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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2018
Earnings Per Share [Abstract] |
Computation Of Basic And Diluted Earnings Per Share | The following table summarizes the Company’s computation of basic and diluted earnings per share (EPS) for the three and six months ended June 30, 2018 and 2017 (amounts in thousands except per share information):
| Three Months Ended June 30, 2018 |  | Six Months Ended June 30, 2018
| Income (numerator) |  | Shares (denominator) |  | Per Share Amount |  | Income (numerator) |  | Shares (denominator) |  | Per Share Amount
Basic EPS: |  |  |  |  |  |  |  |  |  |  |
Net income | $ | 91,581 |  |  |  |  |  |  | $ | 121,119 |  |  |  |  |
Less: preferred dividend requirements | (6,036 | ) |  |  |  |  |  | (12,072 | ) |  |  |  |
Net income available to common shareholders | $ | 85,545 |  |  | 74,329 |  |  | $ | 1.15 |  |  | $ | 109,047 |  |  | 74,238 |  |  | $ | 1.47 |
Diluted EPS: |  |  |  |  |  |  |  |  |  |  |
Net income available to common shareholders | $ | 85,545 |  |  | 74,329 |  |  |  |  | $ | 109,047 |  |  | 74,238 |  |  |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |
Share options | — |  |  | 36 |  |  |  |  |  |  |  | 35 |  |  |
Net income available to common shareholders | $ | 85,545 |  |  | 74,365 |  |  | $ | 1.15 |  |  | $ | 109,047 |  |  | 74,273 |  |  | $ | 1.47 |
| Three Months Ended June 30, 2017 |  | Six Months Ended June 30, 2017
| Income (numerator) |  | Shares (denominator) |  | Per Share Amount |  | Income (numerator) |  | Shares (denominator) |  | Per Share Amount
Basic EPS: |  |  |  |  |  |  |  |  |  |  |
Net income | $ | 80,535 |  |  |  |  |  |  | $ | 134,451 |  |  |  |  |
Less: preferred dividend requirements | (5,952 | ) |  |  |  |  |  | (11,904 | ) |  |  |  |
Net income available to common shareholders | $ | 74,583 |  |  | 73,159 |  |  | $ | 1.02 |  |  | $ | 122,547 |  |  | 68,621 |  |  | $ | 1.79 |
Diluted EPS: |  |  |  |  |  |  |  |  |  |  |
Net income available to common shareholders | $ | 74,583 |  |  | 73,159 |  |  |  |  | $ | 122,547 |  |  | 68,621 |  |  |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |
Share options | — |  |  | 66 |  |  |  |  | — |  |  | 68 |  |  |
Net income available to common shareholders | $ | 74,583 |  |  | 73,225 |  |  | $ | 1.02 |  |  | $ | 122,547 |  |  | 68,689 |  |  | $ | 1.78 |

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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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