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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2019
Earnings Per Share [Abstract] |
Schedule of Weighted-Average Number of Shares | Weighted-average Common Shares outstanding used in calculating basic and diluted earnings per share were as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended | ​ | Nine months ended | ​ | ​
​ | ​ | September 30, | ​ | September 30, | ​ | ​
​ |  | 2019 |  | 2018 |  | 2019 |  | 2018 | ​ | ​
Basic weighted-average Common Shares outstanding | ​ | 27,369,824 | ​ | 28,452,807 | ​ | 27,928,760 | ​ | 28,383,843 | ​ | ​
Effect of dilutive shares | ​ | 425,687 | ​ | 612,239 | ​ | 496,484 | ​ | 689,257 | ​ | ​
Diluted weighted-average Common Shares outstanding | ​ | 27,795,511 | ​ | 29,065,046 | ​ | 28,425,244 | ​ | 29,073,100 | ​ | ​

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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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