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Allowance for Loan Losses - Present impaired loans by portfolio segment (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	$ 826	$ 824
Related Allowance	8	8
Unpaid Principal Balance	848	846
Impaired Loans with Specific Allowance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	826	824
Related Allowance	86	92
Impaired Loans With No Specific Allowance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	0	0
Commercial | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	818	816
Unpaid Principal Balance	818	816
Commercial | Commercial loans secured by non-owner occupied real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	8	8
Unpaid Principal Balance	30	30
Commercial | Impaired Loans with Specific Allowance | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	818	816
Related Allowance	78	84
Commercial | Impaired Loans with Specific Allowance | Commercial loans secured by non-owner occupied real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	8	8
Related Allowance	8	8
Commercial | Impaired Loans With No Specific Allowance | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	0	0
Commercial | Impaired Loans With No Specific Allowance | Commercial loans secured by non-owner occupied real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	$ 0	$ 0

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+ References

No definition available.

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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 14A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953550-111524

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- Definition

Amount of allowance for credit losses related to recorded investment.

+ 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 (a)(3)
-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524

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Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without 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 (a)(4)
-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524

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