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Reconciliation of Basic and Diluted Shares | 6 Months Ended
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Jun. 30, 2020
Earnings Per Share [Abstract] |
Reconciliation of Basic and Diluted Shares | Reconciliation of Basic and Diluted Shares
|  | Three Months Ended |  |  |  | Six Months Ended |  |
|  | June 30 |  |  |  | June 30 |  |
(In thousands, except per share amounts) |  | 2020 |  | 2019 |  | 2020 |  | 2019
Income (loss) from continuing operations attributable to Harsco Corporation common stockholders |  | $ | (10,750) |  |  | $ | (2,852) |  |  | $ | (19,532) |  |  | $ | 7,622 |
Weighted-average shares outstanding: |  |  |  |  |  |  |  |
Weighted-average shares outstanding - basic |  | 78,987 |  |  | 80,328 |  |  | 78,874 |  |  | 80,119 |
Dilutive effect of stock-based compensation |  | — |  |  | — |  |  | — |  |  | 1,955 |
Weighted-average shares outstanding - diluted |  | 78,987 |  |  | 80,328 |  |  | 78,874 |  |  | 82,074 |
Earnings (loss) from continuing operations per common share, attributable to Harsco Corporation common stockholders: |  |  |  |  |  |  |  |
Basic |  | $ | (0.14) |  |  | $ | (0.04) |  |  | $ | (0.25) |  |  | $ | 0.10 |
Diluted |  | $ | (0.14) |  |  | $ | (0.04) |  |  | $ | (0.25) |  |  | $ | 0.09 |
The following average outstanding stock-based compensation units were not included in the computation of diluted earnings per share because the effect was antidilutive:
|  | Three Months Ended |  |  |  | Six Months Ended |  |
|  | June 30 |  |  |  | June 30 |  |
(In thousands) |  | 2020 |  | 2019 |  | 2020 |  | 2019
Restricted stock units |  | 739 |  |  | 443 |  |  | 744 |  |  | — |
Stock appreciation rights |  | 2,472 |  |  | 1,919 |  |  | 2,558 |  |  | 389 |
Performance share units |  | 896 |  |  | 685 |  |  | 918 |  |  | 116 |

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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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