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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

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+ References

No definition available.

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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

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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

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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

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