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Earnings (Loss) Per Share | 12 Months Ended
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Dec. 31, 2019
Earnings Per Share [Abstract] |
Earnings (Loss) Per Share | Earnings (Loss) Per Share Basic earnings (loss) per common share is calculated by dividing net income (loss) by the weighted average number of common shares outstanding for the period. Diluted earnings (loss) per common share is calculated by dividing net income (loss) by the weighted average number of common shares outstanding combined with dilutive common share equivalents outstanding, if the effect is dilutive. Potentially dilutive securities were excluded from the calculation of diluted loss per share for the years ended December 31, 2019, 2018, and 2017, since including them would have an anti-dilutive effect on loss per share due to the loss from continuing operations incurred during the period. Securities convertible into shares of common stock that were not considered in the diluted loss per share calculations were 0.1 million restricted stock units and 3.0 million stock options for the year ended December 31, 2019, and 0.7 million restricted stock units for the year ended December 31, 2018, and 0.7 million stock options and 0.8 million restricted stock units for the year ended December 31, 2017. A reconciliation of the number of shares used for the basic and diluted earnings (loss) per common share computations is as follows (in thousands):
| Years ended December 31,
| 2019 |  | 2018 |  | 2017
Weighted average common shares outstanding - Basic | 58,750 |  |  | 57,995 |  |  | 57,580 |
Assumed conversions: |  |  |  |  |
Incremental common shares from stock options | — |  |  | — |  |  | — |
Incremental common shares from restricted stock units | — |  |  | — |  |  | — |
Weighted average common shares outstanding - Diluted | 58,750 |  |  | 57,995 |  |  | 57,580 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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