Consolidated Statements of Income (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Interest Income
Interest and fees on loans	$ 25,711,146	$ 26,848,854	$ 26,472,658
Interest and dividends on securities available for sale:
Taxable interest income	992,725	1,133,531	1,278,251
Interest income exempt from federal income taxes	236,302	228,598	238,025
Dividends	68,610	46,176	65,298
Interest on federal funds sold	24	21	201
Interest on deposits in other banks	140,156	73,293	19,573
Total interest income	27,148,963	28,330,473	28,074,006
Interest Expense
Interest on deposits	3,885,042	5,035,625	5,598,144
Interest on federal funds purchased	37	1,330	41,341
Interest on Federal Home Loan Bank advances	990,551	969,815	1,050,444
Distribution on capital securities of subsidiary trusts	198,859	117,316	109,051
Total interest expense	5,074,489	6,124,086	6,798,980
Net interest income	22,074,474	22,206,387	21,275,026
Provision for loan losses	1,933,336	2,075,000	1,710,000
Net interest income after provision for loan losses	20,141,138	20,131,387	19,565,026
Other Income
Trust and estate income	1,243,383	1,059,573	898,927
Brokerage income	391,764	393,826	214,381
Service charges on deposit accounts	3,086,726	2,799,489	2,710,499
Other service charges, commissions and income	1,639,461	1,434,675	1,464,750
Total other-than-temporary impairment losses on securities	(228,306)	(1,370,032)	(1,225,641)
Less: Portion of gain/(loss) recognized in other comprehensive income before taxes	(39,179)	33,521	(454,007)
Net other-than-temporary impairment losses on securities	(189,127)	(1,403,553)	(771,634)
Gain on sale of securities	102,471	541,109	0
Total other income	6,274,678	4,825,119	4,516,923
Other Expenses
Salaries and benefits	10,545,581	10,541,346	9,871,987
Occupancy expense of premises	1,864,145	1,814,909	1,444,687
Furniture and equipment	1,152,160	1,251,277	1,099,171
Marketing expense	662,114	675,227	707,160
Legal, audit and consulting expense	1,078,880	1,028,635	1,287,152
Data processing expense	1,174,101	1,040,233	1,050,859
Federal Deposit Insurance Corporation expense	605,487	733,989	865,861
Loss on sale or impairment and expense of other real estate owned	1,109,555	198,245	156,094
Other operating expenses	2,671,023	2,912,415	3,025,559
Total other expenses	20,863,046	20,196,276	19,508,530
Income before income taxes	5,552,770	4,760,230	4,573,419
Income tax expense	1,435,355	1,092,914	1,155,941
Net Income	$ 4,117,415	$ 3,667,316	$ 3,417,478
Earnings per Share , basic (in dollars per share)	$ 1.12	$ 1.01	$ 0.95
Earnings per Share , assuming dilution (in dollars per share)	$ 1.12	$ 1.01	$ 0.95
Dividends per Share (in dollars per share)	$ 0.48	$ 0.72	$ 0.80