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Long-term Incentive Plans (Tables) | 12 Months Ended
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Dec. 31, 2017
Long-Term Incentive Plans [Abstract] |
Restricted Shares Outstanding |
|  |  | Restricted Share Activity
|  |  | 2017 |  | 2016 |  | 2015
|  |  | Number of Shares |  | Weighted Average Price Per Share |  | Number of Shares |  | Weighted Average Price Per Share |  | Number of Shares |  | Weighted Average Price Per Share
| Outstanding at beginning of year |  | 3,916,661 |  | $ | 9.3553 |  | 4,727,319 |  | $ | 9.9302 |  | 6,358,826 |  | $ | 10.0047
| Granted |  | 708,529 |  |  | 9.3740 |  | 756,381 |  |  | 8.2722 |  | 481,636 |  |  | 8.8012
| Vested |  | (1,051,657) |  |  | 9.9732 |  | (917,039) |  |  | 13.6196 |  | (2,112,343) |  |  | 9.8988
| Forfeited |  | (1,180,555) |  |  | 8.2912 |  | (650,000) |  |  | 6.2601 |  | (800) |  |  | 5.0500
| Outstanding at end of year |  | 2,392,978 |  | $ | 9.6142 |  | 3,916,661 |  | $ | 9.3553 |  | 4,727,319 |  | $ | 9.9302
Stock Options Outstanding |
|  |  | 2017 |  | 2016 |  | 2015 |
|  |  |  |  |  | Weighted |  |  |  | Weighted |  |  |  | Weighted |
|  |  |  |  |  | Average |  |  |  | Average |  |  |  | Average |
|  |  | Number of |  |  | Price |  | Number of |  | Price |  | Number of |  | Price |
Options |  | Shares |  |  | Per Share |  | Shares |  | Per Share |  | Shares |  | Per Share |
Outstanding at beginning of year |  | 237,800 |  | $ | 14.6689 |  | 2,325,300 |  | $ | 6.3703 |  | 2,548,000 |  | $ | 10.9888 |
Exercised |  | (200,000) |  |  | 5.0500 |  | (2,050,000) |  |  | 4.4722 |  | - |  |  | - |
Expired or forfeited |  | (37,800) |  |  | 65.5624 |  | (37,500) |  |  | 57.5100 |  | (222,700) |  |  | 59.2118 |
Outstanding at end of year |  | - |  | $ | - |  | 237,800 |  | $ | 14.6689 |  | 2,325,300 |  | $ | 6.3703 |
Exercisable at end of year |  | - |  | $ | - |  | 237,800 |  | $ | 14.6689 |  | 2,325,300 |  | $ | 6.3703 |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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