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Earnings Per Common Share (Tables) | 3 Months Ended
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Mar. 31, 2019
Earnings Per Share [Abstract] |
Computation of Earnings Per Common Share |
|  | Three Months Ended |
|  | March 31, |
(in thousands, except per share data) |  | 2019 |  |  | 2018 |
Numerator: |  |  |  |  |  |  |  |
Net income to common shareholders |  | $ | 79,164 |  |  | $ | 72,475 |
Net income allocated to participating securities - basic and diluted |  |  | 1,337 |  |  |  | 1,366 |
Net income allocated to common shareholders - basic and diluted |  | $ | 77,827 |  |  | $ | 71,109 |
Denominator: |  |  |  |  |  |  |  |
Weighted-average common shares - basic |  |  | 85,688 |  |  |  | 85,241 |
Dilutive potential common shares |  |  | 112 |  |  |  | 182 |
Weighted-average common shares - diluted |  |  | 85,800 |  |  |  | 85,423 |
Earnings per common share: |  |  |  |  |  |  |  |
Basic |  | $ | 0.91 |  |  | $ | 0.83 |
Diluted |  | $ | 0.91 |  |  | $ | 0.83 |

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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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