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Premises and Equipment - Summary of Premises and Equipment (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]      
Land $ 684,977 $ 684,977 $ 684,977
Buildings 6,372,495 6,283,741 6,221,980
Equipment and fixtures 5,442,106 5,365,211 5,400,514
Construction in progress 7,364 500 53,197
Property plant and equipment gross 12,506,942 12,334,429 12,360,668
Accumulated depreciation (9,184,075) (8,965,564) (8,689,373)
Property plant and equipment net $ 3,322,867 $ 3,368,865 $ 3,671,295
Buildings | Minimum      
Property, Plant and Equipment [Line Items]      
Useful lives 5 years    
Buildings | Maximum      
Property, Plant and Equipment [Line Items]      
Useful lives 50 years    
Equipment and fixtures | Minimum      
Property, Plant and Equipment [Line Items]      
Useful lives 5 years    
Equipment and fixtures | Maximum      
Property, Plant and Equipment [Line Items]      
Useful lives 30 years