Consolidated Statements of Income - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest income:
Loans, including fees	$ 40,212,379	$ 34,844,200	$ 32,802,823
Securities:
Taxable	3,447,684	4,152,507	4,138,453
Tax-exempt	1,158,061	1,080,008	914,635
Federal funds sold	19,159	18,480	24,964
Restricted equity securities	280,985	268,171	258,300
Interest-bearing deposits in financial institutions	276,488	140,367	147,569
Total interest income	45,394,756	40,503,733	38,286,744
Interest expense:
Interest-bearing deposits	1,489,470	748,082	599,309
Savings and money market accounts	2,859,064	2,732,985	2,753,858
Time deposits	2,084,771	2,031,267	2,322,462
Federal funds purchased	21,612	23,687	6,771
Securities sold under agreements to repurchase	1,311	14,625	26,496
Federal Home Loan Bank advances	475,308	179,866	162,000
Total interest expense	6,931,536	5,730,512	5,870,896
Net interest income	38,463,220	34,773,221	32,415,848
Provision for loan and lease losses	2,828,633	1,650,675	3,868,855
Net interest income after provision for loan and lease losses	35,634,587	33,122,546	28,546,993
Noninterest income:
Service charges on deposit accounts	1,108,153	909,698	1,079,931
Loan commitment fees	1,118,565	822,162	941,218
Net gain on sale of securities	120,873	55,023	13,457
Mortgage banking income	7,375,064	5,961,766	4,067,013
Other noninterest income	1,361,794	1,134,861	1,317,623
Total noninterest income	11,084,449	8,883,510	7,419,242
Noninterest expense:
Salaries and employee benefits	20,460,510	19,278,328	17,474,156
Data processing and software	2,372,854	2,316,707	2,566,371
Professional fees	1,553,680	1,469,031	1,357,368
Occupancy	1,498,405	1,538,157	1,511,687
Equipment	1,743,340	1,598,156	1,259,000
Regulatory fees	1,090,735	914,959	940,842
Other operating	4,409,324	3,861,435	3,452,681
Total noninterest expense	33,128,848	30,976,773	28,562,105
Income before income taxes	13,590,188	11,029,283	7,404,130
Income tax expense	4,493,410	3,469,847	2,412,386
Net income	$ 9,096,778	$ 7,559,436	$ 4,991,744
Per share information:
Basic net income per share of common stock	$ 0.98	$ 0.89	$ 0.59
Diluted net income per share of common stock	$ 0.81	$ 0.73	$ 0.49
Weighted average shares outstanding:
Basic	9,328,236	8,538,970	8,456,386
Diluted	11,212,026	10,381,895	10,281,044