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Consolidated Statements of Stockholders' Equity - USD ($)
Common Stock [Member]
Common Class A [Member]
Common Stock [Member]
Common Class C [Member]
Additional Paid-in Capital [Member]
AOCI Attributable to Parent [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Total
Beginning balance, value 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 55,596,613 55,596,613
Other comprehensive income (loss) 9,516,619 9,516,619
Stock based compensation expense 358,878 358,878
Exercise of stock options 137,940 261,640 432,572 832,152
Sale of treasury stock 1,224,877 2,715,071 3,939,948
Purchase of treasury stock (2,967,761) (2,967,761)
Stock dividends 810,420 123,440 2,179,814 (3,113,675) (1)
Conversion Class C to Class A 27,648 (27,648)
Ending balance, value 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 39,518,990 39,518,990
Other comprehensive income (loss) (5,172,685) (5,172,685)
Stock based compensation expense 118,384 118,384
Exercise of stock options 320,564 209,312 547,549 1,077,425
Sale of treasury stock 250,019 5,757,383 6,007,402
Purchase of treasury stock (5,769,735) (5,769,735)
Stock dividends 1,674,820 263,106 6,782,742 (8,720,668)
Conversion Class C to Class A 98,494 (98,494)
Ending balance, value at Dec. 31, 2021 $ 35,285,444 $ 5,733,130 $ 57,985,947 $ 18,070,448 $ 184,537,489 $ (1,845,624) $ 299,766,834