Premises and Equipment Net - Components of Premises and Equipment Included in Balance Sheets (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Premises and equipment	$ 22,644,774	$ 23,604,139
Less accumulated depreciation	(12,024,232)	(11,992,451)
Premises and equipment, net	10,620,542	11,611,688
Land and Improvements
Property, Plant and Equipment [Line Items]
Premises and equipment	1,998,623	2,085,769
Buildings and Improvements
Property, Plant and Equipment [Line Items]
Premises and equipment	11,764,356	12,544,293
Furniture and Equipment
Property, Plant and Equipment [Line Items]
Premises and equipment	$ 8,881,795	$ 8,974,077