Loans - Average Recorded Investment - Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Credit Quality and Related Allowance for Loan Losses
Average Investment in Impaired Loans	$ 12,541	$ 17,935	$ 13,099	$ 17,123
Interest Income Recognized on an Accrual Basis on Impaired Loans	102	128	309	333
Interest Income Recognized on a Cash Basis on Impaired Loans	0	0	0	0
Commercial, financial, and agricultural
Credit Quality and Related Allowance for Loan Losses
Average Investment in Impaired Loans	711	2,052	782	1,458
Interest Income Recognized on an Accrual Basis on Impaired Loans	5	13	15	43
Interest Income Recognized on a Cash Basis on Impaired Loans	0	0	0	0
Real Estate Mortgages \| Residential
Credit Quality and Related Allowance for Loan Losses
Average Investment in Impaired Loans	4,586	5,218	4,765	5,650
Interest Income Recognized on an Accrual Basis on Impaired Loans	47	53	141	151
Interest Income Recognized on a Cash Basis on Impaired Loans	0	0	0	0
Real Estate Mortgages \| Commercial
Credit Quality and Related Allowance for Loan Losses
Average Investment in Impaired Loans	7,227	10,530	7,492	9,848
Interest Income Recognized on an Accrual Basis on Impaired Loans	50	61	151	126
Interest Income Recognized on a Cash Basis on Impaired Loans	0	0	0	0
Real Estate Mortgages \| Construction
Credit Quality and Related Allowance for Loan Losses
Average Investment in Impaired Loans	0	115	42	119
Interest Income Recognized on an Accrual Basis on Impaired Loans	0	1	1	4
Interest Income Recognized on a Cash Basis on Impaired Loans	0	0	0	0
Consumer automobile loans
Credit Quality and Related Allowance for Loan Losses
Average Investment in Impaired Loans	7	0	3	38
Interest Income Recognized on an Accrual Basis on Impaired Loans	0	0	1	0
Interest Income Recognized on a Cash Basis on Impaired Loans	0	0	0	0
Other consumer installment loans
Credit Quality and Related Allowance for Loan Losses
Average Investment in Impaired Loans	10	20	15	10
Interest Income Recognized on an Accrual Basis on Impaired Loans	0	0	0	9
Interest Income Recognized on a Cash Basis on Impaired Loans	$ 0	$ 0	$ 0	$ 0

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5258-111524

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Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

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