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Earnings Per Common Share (Tables) | 6 Months Ended
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Jun. 30, 2015
Earnings Per Share [Abstract] |
Summary Of Computation Of Basic And Diluted Earnings Per Common Share | The following table sets forth the computation of basic and diluted earnings per common share for the three and six months ended June 30, 2015 and 2014.
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
(In thousands, except share and per share data) |  | 2015 |  | 2014 |  | 2015 |  | 2014
Numerator: |  |  |  |  |  |  |  |  |  |
Net income available to common shareholders |  | $ | 21,039 |  |  | $ | 21,810 |  |  | $ | 40,083 |  |  | $ | 41,387 |
Denominator: |  |  |  |  |  |  |  |  |  |
Denominator for basic earnings per share (weighted average common shares outstanding) |  | 15,370,882 |  |  | 15,392,435 |  |  | 15,375,026 |  |  | 15,396,770 |
Effect of dilutive performance-based restricted stock units |  | 36,999 |  |  | 19,732 |  |  | 36,894 |  |  | 16,798 |
Denominator for diluted earnings per share (weighted average common shares outstanding adjusted for the effect of dilutive performance-based restricted stock units) |  | 15,407,881 |  |  | 15,412,167 |  |  | 15,411,920 |  |  | 15,413,568 |
Earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings per common share |  | $ | 1.37 |  |  | $ | 1.42 |  |  | $ | 2.61 |  |  | $ | 2.69 |
Diluted earnings per common share |  | $ | 1.37 |  |  | $ | 1.42 |  |  | $ | 2.60 |  |  | $ | 2.69 |

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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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