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Capital Structure and Per Share Data (Tables) | 12 Months Ended
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Dec. 31, 2014
Earnings Per Share [Abstract] |
Dilutive Effect on Earnings Per Share | The following table illustrates the dilutive effect of such items on earnings per share for the years ended December 31, 2014, 2013 and 2012:
|  |  | Year Ended December 31, 2014 |  |
|  |  |  |  |  |  | Income (Loss) |  |  | Income (Loss) |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  | From Continuing |  |  | From Discontinued |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  | Operations |  |  | Operations |  |  | Net Income (Loss) |  |
|  |  | Weighted |  |  |  |  |  |  | Per |  |  |  |  |  |  | Per |  |  |  |  |  |  | Per |  |
|  |  | Average |  |  |  |  |  |  | Share |  |  |  |  |  |  | Share |  |  |  |  |  |  | Share |  |
|  |  | Shares |  |  | Amount |  |  | Amount |  |  | Amount |  |  | Amount |  |  | Amount |  |  | Amount |  |
|  |  | (In thousands, except per share amounts) |  |
| Earnings (loss) and shares |  |  | 52,065 |  |  | $ | 98,559 |  |  |  |  |  |  | $ | (1,342 | ) |  |  |  |  |  | $ | 97,217 |  |  |  |  |  |
| Effect of participating securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Non-vested restricted stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| and stock units |  |  |  |  |  |  | (311 | ) |  |  |  |  |  |  | - |  |  |  |  |  |  |  | (311 | ) |  |  |  |  |
| Basic earnings (loss) and shares |  |  | 52,065 |  |  | $ | 98,248 |  |  | $ | 1.89 |  |  | $ | (1,342 | ) |  | $ | (0.03 | ) |  | $ | 96,906 |  |  | $ | 1.86 |  |
| Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Stock compensation plans |  |  | 498 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Diluted earnings (loss) and shares |  |  | 52,563 |  |  | $ | 98,248 |  |  | $ | 1.87 |  |  | $ | (1,342 | ) |  | $ | (0.03 | ) |  | $ | 96,906 |  |  | $ | 1.84 |  |
|  |  | Year Ended December 31, 2013 |  |
|  |  |  |  |  |  | Income (Loss) |  |  | Income (Loss) |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  | From Continuing |  |  | From Discontinued |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  | Operations |  |  | Operations |  |  | Net Income (Loss) |  |
|  |  | Weighted |  |  |  |  |  |  | Per |  |  |  |  |  |  | Per |  |  |  |  |  |  | Per |  |
|  |  | Average |  |  |  |  |  |  | Share |  |  |  |  |  |  | Share |  |  |  |  |  |  | Share |  |
|  |  | Shares |  |  | Amount |  |  | Amount |  |  | Amount |  |  | Amount |  |  | Amount |  |  | Amount |  |
|  |  | (In thousands, except per share amounts) |  |
| Earnings (loss) and shares |  |  | 52,556 |  |  | $ | 84,678 |  |  |  |  |  |  | $ | (3,060 | ) |  |  |  |  |  | $ | 81,618 |  |  |  |  |  |
| Effect of participating securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Non-vested restricted stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| and stock units |  |  |  |  |  |  | (601 | ) |  |  |  |  |  |  | - |  |  |  |  |  |  |  | (601 | ) |  |  |  |  |
| Basic earnings (loss) and shares |  |  | 52,556 |  |  | $ | 84,077 |  |  | $ | 1.60 |  |  | $ | (3,060 | ) |  | $ | (0.06 | ) |  | $ | 81,017 |  |  | $ | 1.54 |  |
| Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Stock compensation plans |  |  | 385 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Diluted earnings (loss) and shares |  |  | 52,941 |  |  | $ | 84,077 |  |  | $ | 1.59 |  |  | $ | (3,060 | ) |  | $ | (0.06 | ) |  | $ | 81,017 |  |  | $ | 1.53 |  |
|  |  | Year Ended December 31, 2012 |  |
|  |  |  |  |  |  | Income (Loss) |  |  | Income (Loss) |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  | From Continuing |  |  | From Discontinued |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  | Operations |  |  | Operations |  |  | Net Income (Loss) |  |
|  |  | Weighted |  |  |  |  |  |  | Per |  |  |  |  |  |  | Per |  |  |  |  |  |  | Per |  |
|  |  | Average |  |  |  |  |  |  | Share |  |  |  |  |  |  | Share |  |  |  |  |  |  | Share |  |
|  |  | Shares |  |  | Amount |  |  | Amount |  |  | Amount |  |  | Amount |  |  | Amount |  |  | Amount |  |
|  |  | (In thousands, except per share amounts) |  |
| Earnings (loss) and shares |  |  | 53,550 |  |  | $ | 91,261 |  |  |  |  |  |  | $ | (2,160 | ) |  |  |  |  |  | $ | 89,101 |  |  |  |  |  |
| Effect of participating securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Non-vested restricted stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| and stock units |  |  |  |  |  |  | (1,381 | ) |  |  |  |  |  |  | - |  |  |  |  |  |  |  | (1,381 | ) |  |  |  |  |
| Basic earnings (loss) and shares |  |  | 53,550 |  |  | $ | 89,880 |  |  | $ | 1.68 |  |  | $ | (2,160 | ) |  | $ | (0.04 | ) |  | $ | 87,720 |  |  | $ | 1.64 |  |
| Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Contingently convertible |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| debt (5.0% Convertible Notes) |  |  | 6,411 |  |  |  | 4,617 |  |  |  |  |  |  |  | 64 |  |  |  |  |  |  |  | 4,681 |  |  |  |  |  |
| Stock compensation plans |  |  | 445 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Diluted earnings (loss) and shares |  |  | 60,406 |  |  | $ | 94,497 |  |  | $ | 1.56 |  |  | $ | (2,096 | ) |  | $ | (0.03 | ) |  | $ | 92,401 |  |  | $ | 1.53 |  |

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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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