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Allowance for Loan Losses - Present impaired loans by portfolio segment (Details) - USD ($) | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded Investment | $ 2,206,000 | $ 855,000
Related Allowance | 6,000 | 8,000
Unpaid Principal Balance | 2,295,000 | 880,000
Impaired Loans with Specific Allowance |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded Investment | 2,205,000 | 855,000
Related Allowance | 607,000 | 104,000
Impaired Loans With No Specific Allowance |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded Investment | 1,000 | 0
Commercial | Commercial. |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded Investment | 2,200,000 | 847,000
Unpaid Principal Balance | 2,267,000 | 850,000
Commercial | Commercial loans secured by non-owner occupied real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded Investment | 6,000 | 8,000
Unpaid Principal Balance | 28,000 | 30,000
Commercial | Impaired Loans with Specific Allowance | Commercial. |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded Investment | 2,199,000 | 847,000
Related Allowance | 601,000 | 96,000
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 | 6,000 | 8,000
Related Allowance | 6,000 | 8,000
Commercial | Impaired Loans With No Specific Allowance | Commercial. |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded Investment | 1,000 | 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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