Consolidated Statements of Income (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest income:
Interest and fees on loans	$ 12,135,221	$ 12,219,130	$ 11,455,071
Interest on debt securities: Taxable	1,366,591	998,238	1,151,447
Interest on debt securities: Tax-exempt	1,055,727	1,110,237	1,015,261
Dividends	69,343	38,645	32,807
Interest on deposits in other banks	51,995	65,910	60,037
Interest on certificates of deposit in other banks	33,327	42,703	19,578
Total interest income	14,712,204	14,474,863	13,734,201
Interest expense:
Deposits	749,854	882,085	1,111,430
Federal funds purchased	258	15	4
Other short-term borrowings	169,661	295,034	53,765
Long-term debt	435,686	485,823	733,339
Total interest expense	1,355,459	1,662,957	1,898,538
Net interest income	13,356,745	12,811,906	11,835,663
Provision for loan losses	330,000	420,000	445,000
Net interest income after provision for loan losses	13,026,745	12,391,906	11,390,663
Noninterest income:
Service charges on deposit accounts	1,274,726	1,278,221	1,241,756
Income from trust services	241,131	227,622	205,047
Income from brokerage services	375,699	338,323	381,916
Income from insurance services	1,324,183	1,328,532	1,280,474
Income from mortgage banking services	645,241	939,874	1,675,936
Provision for foreclosed asset losses	0	0	(320,000)
Net gain (loss) on sale or disposition of assets	88,631	(68,088)	23,972
Net gain on sale of securities	293,508	311,800	337,804
Other income	743,319	734,887	697,929
Total noninterest income	4,986,438	5,091,171	5,524,834
Noninterest expense:
Salaries and employee benefits	8,359,019	8,455,375	8,717,337
Occupancy expense	1,060,822	1,025,293	1,006,426
Equipment expense	896,416	902,312	939,933
Data processing expense	1,129,617	1,096,790	1,081,840
Amortization of intangible assets	44,931	215,700	219,482
Other operating expenses	2,878,991	2,650,599	2,630,514
Total noninterest expenses	14,369,796	14,346,069	14,595,532
Income before income taxes	3,643,387	3,137,008	2,319,965
Provision for income taxes	739,557	364,664	380,878
Net income	$ 2,903,830	$ 2,772,344	$ 1,939,087
Basic earnings per share:
Net income	$ 1.14	$ 1.09	$ 0.76
Weighted average shares outstanding	2,547,837	2,547,837	2,547,837
Diluted earnings per share:
Net income	$ 1.14	$ 1.09	$ 0.76
Weighted average shares outstanding	2,547,837	2,547,837	2,547,837