Loans and Allowance for Loan Losses - Schedule of Troubled Debt Restructuring by Loan Class (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Troubled Debt Restructuring	$ 4,243	$ 914,378
Current [Member]
Troubled Debt Restructuring	4,243	914,378
Default [Member]
Troubled Debt Restructuring	0	0
Accruing [Member]
Troubled Debt Restructuring	4,243	914,378
Non-accruing [Member]
Troubled Debt Restructuring	0	0
Commercial, Financial and Agricultural Loans [Member] | Current [Member]
Troubled Debt Restructuring	0	0
Commercial, Financial and Agricultural Loans [Member] | Default [Member]
Troubled Debt Restructuring	0	0
Commercial, Financial and Agricultural Loans [Member] | Accruing [Member]
Troubled Debt Restructuring	0	0
Commercial, Financial and Agricultural Loans [Member] | Non-accruing [Member]
Troubled Debt Restructuring	0	0
Construction Loans [Member] | Current [Member]
Troubled Debt Restructuring	0	0
Construction Loans [Member] | Default [Member]
Troubled Debt Restructuring	0	0
Construction Loans [Member] | Accruing [Member]
Troubled Debt Restructuring	0	0
Construction Loans [Member] | Non-accruing [Member]
Troubled Debt Restructuring	0	0
Commercial Mortgage Loans [Member] | Current [Member]
Troubled Debt Restructuring	0	0
Commercial Mortgage Loans [Member] | Default [Member]
Troubled Debt Restructuring	0	0
Commercial Mortgage Loans [Member] | Accruing [Member]
Troubled Debt Restructuring	0	0
Commercial Mortgage Loans [Member] | Non-accruing [Member]
Troubled Debt Restructuring	0	0
Residential Loans [Member] | Current [Member]
Troubled Debt Restructuring	3,397	4,853
Residential Loans [Member] | Default [Member]
Troubled Debt Restructuring	0	0
Residential Loans [Member] | Accruing [Member]
Troubled Debt Restructuring	3,397	4,853
Residential Loans [Member] | Non-accruing [Member]
Troubled Debt Restructuring	0	0
Agricultural Loans [Member] | Current [Member]
Troubled Debt Restructuring	0	906,279
Agricultural Loans [Member] | Default [Member]
Troubled Debt Restructuring	0	0
Agricultural Loans [Member] | Accruing [Member]
Troubled Debt Restructuring	0	906,279
Agricultural Loans [Member] | Non-accruing [Member]
Troubled Debt Restructuring	0	0
Consumer and Other Loans [Member] | Current [Member]
Troubled Debt Restructuring	846	3,246
Consumer and Other Loans [Member] | Default [Member]
Troubled Debt Restructuring	0	0
Consumer and Other Loans [Member] | Accruing [Member]
Troubled Debt Restructuring	846	3,246
Consumer and Other Loans [Member] | Non-accruing [Member]
Troubled Debt Restructuring	$ 0	$ 0