Loans and Allowance for Loan Losses - Average Recorded Investment and Interest Income (Details) - USD ($)	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	$ 12,623,000	$ 3,997,000
With no related allowance recorded, Interest Recognized For The Period Ended	17,000	6,000
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	24,323,000	4,232,000
With an allowance recorded, Interest Recognized For The Period Ended	23,000	36,000
Total average recorded investment	36,946,000	8,229,000
Total interest income recognized For the Period Ended	40,000	42,000
Commercial, financial, and agricultural
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	1,742,000	1,014,000
With no related allowance recorded, Interest Recognized For The Period Ended	8,000	0
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	5,696,000	1,195,000
With an allowance recorded, Interest Recognized For The Period Ended	7,000	8,000
Residential real estate
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	1,424,000	1,581,000
With no related allowance recorded, Interest Recognized For The Period Ended	9,000	0
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	1,958,000	2,550,000
With an allowance recorded, Interest Recognized For The Period Ended	6,000	20,000
Residential real estate \| Construction
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	190,000	0
With an allowance recorded, Interest Recognized For The Period Ended	0	0
Commercial real estate
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	9,457,000	1,163,000
With no related allowance recorded, Interest Recognized For The Period Ended	0	6,000
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	16,195,000	370,000
With an allowance recorded, Interest Recognized For The Period Ended	7,000	2,000
Commercial real estate \| Construction
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	0	227,000
With no related allowance recorded, Interest Recognized For The Period Ended	0	0
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	199,000	0
With an allowance recorded, Interest Recognized For The Period Ended	0	0
Installment and other consumer
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	0	12,000
With no related allowance recorded, Interest Recognized For The Period Ended	0	0
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	85,000	117,000
With an allowance recorded, Interest Recognized For The Period Ended	$ 3,000	$ 6,000

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+ References

No definition available.

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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 http://asc.fasb.org/extlink&oid=121611835&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 http://asc.fasb.org/extlink&oid=121611835&loc=d3e5258-111524

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- Definition

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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Amount of average investment of impaired financing receivables for which there is no 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 17
-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5258-111524

Reference 2: 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 http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524

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