Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($)	Total	Common Stock	Additional Paid-In Capital	Treasury Stock	Accumulated Other Comprehensive Income	Retained Earnings
Balance at at Dec. 31, 2017	$ 77,923,454	$ 31,539	$ 12,212,844	$ (4,330,712)	$ 2,932,122	$ 67,077,661
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,730,117					1,730,117
Other Comprehensive Income, Net Of Tax:	(3,095,804)				(3,095,804)
Cash Dividends on Common Stock	(265,889)					265,889
Balance at at Mar. 31, 2018	76,299,897	31,543	12,220,859	(4,330,712)	447,409	67,930,798
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Value, Stock Options Exercised	8,019
Balance at at Dec. 31, 2017	77,923,454	31,539	12,212,844	(4,330,712)	2,932,122	67,077,661
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	3,550,071
Other Comprehensive Income, Net Of Tax:	(4,000,881)
Balance at at Jun. 30, 2018	76,951,167	31,544	12,223,149	(4,330,712)	(457,668)	69,484,854
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Value, Stock Options Exercised		1
Adjustments to Additional Paid in Capital, Share-based Compensation, Stock Options, Requisite Service Period Recognition			2,290
Balance at at Mar. 31, 2018	76,299,897	31,543	12,220,859	(4,330,712)	447,409	67,930,798
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,819,954					1,819,954
Other Comprehensive Income, Net Of Tax:	(905,077)				(905,077)
Cash Dividends on Common Stock	(265,898)					265,898
Balance at at Jun. 30, 2018	76,951,167	31,544	12,223,149	(4,330,712)	(457,668)	69,484,854
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Value, Stock Options Exercised	2,291
Balance at at Dec. 31, 2018	80,518,433	31,548	12,235,341	(4,330,712)	(27,909)	72,610,165
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	2,088,873					2,088,873
Other Comprehensive Income, Net Of Tax:	2,817,917				2,817,917
Stock Issued During Period, Value, Employee Stock Purchase Plan	12,009	5
Adjustments to Additional Paid in Capital, Share-based Compensation, Employee Stock Purchase Program, Requisite Service Period Recognition			12,004
Stock Issued During Period, Value, Stock Options Exercised		10
Adjustments to Additional Paid in Capital, Share-based Compensation, Stock Options, Requisite Service Period Recognition			19,990
Stock Issued During Period, Value, Conversion of Convertible Securities, Net of Adjustments	20,000
Cash Dividends on Common Stock	(265,982)					265,982
Balance at at Mar. 31, 2019	85,191,250	31,563	12,267,335	(4,330,712)	2,790,008	74,433,056
Balance at at Dec. 31, 2018	80,518,433	31,548	12,235,341	(4,330,712)	(27,909)	72,610,165
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	3,972,904
Other Comprehensive Income, Net Of Tax:	5,130,514
Balance at at Jun. 30, 2019	89,136,630	31,569	12,282,115	(4,330,712)	5,102,605	76,051,053
Balance at at Mar. 31, 2019	85,191,250	31,563	12,267,335	(4,330,712)	2,790,008	74,433,056
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,884,031					1,884,031
Other Comprehensive Income, Net Of Tax:	2,312,597				2,312,597
Stock Issued During Period, Value, Employee Stock Purchase Plan	14,786	6
Adjustments to Additional Paid in Capital, Share-based Compensation, Employee Stock Purchase Program, Requisite Service Period Recognition			14,780
Reclass from AOCI to Retained Earnings for stranded tax effect					0	0
Cash Dividends on Common Stock	(266,034)					266,034
Balance at at Jun. 30, 2019	$ 89,136,630	$ 31,569	$ 12,282,115	$ (4,330,712)	$ 5,102,605	$ 76,051,053