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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
Reconciliation of Number of Common Shares Used in Calculating Basic and Diluted Net Earnings per Share | The following table reconciles the number of common shares used in calculating the basic and diluted net earnings per share:
|  | December 31,
(In thousands - except per share data) |  | 2020 |  | 2019 |  | 2018
Basic average common shares outstanding 1 |  | 16,569 |  |  | 16,533 |  |  | 16,487 |
Incremental shares due to: |  |  |  |  |  |
Stock based awards |  | 141 |  |  | — |  |  | — |
Performance Shares |  | 14 |  |  | — |  |  | — |
Diluted average common shares outstanding |  | 16,724 |  |  | 16,533 |  |  | 16,487 |
Basic net income (loss) per common share |  | $ | 4.65 |  |  | $ | (0.34) |  |  | $ | (8.72) |
Diluted net income (loss) per common share |  | $ | 4.61 |  |  | $ | (0.34) |  |  | $ | (8.72) |

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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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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