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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Schedule Of Reconciliation Of Earnings/(Loss) Per Common And Diluted Share | The following table provides reconciliations of net income to net income available to common shareholders and the difference between average basic common shares outstanding and average diluted common shares outstanding:
(Dollars and shares in thousands, except per share data) |  | 2017 |  | 2016 |  | 2015
Net income/(loss) |  | $ | 176,980 |  |  | $ | 238,511 |  |  | $ | 97,313 |
Net income attributable to noncontrolling interest |  | 11,465 |  |  | 11,465 |  |  | 11,434 |
Net income/(loss) attributable to controlling interest |  | 165,515 |  |  | 227,046 |  |  | 85,879 |
Preferred stock dividends |  | 6,200 |  |  | 6,200 |  |  | 6,200 |
Net income/(loss) available to common shareholders |  | $ | 159,315 |  |  | $ | 220,846 |  |  | $ | 79,679 |
Weighted average common shares outstanding—basic |  | 241,436 |  |  | 232,700 |  |  | 234,189 |
Effect of dilutive securities |  | 3,017 |  |  | 2,592 |  |  | 2,077 |
Weighted average common shares outstanding—diluted |  | 244,453 |  |  | 235,292 |  |  | 236,266 |
Net income/(loss) per share available to common shareholders |  | $ | 0.66 |  |  | $ | 0.95 |  |  | $ | 0.34 |
Diluted income/(loss) per share available to common shareholders |  | $ | 0.65 |  |  | $ | 0.94 |  |  | $ | 0.34 |
Schedule Of Anti-Dilutive Options and Awards | The following table presents outstanding options and other equity awards that were excluded from the calculation of diluted earnings per share because they were either anti-dilutive (the exercise price was higher than the weighted-average market price for the period) or the performance conditions have not been met:
(Shares in thousands) |  | 2017 |  | 2016 |  | 2015
Stock options excluded from the calculation of diluted EPS |  | 2,468 |  |  | 2,610 |  |  | 3,559 |
Weighted average exercise price of stock options excluded from the calculation of diluted EPS |  | $ | 25.62 |  |  | $ | 26.29 |  |  | $ | 24.40 |
Other equity awards excluded from the calculation of diluted EPS |  | 176 |  |  | 37 |  |  | 98 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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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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