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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Schedule Of Computation Of Basic And Diluted Earnings Per Share | The following table sets forth the computation of basic and diluted earnings per share (in thousands, except per share data):
| For the Year Ended December 31,
| 2017 | 2016 | 2015
Net income available to common shareholders | $ | 54,310 |  | $ | 52,128 |  | $ | 54,097 |
Less: earnings allocated to participating securities | $ | (591 | ) | $ | (623 | ) | $ | (613 | )
Net earnings allocated to common shareholders | $ | 53,719 |  | $ | 51,505 |  | $ | 53,484 |
Distributed earnings allocated to common shares outstanding | $ | 27,497 |  | $ | 25,710 |  | $ | 25,212 |
Undistributed earnings allocated to common shares outstanding | 26,222 |  | 25,795 |  | 28,272 |
Net earnings allocated to common shareholders | $ | 53,719 |  | $ | 51,505 |  | $ | 53,484 |
Average shares outstanding, basic | 15,412 |  | 14,900 |  | 15,123 |
Effect of dilutive securities | 24 |  | 13 |  | 48 |
Average shares outstanding, diluted | 15,436 |  | 14,913 |  | 15,171 |
Basic earnings per share | $ | 3.49 |  | $ | 3.46 |  | $ | 3.54 |
Diluted earnings per share | $ | 3.48 |  | $ | 3.45 |  | $ | 3.53 |

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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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