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Allowance for Loan Losses - Present impaired loans by portfolio segment (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded Investment | $ 2,582 | $ 855
Related Allowance | 8 |
Unpaid Principal Balance | 2,607 | 880
Impaired Loans with Specific Allowance |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded Investment | 2,582 | 855
Related Allowance | 480 | 104
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 | 2,574 | 847
Unpaid Principal Balance | 2,577 | 850
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 | 2,574 | 847
Related Allowance | 472 | 96
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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