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Common and Common Equivalent Shares | 6 Months Ended
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Jun. 30, 2022
Earnings Per Share [Abstract] |
Common and Common Equivalent Shares | 9. Common and Common Equivalent Shares: Basic net income per common share is calculated by dividing net income by the weighted average number of common shares outstanding during the period. Diluted net income per common share is calculated by dividing net income by the weighted average number of common and potential common shares outstanding during the period. Potential common shares consist of outstanding restricted stock and stock options and is calculated using the treasury stock method. The calculation of shares used in the basic and diluted net income per common share calculation for the three and six months ended June 30, 2022 and 2021 is as follows (in thousands):
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Weighted average number of common shares outstanding |  |  | 85,078 |  |  |  | 84,912 |  |  |  | 85,190 |  |  |  | 84,660 |
Weighted average number of dilutive common share equivalents |  |  | 541 |  |  |  | 1,021 |  |  |  | 724 |  |  |  | 993 |
Weighted average number of common and common equivalent shares outstanding |  |  | 85,619 |  |  |  | 85,933 |  |  |  | 85,914 |  |  |  | 85,653 |
Antidilutive securities not included in the diluted net income per common share calculation |  |  | 569 |  |  |  | 13 |  |  |  | 409 |  |  |  | 15 |

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