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Earnings Per Share Reconciliation (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Schedule of Earnings Per Common Share Reconciliation | The table below shows earnings per common share and diluted earnings per common share, and reconciles the numerator and denominator of both earnings per common share calculations.
|  | For the Year Ended December 31, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
|  | (In thousands, except per share amounts) |
Earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |
Net earnings |  | $ | 104,411 |  |  | $ | 101,429 |  |  | $ | 99,145 |
Less: Net earnings allocated to restricted stock |  |  | 382 |  |  |  | 421 |  |  |  | 515 |
Net earnings allocated to common shareholders |  | $ | 104,029 |  |  | $ | 101,008 |  |  | $ | 98,630 |
Weighted average shares outstanding |  |  | 109,409 |  |  |  | 107,282 |  |  |  | 105,715 |
Basic earnings per common share |  | $ | 0.95 |  |  | $ | 0.94 |  |  | $ | 0.93 |
Diluted earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |
Net income allocated to common shareholders |  | $ | 104,029 |  |  | $ | 101,008 |  |  | $ | 98,630 |
Weighted average shares outstanding |  |  | 109,409 |  |  |  | 107,282 |  |  |  | 105,715 |
Incremental shares from assumed exercise of outstanding options |  |  | 398 |  |  |  | 405 |  |  |  | 477 |
Diluted weighted average shares outstanding |  |  | 109,807 |  |  |  | 107,687 |  |  |  | 106,192 |
Diluted earnings per common share |  | $ | 0.95 |  |  | $ | 0.94 |  |  | $ | 0.93 |

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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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