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Allowance for Loan Losses (Details 6) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Current	$ 872,919	$ 879,558
Total Past Due	10,414	10,075
Total loans	883,333	889,633
90 Days Past Due and Still Accruing	0	0
30-59 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total Past Due	8,632	7,687
60-89 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total Past Due	1,088	1,250
90 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total Past Due	694	1,138
Commercial and Industrial [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Current	159,451	159,181
Total Past Due	6,071	11
Total loans	165,522	159,192
90 Days Past Due and Still Accruing	0	0
Commercial and Industrial [Member] | 30-59 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total Past Due	6,071	0
Commercial and Industrial [Member] | 60-89 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total Past Due	0	0
Commercial and Industrial [Member] | 90 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total Past Due	0	11
Commercial loans secured by owner occupied real estate [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Current	95,594	89,649
Total Past Due	0	286
Total loans	95,594	89,935
90 Days Past Due and Still Accruing	0	0
Commercial loans secured by owner occupied real estate [Member] | 30-59 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total Past Due	0	0
Commercial loans secured by owner occupied real estate [Member] | 60-89 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total Past Due	0	0
Commercial loans secured by owner occupied real estate [Member] | 90 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total Past Due	0	286
Commercial loans secured by non-owner occupied real estate [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Current	363,532	368,073
Total Past Due	0	5,772
Total loans	363,532	373,845
90 Days Past Due and Still Accruing	0	0
Commercial loans secured by non-owner occupied real estate [Member] | 30-59 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total Past Due	0	5,238
Commercial loans secured by non-owner occupied real estate [Member] | 60-89 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total Past Due	0	534
Commercial loans secured by non-owner occupied real estate [Member] | 90 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total Past Due	0	0
Real estate – residential mortgage [member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Current	236,331	243,393
Total Past Due	4,260	3,885
Total loans	240,591	247,278
90 Days Past Due and Still Accruing	0	0
Real estate – residential mortgage [member] | 30-59 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total Past Due	2,505	2,373
Real estate – residential mortgage [member] | 60-89 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total Past Due	1,061	671
Real estate – residential mortgage [member] | 90 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total Past Due	694	841
Consumer [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Current	18,011	19,262
Total Past Due	83	121
Total loans	18,094	19,383
90 Days Past Due and Still Accruing	0	0
Consumer [Member] | 30-59 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total Past Due	56	76
Consumer [Member] | 60-89 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total Past Due	27	45
Consumer [Member] | 90 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total Past Due	$ 0	$ 0

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