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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2021
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | The basic and diluted earnings per share amounts were calculated as follows: Schedule of Earnings Per Share, Basic and Diluted
|  | Three Months Ended September 30 |  |  | Nine Months Ended September 30 |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net earnings |  | $ | 10,790,730 |  |  | $ | 29,304,769 |  |  | $ | 34,176,924 |  |  | $ | 51,286,265 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted-average shares outstanding |  |  | 20,160,912 |  |  |  | 19,830,879 |  |  |  | 20,117,257 |  |  |  | 19,717,877 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee stock options |  |  | 819,969 |  |  |  | 587,720 |  |  |  | 810,438 |  |  |  | 424,206 |
Diluted weighted-average shares outstanding |  |  | 20,980,881 |  |  |  | 20,418,599 |  |  |  | 20,927,695 |  |  |  | 20,142,083 |
Basic net earnings per share |  | $ | 0.54 |  |  | $ | 1.48 |  |  | $ | 1.70 |  |  | $ | 2.60 |
Diluted net earnings per share |  | $ | 0.51 |  |  | $ | 1.44 |  |  | $ | 1.63 |  |  | $ | 2.55 |
Schedule of Activity of Stock Option Plans | 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 |  |  | 405,210 |  |  |  | 61,720 |
Conversion of Class C to Class A |  |  | 13,224 |  |  |  | (13,224 | )
Outstanding shares at September 30, 2020 |  |  | 16,559,987 |  |  |  | 2,549,383 |
Outstanding shares at December 31, 2020 |  |  | 16,595,783 |  |  |  | 2,679,603 |
Exercise of stock options |  |  | 111,608 |  |  |  | — |
Stock dividends |  |  | 837,410 |  |  |  | 131,553 |
Conversion of Class C to Class A |  |  | 49,247 |  |  |  | (49,247 | )
Outstanding shares at September 30, 2021 |  |  | 17,594,048 |  |  |  | 2,761,909 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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