Loans and Allowance for Loan Losses - Average Recorded Investment and Interest Income (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	$ 12,024	$ 2,447	$ 12,352	$ 4,769
With no related allowance recorded, Interest Recognized For The Period Ended	18	145	52	158
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	23,274	5,626	23,476	5,157
With an allowance recorded, Interest Recognized For The Period Ended	28	24	69	84
Total average recorded investment	35,298	8,073	35,828	9,926
Total interest income recognized For the Period Ended	46	169	121	242
Commercial, financial, and agricultural
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	1,517	172	1,703	1,612
With no related allowance recorded, Interest Recognized For The Period Ended	18	128	31	128
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	5,295	1,359	5,409	1,237
With an allowance recorded, Interest Recognized For The Period Ended	5	8	19	27
Residential real estate \| Construction
With an allowance recorded:
With an allowance recorded, Average Recorded Investment			63	0
With an allowance recorded, Interest Recognized For The Period Ended			0	0
Residential real estate \| Mortgages
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	1,131	1,414	1,238	2,101
With no related allowance recorded, Interest Recognized For The Period Ended		17	21	17
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	1,713	2,412	1,691	2,360
With an allowance recorded, Interest Recognized For The Period Ended	16		26	36
Commercial real estate \| Construction
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	0	0	0	179
With no related allowance recorded, Interest Recognized For The Period Ended	0	0	0	0
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	109	609	139	461
With an allowance recorded, Interest Recognized For The Period Ended			0	0
Commercial real estate \| Mortgages
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	9,376	861	9,411	870
With no related allowance recorded, Interest Recognized For The Period Ended			0	13
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	16,102	1,133	16,111	984
With an allowance recorded, Interest Recognized For The Period Ended	7	8	21	14
Installment and other consumer
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	0	0	0	7
With no related allowance recorded, Interest Recognized For The Period Ended	0	0	0	0
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	$ 55	113	63	115
With an allowance recorded, Interest Recognized For The Period Ended		$ 8	$ 3	$ 7

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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

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-Publisher FASB
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-Topic 310
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-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=121611835&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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-Publisher FASB
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-Topic 310
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524

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