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Loans and Allowance for Loan Losses (Details 6) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Summary of nonperforming assets
Nonaccruing troubled debt restructurings	$ 2,673	$ 990
Total nonaccrual loans, including nonaccruing TDRs	7,301	5,482
Other real estate owned	242	639	$ 2,475
Total nonperforming assets	$ 7,543	$ 6,121
Nonperforming assets as a percentage of:
Total assets	0.46%	0.46%
Gross loans	0.54%	0.53%
Total loans over 90 days past due	$ 2,027	$ 1,984
Loans over 90 days past due and still accruing
Accruing TDRs	5,145	5,675
Commercial [Member] | Construction [Member]
Summary of nonperforming assets
Nonaccruing troubled debt restructurings
Commercial [Member] | Owner occupied RE [Member]
Summary of nonperforming assets
Nonaccruing troubled debt restructurings		276
Commercial [Member] | Non-owner occupied RE [Member]
Summary of nonperforming assets
Nonaccruing troubled debt restructurings	1,581	2,711
Commercial [Member] | Business [Member]
Summary of nonperforming assets
Nonaccruing troubled debt restructurings	910	686
Consumer [Member] | Real estate [Member]
Summary of nonperforming assets
Nonaccruing troubled debt restructurings	992	550
Consumer [Member] | Home equity [Member]
Summary of nonperforming assets
Nonaccruing troubled debt restructurings	1,144	256
Consumer [Member] | Construction [Member]
Summary of nonperforming assets
Nonaccruing troubled debt restructurings
Consumer [Member] | Other [Member]
Summary of nonperforming assets
Nonaccruing troubled debt restructurings	$ 1	$ 13

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Total nonperforming assets consist of nonaccrual loans and other Real Estate.

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Recorded investment in financing receivables that are 90 days or more past due and still accruing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (d)
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Carrying amount of other real estate not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. This does not include real estate assets taken in settlement of troubled loans through surrender or foreclosure.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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