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Allowance for Loan Losses - Present impaired loans by portfolio segment (Details) - USD ($) | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded Investment | $ 829,000 | $ 11,000
Related Allowance | 96,000 | 11,000
Unpaid Principal Balance | 851,000 | 33,000
Commercial [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded Investment | 820,000 |
Unpaid Principal Balance | 820,000 |
Commercial Loans Secured by Nonowner Occupied Real Estate[Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded Investment | 9,000 | 11,000
Unpaid Principal Balance | 31,000 | 33,000
Impaired Loans with Specific Allowance [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded Investment | 829,000 | 11,000
Related Allowance | 96,000 | 11,000
Impaired Loans with Specific Allowance [Member] | Commercial [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded Investment | 820,000 |
Related Allowance | 87,000 |
Impaired Loans with Specific Allowance [Member] | Commercial Loans Secured by Nonowner Occupied Real Estate[Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded Investment | 9,000 | 11,000
Related Allowance | 9,000 | 11,000
Impaired Loans With No Specific Allowance [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded Investment | 0 | 0
Impaired Loans With No Specific Allowance [Member] | Commercial [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded Investment | 0 |
Impaired Loans With No Specific Allowance [Member] | Commercial Loans Secured by Nonowner Occupied Real Estate[Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded Investment | $ 0 | $ 0

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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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=118936363&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=118936363&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=118936363&loc=d3e5212-111524 + Details
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