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Capital Structure and Per Share Data (Tables) | 12 Months Ended
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Dec. 31, 2018
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 2018, 2017 and 2016:
| Year Ended December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |
|  |  | Income (Loss) |  |  |  | Income (Loss) |  |  |  |  |  |
|  |  | From Continuing Operations |  |  |  | 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 | 42,708 |  | $ | 52,390 |  |  |  | $ | (740) |  |  |  | $ | 51,650 |  |
Effect of participating securities: |  |  |  |  |  |  |  |  |  |  |  |  |
Non-vested restricted stock |  |  | (50) |  |  |  | — |  |  |  | (50) |  |
Basic earnings (loss) and shares | 42,708 |  | $ | 52,340 |  | $ | 1.23 |  | $ | (740) |  | $ | (0.02) |  | $ | 51,600 |  | $ | 1.21
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |
Stock compensation plans | 242 |  |  |  |  |  |  |  |  |  |  |  |
Diluted earnings (loss) and shares | 42,950 |  | $ | 52,340 |  | $ | 1.22 |  | $ | (740) |  | $ | (0.02) |  | $ | 51,600 |  | $ | 1.20
| Year Ended December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |
|  |  | Income (Loss) |  |  |  | Income (Loss) |  |  |  |  |  |
|  |  | From Continuing Operations |  |  |  | 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 | 43,997 |  | $ | 94,153 |  |  |  | $ | (1,170) |  |  |  | $ | 92,983 |  |
Effect of participating securities: |  |  |  |  |  |  |  |  |  |  |  |  |
Non-vested restricted stock |  |  | (85) |  |  |  | — |  |  |  | (85) |  |
Basic earnings (loss) and shares | 43,997 |  | $ | 94,068 |  | $ | 2.14 |  | $ | (1,170) |  | $ | (0.03) |  | $ | 92,898 |  | $ | 2.11
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |
Stock compensation plans | 361 |  |  |  |  |  |  |  |  |  |  |  |
Diluted earnings (loss) and shares | 44,358 |  | $ | 94,068 |  | $ | 2.12 |  | $ | (1,170) |  | $ | (0.03) |  | $ | 92,898 |  | $ | 2.09
| Year Ended December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |
|  |  | Income (Loss) |  |  |  | Income (Loss) |  |  |  |  |  |
|  |  | From Continuing Operations |  |  |  | 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 | 45,637 |  | $ | 94,516 |  |  |  | $ | (1,323) |  |  |  | $ | 93,193 |  |
Effect of participating securities: |  |  |  |  |  |  |  |  |  |  |  |  |
Non-vested restricted stock and restricted stock units |  |  | (52) |  |  |  | — |  |  |  | (52) |  |
Basic earnings (loss) and shares | 45,637 |  | $ | 94,464 |  | $ | 2.07 |  | $ | (1,323) |  | $ | (0.03) |  | $ | 93,141 |  | $ | 2.04
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |
Stock compensation plans | 311 |  |  |  |  |  |  |  |  |  |  |  |
Diluted earnings (loss) and shares | 45,948 |  | $ | 94,464 |  | $ | 2.06 |  | $ | (1,323) |  | $ | (0.03) |  | $ | 93,141 |  | $ | 2.03

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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://fasb.org/us-gaap/role/ref/legacyRef -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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