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Allowance for Loan Losses (Details 4) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	$ 862,515	$ 862,282
Commercial Portfolio Segment [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	609,770	606,727
Commercial And Industrial [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	157,555	158,279
Commercial And Industrial [Member] | Commercial Portfolio Segment [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	157,555	158,279
Commercial Loans Secured By Owner Occupied Real Estate [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	86,934	91,905
Commercial Loans Secured By Owner Occupied Real Estate [Member] | Commercial Portfolio Segment [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	86,934	91,905
Commercial loans secured by non owner occupied real estate [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	365,281	356,543
Commercial loans secured by non owner occupied real estate [Member] | Commercial Portfolio Segment [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	365,281	356,543
Pass [Member] | Commercial Portfolio Segment [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	597,221	591,461
Pass [Member] | Commercial And Industrial [Member] | Commercial Portfolio Segment [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	154,114	154,510
Pass [Member] | Commercial Loans Secured By Owner Occupied Real Estate [Member] | Commercial Portfolio Segment [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	84,301	86,997
Pass [Member] | Commercial loans secured by non owner occupied real estate [Member] | Commercial Portfolio Segment [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	358,806	349,954
Special Mention [Member] | Commercial Portfolio Segment [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	9,469	12,174
Special Mention [Member] | Commercial And Industrial [Member] | Commercial Portfolio Segment [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	1,702	2,089
Special Mention [Member] | Commercial Loans Secured By Owner Occupied Real Estate [Member] | Commercial Portfolio Segment [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	1,496	3,769
Special Mention [Member] | Commercial loans secured by non owner occupied real estate [Member] | Commercial Portfolio Segment [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	6,271	6,316
Substandard [Member] | Commercial Portfolio Segment [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	3,069	3,081
Substandard [Member] | Commercial And Industrial [Member] | Commercial Portfolio Segment [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	1,739	1,680
Substandard [Member] | Commercial Loans Secured By Owner Occupied Real Estate [Member] | Commercial Portfolio Segment [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	1,137	1,139
Substandard [Member] | Commercial loans secured by non owner occupied real estate [Member] | Commercial Portfolio Segment [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	193	262
Doubtful [Member] | Commercial Portfolio Segment [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	11	11
Doubtful [Member] | Commercial And Industrial [Member] | Commercial Portfolio Segment [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	0	0
Doubtful [Member] | Commercial Loans Secured By Owner Occupied Real Estate [Member] | Commercial Portfolio Segment [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	0	0
Doubtful [Member] | Commercial loans secured by non owner occupied real estate [Member] | Commercial Portfolio Segment [Member]
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system
Loan portfolio	$ 11	$ 11

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524

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