 76,425 |  |  | 43,836 |  |  | $ | 1.74 |  |  | $ | 75,074 |  |  |  | 43,877 |  |  | $ | 1.71 |  |  | $ | 61,747 |  |  |  | 41,930 |  |  | $ | 1.47 |
Effect of dilutive securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock based compensation |  |  |  |  |  | 553 |  |  |  |  |  |  |  |  |  |  |  | 518 |  |  |  |  |  |  |  |  |  |  |  | 420 |  |  |  |  |
Diluted earnings per share |  | $ | 76,425 |  |  | 44,389 |  |  | $ | 1.72 |  |  | $ | 75,074 |  |  |  | 44,395 |  |  | $ | 1.69 |  |  | $ | 61,747 |  |  |  | 42,350 |  |  | $ | 1.46 |

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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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