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Earnings per Common Share | 6 Months Ended
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Jun. 30, 2019
Earnings Per Share [Abstract] |
Earnings per Common Share | Earnings per Share Basic (loss) earnings per share are based on the weighted-average number of shares of common stock outstanding. Diluted earnings per share are based upon the weighted-average number of shares of common stock outstanding plus all potentially dilutive securities that were assumed to be converted into common shares at the beginning of the period under the treasury stock method. This method requires the effect of potentially dilutive common stock equivalents be excluded from the calculation of diluted earnings per share for the periods in which net losses are reported because the effect is anti-dilutive. The following table reconciles the number of common shares used in calculating the basic and diluted net earnings per share:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Basic weighted-average common shares outstanding 1 | 16,538,501 |  |  | 16,486,935 |  |  | 16,527,448 |  |  | 16,491,366 |
Incremental shares due to: |  |  |  |  |  |  |
Restricted stock units | — |  |  | 20,970 |  |  | 16,570 |  |  | 29,530 |
Performance shares | — |  |  | 47,266 |  |  | 7,569 |  |  | 52,051 |
Stock options | — |  |  | — |  |  | — |  |  | 90 |
Diluted weighted-average common shares outstanding | 16,538,501 |  |  | 16,555,171 |  |  | 16,551,587 |  |  | 16,573,037 |
Basic net (loss) earnings per common share | $ | (0.03 | ) |  | $ | 0.42 |  |  | $ | 0.21 |  |  | $ | 0.58 |
Diluted net (loss) earnings per common share | (0.03 | ) |  | 0.42 |  |  | 0.21 |  |  | 0.58 |
Anti-dilutive shares excluded from calculation | 1,104,277 |  |  | 1,029,983 |  |  | 1,018,641 |  |  | 912,863 |
1 | Basic weighted-average common shares outstanding includes restricted stock unit awards that are fully vested, but are deferred for future issuance.

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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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