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Earnings Per Share | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per 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 |
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 The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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