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Income (Loss) Per Share (Tables) | 6 Months Ended
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Jun. 30, 2020
Income (Loss) Per Share |
Weighted Average Number of Common Shares Outstanding | The weighted average number of common shares outstanding is calculated as follows (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Six Months Ended
​ | ​ | June 30, | ​ | June 30,
​ |  | 2020 |  | 2019 |  | 2020 |  | 2019
Weighted average shares outstanding - basic | ​ | 54,974 | ​ | 51,440 | ​ | 54,943 | ​ | 51,395
Effect of dilutive stock-based compensation | ​ | — | ​ | 118 | ​ | — | ​ | 167
Effect of dilutive put rights |  | — |  | 268 |  | — |  | 268
Weighted average shares outstanding - diluted |  | 54,974 |  | 51,826 |  | 54,943 |  | 51,830

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + 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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