CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY - USD ($)	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
Balance at Dec. 31, 2016	$ 5,914,560	$ (15,298,306)	$ 20,511,388	$ 136,892,311	$ 255,889	$ 148,275,842
Increase (decrease) in shareholders' equity
Net Income				41,719,424		41,719,424
Stock Repurchase		(7,209,454)				(7,209,454)
Exercise of Stock Options	28,527		1,056,406			1,084,933
Vested Restricted Stock	18,930		(413,184)			(394,254)
Stock Issuance	1,833		101,303			103,136
Stock Compensation Expense from Restricted Stock Grants and Equity Classified Stock Options			1,479,315			1,479,315
Cash Dividends				(997,461)		(997,461)
Other Comprehensive Income (Loss), Net of Income Tax					116,727	116,727
Balance at Dec. 31, 2017	5,963,850	(22,507,760)	22,735,228	177,614,274	372,616	184,178,208
Increase (decrease) in shareholders' equity
Net Income				37,167,790		37,167,790
Stock Repurchase		(9,837,242)				(9,837,242)
Exercise of Stock Options	8,520		189,849			198,369
Vested Restricted Stock	19,065		(517,439)			(498,374)
Stock Issuance	3,822		234,890			238,712
Stock Compensation Expense from Restricted Stock Grants and Equity Classified Stock Options			1,684,250			1,684,250
Cash Dividends				(1,484,167)		(1,484,167)
Other Comprehensive Income (Loss), Net of Income Tax					113,927	113,927
Balance at Dec. 31, 2018	5,995,257	(32,345,002)	24,326,778	213,297,897	486,543	211,761,473
Increase (decrease) in shareholders' equity
Net Income				114,972,858		114,972,858
Stock Repurchase		(41,095,712)				(41,095,712)
Vested Restricted Stock	12,957		(316,272)			(303,315)
Stock Issuance	9,004		522,910			531,914
Stock Compensation Expense from Restricted Stock Grants and Equity Classified Stock Options			2,156,379			2,156,379
Cash Dividends				(2,197,556)		(2,197,556)
Other Comprehensive Income (Loss), Net of Income Tax					(412,619)	(412,619)
Balance at Dec. 31, 2019	$ 6,017,218	$ (73,440,714)	$ 26,689,795	$ 326,073,199	$ 73,924	$ 285,413,422