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Common and Common Equivalent Shares | 12 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
Common and Common Equivalent Shares |
15. | Common and Common Equivalent Shares:
The calculation of shares used in the basic and diluted net income per share calculation for the years ended December 31, 2020, 2019, and 2018 is as follows (in thousands):
|  | Years Ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Weighted average number of common shares outstanding |  |  | 83,395 |  |  |  | 83,495 |  |  |  | 91,104 |
Weighted average number of dilutive common share equivalents (a) |  |  | — |  |  |  | 516 |  |  |  | 502 |
Weighted average number of common and common equivalent shares outstanding |  |  | 83,395 |  |  |  | 84,011 |  |  |  | 91,606 |
Antidilutive securities not included in the diluted net income per common share calculation |  |  | 1,034 |  |  |  | 516 |  |  |  | 214 |
(a) | Due to a loss from continuing operations for the year ended December 31, 2020, no incremental shares are included because the effect would be antidilutive.

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