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Earnings Per Common Share (Tables) | 9 Months Ended
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Sep. 30, 2019
Earnings Per Share [Abstract] |
Computation of Earnings Per Common Share |
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
(in thousands, except per share data) |  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income to common shareholders |  | $ | 67,807 |  |  | $ | 83,878 |  |  | $ | 235,248 |  |  | $ | 227,530 |
Net income allocated to participating securities - basic and diluted |  |  | 1,141 |  |  |  | 1,544 |  |  |  | 3,980 |  |  |  | 4,238 |
Net income allocated to common shareholders - basic and diluted |  | $ | 66,666 |  |  | $ | 82,334 |  |  | $ | 231,268 |  |  | $ | 223,292 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average common shares - basic |  |  | 86,377 |  |  |  | 85,348 |  |  | $ | 85,934 |  |  | $ | 85,298 |
Dilutive potential common shares |  |  | 85 |  |  |  | 191 |  |  |  | 76 |  |  |  | 184 |
Weighted-average common shares - diluted |  |  | 86,462 |  |  |  | 85,539 |  |  | $ | 86,010 |  |  | $ | 85,482 |
Earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.77 |  |  | $ | 0.96 |  |  | $ | 2.69 |  |  | $ | 2.62 |
Diluted |  | $ | 0.77 |  |  | $ | 0.96 |  |  | $ | 2.69 |  |  | $ | 2.61 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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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