Loans - Interest Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Income That Would Have Been Recorded Based on Original Term and Rate	$ 68	$ 197	$ 186	$ 491
Interest Income Recorded on a Cash Basis	16	157	19	360
Commercial, financial, and agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Income That Would Have Been Recorded Based on Original Term and Rate	2	51	37	108
Interest Income Recorded on a Cash Basis	14	49	14	132
Real Estate Mortgages | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Income That Would Have Been Recorded Based on Original Term and Rate	14	76	27	142
Interest Income Recorded on a Cash Basis	2	76	2	118
Real Estate Mortgages | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Income That Would Have Been Recorded Based on Original Term and Rate	52	68	116	233
Interest Income Recorded on a Cash Basis	0	30	0	104
Real Estate Mortgages | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Income That Would Have Been Recorded Based on Original Term and Rate	0	1	1	3
Interest Income Recorded on a Cash Basis	0	1	0	3
Consumer automobile loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Income That Would Have Been Recorded Based on Original Term and Rate	0	0	2	3
Interest Income Recorded on a Cash Basis	0	0	3	2
Other consumer installment loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Income That Would Have Been Recorded Based on Original Term and Rate	0	1	3	2
Interest Income Recorded on a Cash Basis	$ 0	$ 1	$ 0	$ 1