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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2018
Basic and Diluted Weighted Average Shares Outstanding | Basic and diluted weighted average shares outstanding were as follows:
|  | Three months ended March 31, |
|  | 2018 |  |  | 2017 |
Basic weighted average common shares outstanding |  |  | 43,621,270 |  |  |  | 33,891,702 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Stock options and restricted stock awards |  |  | 389,702 |  |  |  | 490,620 |
Convertible senior notes |  |  | 315,760 |  |  |  | — |
Weighted average common shares, assuming dilution |  |  | 44,326,732 |  |  |  | 34,382,322 |

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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://www.xbrl.org/2003/role/presentationRef -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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