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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2019
Stockholders' Equity Note [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:
|  | Year Ended December 31,
|  | 2019 |  | 2018 |  | 2017
Computation of diluted weighted average shares outstanding: |  |  |  |  |  |
Basic weighted average shares outstanding |  | 53,449,834 |  |  | 51,487,557 |  |  | 52,523,272 |
Incremental shares from assumed exercise of stock options and vesting of restricted stock |  | 1,464,053 |  |  | 1,499,713 |  |  | 1,793,375 |
Incremental shares from assumed conversion of convertible debentures |  | — |  |  | 1,640,477 |  |  | 799,680 |
Diluted weighted average shares outstanding |  | 54,913,887 |  |  | 54,627,747 |  |  | 55,116,327 |

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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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- References No definition available. + Details
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