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Loans and allowance for loan losses (Loans On Non-Accrual Status) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables on Non-Accrual Status	$ 954	$ 2,063
Commercial [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables on Non-Accrual Status	25	121
Commercial Real Estate [Member] | Commercial Mortgages-Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables on Non-Accrual Status	501	940
Commercial Real Estate [Member] | Commercial Mortgages-Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables on Non-Accrual Status	138	552
Consumer [Member] | Consumer Secured [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables on Non-Accrual Status	127	240
Residential [Member] | Residential Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables on Non-Accrual Status	$ 163	$ 210

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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 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5111-111524

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (3)

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (2)

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