Composition of Net Loans (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real estate loans	$ 321,796,000	$ 307,716,000
Business loans	42,111,000	57,121,000
Consumer loans	26,488,000	27,831,000
Total Gross Loans	390,395,000	392,668,000
Unearned income	(561,000)	(485,000)
Allowance for loan losses	8,361,572	8,077,499	6,834,575	6,954,269
Loans, net	381,472,367	384,104,766
Land Development and Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real estate loans	31,062,000	27,224,000
Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real estate loans	30,097,000	29,634,000
1-4 Family Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real estate loans	102,413,000	105,489,000
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real estate loans	158,224,000	145,369,000
Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Business loans	40,971,000	55,813,000
Farm Production and Other Farm Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Business loans	1,140,000	1,308,000
Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans	988,000	1,087,000
Other Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans	$ 25,500,000	$ 26,744,000