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Earnings Per Common Share (Tables) | 3 Months Ended
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Mar. 31, 2019
Earnings Per Common Share [Abstract] |
Schedule Of Net Income (Loss) Per Common Share |
|  |  | Three Months Ended |
|  |  | March 31, |
(Dollars in thousands, except per share amounts) |  | 2019 |  |  | 2018 |
Net income (loss) per share: |  |  |  |  |  |
Numerator |  |  |  |  |  |
Net income (loss) |  | $ | 348,900 |  |  | $ | 210,318 |
Less: dividends declared-common shares and nonvested common shares |  |  | (57,137 | ) |  |  | (53,240 | )
Undistributed earnings |  |  | 291,763 |  |  |  | 157,078 |
Percentage allocated to common shareholders (1) |  |  | 99.0 | % |  |  | 98.9 | %
|  |  |  | 288,706 |  |  |  | 155,410 |
Add: dividends declared-common shareholders |  |  | 56,531 |  |  |  | 52,697 |
Numerator for basic and diluted earnings per common share |  | $ | 345,237 |  |  | $ | 208,107 |
Denominator |  |  |  |  |  |  |  |
Denominator for basic earnings per weighted-average common shares |  |  | 40,304 |  |  |  | 40,469 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Options |  |  | 141 |  |  |  | 220 |
Denominator for diluted earnings per adjusted weighted-average common shares |  |  | 40,445 |  |  |  | 40,689 |
Per common share net income (loss) |  |  |  |  |  |  |  |
Basic |  | $ | 8.57 |  |  | $ | 5.14 |
Diluted |  | $ | 8.54 |  |  | $ | 5.11 |
(1) | Basic weighted-average common shares outstanding |  |  | 40,304 |  |  |  | 40,469 |
| Basic weighted-average common shares outstanding and nonvested common shares expected to vest |  |  | 40,731 |  |  |  | 40,903 |
| Percentage allocated to common shareholders |  |  | 99.0 | % |  |  | 98.9 | %
(Some amounts may not reconcile due to rounding.) |  |  |  |  |  |  |  |

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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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