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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) | Class A Common Stock [Member] | Class C Common Stock [Member] | Additional Paid-in Capital [Member] | AOCI Attributable to Parent [Member] | Retained Earnings [Member] | Treasury Stock [Member] | Total
--- | --- | --- | --- | --- | --- | --- | ---
March 31, 2020 at Dec. 31, 2019 | $ 32,215,558 | $ 5,001,774 | $ 46,091,112 | $ 13,726,514 | $ 101,256,229 | $ (1,580,582) | $ 196,710,605
Net earnings |  |  |  |  | 1,424,449 |  | 1,424,449
Other comprehensive income |  |  |  | (8,852,313) |  |  | (8,852,313)
Stock-based compensation expense |  |  | 65,877 |  |  |  | 65,877
Exercise of stock options | 44,822 |  | (33,930) |  |  |  | 10,892
Sale of treasury stock |  |  | 218,280 |  |  | 264,081 | 482,361
Purchase of treasury stock |  |  |  |  |  | (129,608) | (129,608)
Conversion Class C to Class A | 22,324 | (22,324) |  |  |  |  |
Stock dividends | 2,322 | (1,020) | 2,292 |  | (3,594) |  |
June 30, 2020 at Mar. 31, 2020 | 32,285,026 | 4,978,430 | 46,343,631 | 4,874,201 | 102,677,084 | (1,446,109) | 189,712,263
March 31, 2020 at Dec. 31, 2019 | 32,215,558 | 5,001,774 | 46,091,112 | 13,726,514 | 101,256,229 | (1,580,582) | 196,710,605
Net earnings |  |  |  |  |  |  | 21,981,496
June 30, 2020 at Jun. 30, 2020 | 33,115,108 | 5,102,890 | 48,917,891 | 16,894,089 | 120,126,524 | (1,542,276) | 222,614,226
March 31, 2020 at Mar. 31, 2020 | 32,285,026 | 4,978,430 | 46,343,631 | 4,874,201 | 102,677,084 | (1,446,109) | 189,712,263
Net earnings |  |  |  |  | 20,557,047 |  | 20,557,047
Other comprehensive income |  |  |  | 12,019,888 |  |  | 12,019,888
Stock-based compensation expense |  |  | 101,520 |  |  |  | 101,520
Exercise of stock options | 22,726 |  | (22,726) |  |  |  |
Sale of treasury stock |  |  | 319,676 |  |  | 664,546 | 984,222
Purchase of treasury stock |  |  |  |  |  | (760,713) | (760,713)
Stock dividends | 807,356 | 124,460 | 2,175,790 |  | (3,107,607) |  | (1)
June 30, 2020 at Jun. 30, 2020 | 33,115,108 | 5,102,890 | 48,917,891 | 16,894,089 | 120,126,524 | (1,542,276) | 222,614,226
March 31, 2020 at Dec. 31, 2020 | 33,191,566 | 5,359,206 | 50,287,253 | 23,243,133 | 153,739,167 | (1,833,272) | 263,987,053
Net earnings |  |  |  |  | 12,128,715 |  | 12,128,715
Other comprehensive income |  |  |  | (5,388,522) |  |  | (5,388,522)
Stock-based compensation expense |  |  | 39,153 |  |  |  | 39,153
Exercise of stock options | 55,852 |  | 33,401 |  |  |  | 89,253
Sale of treasury stock |  |  | 290,381 |  |  | 1,632,041 | 1,922,422
Purchase of treasury stock |  |  |  |  |  | (910,233) | (910,233)
Conversion Class C to Class A | 97,054 | (97,054) |  |  |  |  |
June 30, 2020 at Mar. 31, 2021 | 33,344,472 | 5,262,152 | 50,650,188 | 17,854,611 | 165,867,882 | (1,111,464) | 271,867,841
March 31, 2020 at Dec. 31, 2020 | 33,191,566 | 5,359,206 | 50,287,253 | 23,243,133 | 153,739,167 | (1,833,272) | 263,987,053
Net earnings |  |  |  |  |  |  | 23,386,194
June 30, 2020 at Jun. 30, 2021 | 35,123,042 | 5,525,260 | 57,394,514 | 21,598,498 | 168,415,007 | (2,207,608) | 285,848,713
March 31, 2020 at Mar. 31, 2021 | 33,344,472 | 5,262,152 | 50,650,188 | 17,854,611 | 165,867,882 | (1,111,464) | 271,867,841
Net earnings |  |  |  |  | 11,257,479 |  | 11,257,479
Other comprehensive income |  |  |  | 3,743,887 |  |  | 3,743,887
Exercise of stock options | 106,044 |  | 7,655 |  |  |  | 113,699
Sale of treasury stock |  |  | (38,048) |  |  | 1,499,862 | 1,461,814
Purchase of treasury stock |  |  |  |  |  | (2,596,006) | (2,596,006)
Stock dividends | 1,672,526 | 263,108 | 6,774,719 |  | (8,710,354) |  | (1)
June 30, 2020 at Jun. 30, 2021 | $ 35,123,042 | $ 5,525,260 | $ 57,394,514 | $ 21,598,498 | $ 168,415,007 | $ (2,207,608) | $ 285,848,713

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