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Stocholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2019
Earnings Per Share [Abstract] |
Schedule of Weighted Average Number of Shares [Table Text Block] | The following table provides the computation of diluted weighted average number of common shares outstanding:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Computation of diluted weighted average shares outstanding: |  |  |  |  |  |  |
Basic weighted average shares outstanding | 54,449,256 |  |  | 51,182,502 |  |  | 53,180,850 |  |  | 51,436,228 |
Incremental shares from assumed exercise of stock options and vesting of restricted stock | 1,522,805 |  |  | 1,521,560 |  |  | 1,441,369 |  |  | 1,525,204 |
Incremental shares from assumed conversion of convertible notes | — |  |  | 1,559,830 |  |  | — |  |  | 1,559,830 |
Diluted weighted average shares outstanding | 55,972,061 |  |  | 54,263,892 |  |  | 54,622,219 |  |  | 54,521,262 |

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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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