Loans - Average recorded investment in impaired loans (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Construction and land development
With no related allowance recorded
Average Recorded Investment		$ 221
Total
Average Recorded Investment		221
Construction and land development \| Commercial
With no related allowance recorded
Average Recorded Investment		221
Total
Average Recorded Investment		221
Commercial real estate
With no related allowance recorded
Average Recorded Investment	$ 6,835	5,169
Interest Income Recognized	245	213
With an allowance recorded
Average Recorded Investment	67	913
Interest Income Recognized	19	32
Total
Average Recorded Investment	6,902	6,082
Interest Income Recognized	264	245
Commercial real estate \| Owner occupied
With no related allowance recorded
Average Recorded Investment	5,068	3,189
Interest Income Recognized	159	124
With an allowance recorded
Average Recorded Investment	67	913
Interest Income Recognized	19	32
Total
Average Recorded Investment	5,135	4,102
Interest Income Recognized	178	156
Commercial real estate \| Non-owner occupied
With no related allowance recorded
Average Recorded Investment	1,767	1,980
Interest Income Recognized	86	89
Consumer real estate
With no related allowance recorded
Average Recorded Investment	2,798	3,171
Interest Income Recognized	141	135
With an allowance recorded
Average Recorded Investment	149	102
Interest Income Recognized	4	4
Total
Average Recorded Investment	2,947	3,273
Interest Income Recognized	145	139
Consumer real estate \| Non-owner occupied
Total
Average Recorded Investment	1,767	1,980
Interest Income Recognized	86	89
Consumer real estate \| Home equity lines
With no related allowance recorded
Average Recorded Investment	300	300
Interest Income Recognized	25	23
Total
Average Recorded Investment	300	300
Interest Income Recognized	25	23
Consumer real estate \| First deed of trust
With no related allowance recorded
Average Recorded Investment	1,924	2,069
Interest Income Recognized	93	66
With an allowance recorded
Average Recorded Investment	149	76
Interest Income Recognized	4	4
Total
Average Recorded Investment	2,073	2,145
Interest Income Recognized	97	70
Consumer real estate \| Second deed of trust
With no related allowance recorded
Average Recorded Investment	574	802
Interest Income Recognized	23	46
With an allowance recorded
Average Recorded Investment		26
Total
Average Recorded Investment	574	828
Interest Income Recognized	23	46
Commercial and industrial loans
With no related allowance recorded
Average Recorded Investment	9,828	8,712
Interest Income Recognized	387	349
With an allowance recorded
Average Recorded Investment	216	1,144
Interest Income Recognized	23	36
Total
Average Recorded Investment	10,044	9,856
Interest Income Recognized	410	385
Commercial and industrial loans \| Commercial and industrial loans (except those secured by real estate)
With no related allowance recorded
Average Recorded Investment	195	151
Interest Income Recognized	1	1
With an allowance recorded
Average Recorded Investment		129
Total
Average Recorded Investment	195	280
Interest Income Recognized	$ 1	$ 1

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

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=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 http://asc.fasb.org/extlink&oid=123577603&loc=d3e5258-111524

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+ 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=123577603&loc=d3e5258-111524

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-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

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