Loans and Allowance for Loan Losses (Details 2) - Commercial loans [Member] - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	$ 1,025,535	$ 906,953
Owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	358,169	316,818
Non-owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	355,309	312,798
Construction [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	73,655	51,179
Business [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	238,402	226,158
Pass [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	1,008,964	886,501
Pass [Member] | Owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	354,276	312,628
Pass [Member] | Non-owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	349,819	306,965
Pass [Member] | Construction [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	73,655	51,179
Pass [Member] | Business [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	231,214	215,729
Special mention [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	6,746	9,392
Special mention [Member] | Owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	1,644	1,770
Special mention [Member] | Non-owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	1,523	2,082
Special mention [Member] | Construction [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Special mention [Member] | Business [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	3,579	5,540
Substandard [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	9,825	11,060
Substandard [Member] | Owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	2,249	2,420
Substandard [Member] | Non-owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	3,967	3,751
Substandard [Member] | Construction [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Substandard [Member] | Business [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	3,609	4,889
Doubtful [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Doubtful [Member] | Owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Doubtful [Member] | Non-owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Doubtful [Member] | Construction [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Doubtful [Member] | Business [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans