Loans and Allowance for Loan Losses (Details 10) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Allowance for loan losses and recorded investment in loans by impairment methodology
Allowance for loan losses, Individually evaluated	$ 3,723	$ 3,677
Recorded investment in loans, Individually evaluated	12,922	12,446
Allowance for loan losses, Collectively evaluated	12,129	11,846
Recorded investment in loans, Collectively evaluated	1,446,460	1,374,624
Allowance for loan losses, Total	15,852	15,523	$ 15,287	$ 14,855
Recorded investment in loans, Total	1,459,382	1,387,070
Commercial [Member]
Allowance for loan losses and recorded investment in loans by impairment methodology
Allowance for loan losses, Individually evaluated	1,852	1,990
Recorded investment in loans, Individually evaluated	7,807	8,664
Allowance for loan losses, Collectively evaluated	8,162	7,947
Recorded investment in loans, Collectively evaluated	961,898	898,289
Allowance for loan losses, Total	10,014	9,937
Recorded investment in loans, Total	969,705	906,953
Consumer [Member]
Allowance for loan losses and recorded investment in loans by impairment methodology
Allowance for loan losses, Individually evaluated	1,871	1,687
Recorded investment in loans, Individually evaluated	5,115	3,782
Allowance for loan losses, Collectively evaluated	3,967	3,899
Recorded investment in loans, Collectively evaluated	484,562	476,335
Allowance for loan losses, Total	5,838	5,586
Recorded investment in loans, Total	$ 489,677	$ 480,117

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A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
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- Definition

The balance of financing receivables that were collectively evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
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The balance of financing receivables that were individually evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
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-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

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