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Earnings Per Common Share (Tables) | 9 Months Ended
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Sep. 30, 2017
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 nine months ended September 30, 2017 and 2016.
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
(In thousands, except share and per common share data) |  | 2017 |  | 2016 |  | 2017 |  | 2016
Numerator: |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 22,112 |  |  | $ | 27,449 |  |  | $ | 61,411 |  |  | $ | 66,133 |
Denominator: |  |  |  |  |  |  |  |  |  |
Weighted-average common shares outstanding |  | 15,287,974 |  |  | 15,330,791 |  |  | 15,299,039 |  |  | 15,330,802 |
Effect of dilutive performance-based restricted stock units |  | 63,616 |  |  | 68,916 |  |  | 95,160 |  |  | 71,023 |
Weighted-average common shares outstanding adjusted for the effect of dilutive performance-based restricted stock units |  | 15,351,590 |  |  | 15,399,707 |  |  | 15,394,199 |  |  | 15,401,825 |
Earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings per common share |  | $ | 1.45 |  |  | $ | 1.79 |  |  | $ | 4.01 |  |  | $ | 4.31 |
Diluted earnings per common share |  | $ | 1.44 |  |  | $ | 1.78 |  |  | $ | 3.99 |  |  | $ | 4.29 |

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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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