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Allowance for Loan Losses (Details 4) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
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	$ 891,507	$ 889,633
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	630,389	622,972
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	168,365	159,192
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	91,170	89,935
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	370,854	373,845
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	613,398	606,468
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	166,074	156,448
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	88,419	87,215
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	358,905	362,805
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	13,264	12,328
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	0	500
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	1,605	1,675
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	11,659	10,153
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	3,715	3,633
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	2,291	2,000
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	1,146	759
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	278	874
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	12	543
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	244
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	286
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	$ 12	$ 13

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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
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-Name Accounting Standards Codification
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