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Per Share Data and Stockholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2013
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 third quarter and nine-month periods ended September 30, 2013 and 2012:
|  | Third Quarter Ended September 30, 2013 |
|  |  |  |  | Income (Loss) From Continuing Operations |  |  | Income (Loss) From Discontinued Operations |  |  | Net Income (Loss) |
|  | Weighted Average Shares |  |  | Amount |  |  | Per Share Amount |  |  | Amount |  |  | Per Share Amount |  |  | Amount |  |  | Per Share Amount |
|  | (In thousands, except per share amounts) |
Earnings (loss) and shares |  |  | 52,553 |  |  | $ | 24,702 |  |  |  |  |  |  | $ | (1,375 | ) |  |  |  |  |  | $ | 23,327 |  |  |  |  |
Effect of participating securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-vested restricted stock and stock units |  |  |  |  |  |  | (172 | ) |  |  |  |  |  |  | — |  |  |  |  |  |  |  | (172 | ) |  |  |  |
Basic earnings (loss) and shares |  |  | 52,553 |  |  | $ | 24,530 |  |  | $ | 0.47 |  |  | $ | (1,375 | ) |  | $ | (0.03 | ) |  | $ | 23,155 |  |  | $ | 0.44 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock compensation plans |  |  | 365 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted earnings (loss) and shares |  |  | 52,918 |  |  | $ | 24,530 |  |  | $ | 0.46 |  |  | $ | (1,375 | ) |  | $ | (0.02 | ) |  | $ | 23,155 |  |  | $ | 0.44 |
|  | Third Quarter Ended September 30, 2012 |
|  |  |  |  | Income (Loss) From Continuing Operations |  |  | Income (Loss) From Discontinued Operations |  |  | Net Income (Loss) |
|  | Weighted Average Shares |  |  | Amount |  |  | Per Share Amount |  |  | Amount |  |  | Per Share Amount |  |  | Amount |  |  | Per Share Amount |
|  | (In thousands, except per share amounts) |
Earnings (loss) and shares |  |  | 55,069 |  |  | $ | 12,326 |  |  |  |  |  |  | $ | (2,284 | ) |  |  |  |  |  | $ | 10,042 |  |  |  |  |
Effect of participating securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-vested restricted stock and stock units |  |  |  |  |  |  | (182 | ) |  |  |  |  |  |  | — |  |  |  |  |  |  |  | (182 | ) |  |  |  |
Basic earnings (loss) and shares |  |  | 55,069 |  |  | $ | 12,144 |  |  | $ | 0.22 |  |  | $ | (2,284 | ) |  | $ | (0.04 | ) |  | $ | 9,860 |  |  | $ | 0.18 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingently convertible debt (5.0% Convertible Notes) |  |  | 3,534 |  |  |  | 618 |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  | 620 |  |  |  |  |
Stock compensation plans |  |  | 408 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted earnings (loss) and shares |  |  | 59,011 |  |  | $ | 12,762 |  |  | $ | 0.22 |  |  | $ | (2,282 | ) |  | $ | (0.04 | ) |  | $ | 10,480 |  |  | $ | 0.18 |
|  | Nine Months Ended September 30, 2013 |
|  |  |  |  | Income (Loss) From Continuing Operations |  |  | Income (Loss) From Discontinued Operations |  |  | Net Income (Loss) |
|  | Weighted Average Shares |  |  | Amount |  |  | Per Share Amount |  |  | Amount |  |  | Per Share Amount |  |  | Amount |  |  | Per Share Amount |
|  | (In thousands, except per share amounts) |
Earnings (loss) and shares |  |  | 52,578 |  |  | $ | 55,117 |  |  |  |  |  |  | $ | (1,582 | ) |  |  |  |  |  | $ | 53,535 |  |  |  |  |
Effect of participating securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-vested restricted stock and stock units |  |  |  |  |  |  | (393 | ) |  |  |  |  |  |  | — |  |  |  |  |  |  |  | (393 | ) |  |  |  |
Basic earnings (loss) and shares |  |  | 52,578 |  |  | $ | 54,724 |  |  | $ | 1.04 |  |  | $ | (1,582 | ) |  | $ | (0.03 | ) |  | $ | 53,142 |  |  | $ | 1.01 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock compensation plans |  |  | 352 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted earnings (loss) and shares |  |  | 52,930 |  |  | $ | 54,724 |  |  | $ | 1.03 |  |  | $ | (1,582 | ) |  | $ | (0.03 | ) |  | $ | 53,142 |  |  | $ | 1.00 |
|  | Nine Months Ended September 30, 2012 |
|  |  |  |  | Income (Loss) From Continuing Operations |  |  | Income (Loss) From Discontinued Operations |  |  | Net Income (Loss) |
|  | Weighted Average Shares |  |  | Amount |  |  | Per Share Amount |  |  | Amount |  |  | Per Share Amount |  |  | Amount |  |  | Per Share Amount |
|  | (In thousands, except per share amounts) |
Earnings (loss) and shares |  |  | 53,302 |  |  | $ | 62,470 |  |  |  |  |  |  | $ | (3,751 | ) |  |  |  |  |  | $ | 58,719 |  |  |  |  |
Effect of participating securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-vested restricted stock and stock units |  |  |  |  |  |  | (949 | ) |  |  |  |  |  |  | — |  |  |  |  |  |  |  | (949 | ) |  |  |  |
Basic earnings (loss) and shares |  |  | 53,302 |  |  | $ | 61,521 |  |  | $ | 1.15 |  |  | $ | (3,751 | ) |  | $ | (0.07 | ) |  | $ | 57,770 |  |  | $ | 1.08 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingently convertible debt (5.0% Convertible Notes) |  |  | 8,563 |  |  |  | 4,599 |  |  |  |  |  |  |  | 82 |  |  |  |  |  |  |  | 4,681 |  |  |  |  |
Stock compensation plans |  |  | 435 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted earnings (loss) and shares |  |  | 62,300 |  |  | $ | 66,120 |  |  | $ | 1.06 |  |  | $ | (3,669 | ) |  | $ | (0.06 | ) |  | $ | 62,451 |  |  | $ | 1.00 |

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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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