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Allowance for Loan Losses - Present impaired loans by portfolio segment (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded Investment | $ 867 | $ 824
Related Allowance | 8 | 8
Unpaid Principal Balance | 889 | 846
Impaired Loans with Specific Allowance |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded Investment | 867 | 824
Related Allowance | 106 | 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 | 859 | 816
Unpaid Principal Balance | 859 | 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 | 859 | 816
Related Allowance | 98 | 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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- Definition 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 + Details
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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 + Details
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- Definition 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 + Details
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