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Earnings Per Share | 6 Months Ended
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Jun. 30, 2021
Earnings Per Share [Abstract] |
Earnings Per Share | 6) Earnings Per Share The basic and diluted earnings per share amounts were calculated as follows:
Schedule of Earnings Per Share, Basic and Diluted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Three Months Ended 30-June |  | Six Months Ended 30-June
|  |  | 2021 |  |  |  | 2020 |  |  |  | 2021 |  |  |  | 2020 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings |  | $ | 11,257,479 |  |  | $ | 20,557,047 |  |  | $ | 23,386,194 |  |  | $ | 21,981,496 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted-average shares outstanding |  |  | 20,106,954 |  |  |  | 19,719,792 |  |  |  | 20,093,834 |  |  |  | 19,658,351 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee stock options |  |  | 784,817 |  |  |  | 439,593 |  |  |  | 826,048 |  |  |  | 349,502 |
Diluted weighted-average shares outstanding |  |  | 20,891,771 |  |  |  | 20,159,385 |  |  |  | 20,919,882 |  |  |  | 20,007,853 |
Basic net earnings per share |  | $ | 0.56 |  |  | $ | 1.04 |  |  | $ | 1.16 |  |  | $ | 1.12 |
Diluted net earnings per share |  | $ | 0.54 |  |  | $ | 1.02 |  |  | $ | 1.12 |  |  | $ | 1.10 |
Net earnings per share amounts have been retroactively adjusted for the effect of annual stock dividends. For the six months June 30, 2021 and 2020,there were 0 and 0 of anti-dilutive employee stock option shares, respectively, that were not included in the computation of diluted net earnings per common share as their effect would be anti-dilutive. Basic and diluted earnings per share amounts are the same for each class of common stock. The following table summarizes the activity in shares of capital stock for the periods presented:
Schedule of Activity of Stock Option Plans |  |  |  |
|  | Class A |  | Class C
Outstanding shares at December 31, 2019 |  |  | 16,107,779 |  |  |  | 2,500,887 |
Exercise of stock options |  |  | 33,774 |  |  |  | — |
Stock dividends |  |  | 404,839 |  |  |  | 61,720 |
Conversion of Class C to Class A |  |  | 11,162 |  |  |  | (11,162 | )
Outstanding shares at June 30, 2020 |  |  | 16,557,554 |  |  |  | 2,551,445 |
Outstanding shares at December 31, 2020 |  |  | 16,595,783 |  |  |  | 2,679,603 |
Exercise of stock options |  |  | 80,948 |  |  |  | — |
Stock dividends |  |  | 836,263 |  |  |  | 131,554 |
Conversion of Class C to Class A |  |  | 48,527 |  |  |  | (48,527 | )
Outstanding shares at June 30, 2021 |  |  | 17,561,521 |  |  |  | 2,762,630 |

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