Loans Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	$ 16,798	$ 15,574	$ 16,038	$ 15,570
Charge-offs	(367)	(380)	(784)	(835)
Recoveries	64	43	171	157
Provision	480	537	1,550	882
Allowance for Loan Losses, Ending Balance	16,975	15,774	16,975	15,774
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	240	135	240	135	$ 0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	16,735	15,639	16,735	15,639	16,038
Ending Loan Balance - Individually Evaluated for Impairment	3,945	4,176	3,945	4,176	3,286
Ending Loan Balance - Collectively Evaluated for Impairment	1,703,271	1,532,749	1,703,271	1,532,749	1,570,666
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	1,128	1,815	1,827	2,100
Charge-offs	(34)	(15)	(86)	(46)
Recoveries	5	5	20	23
Provision	(76)	16	(738)	(256)
Allowance for Loan Losses, Ending Balance	1,023	1,821	1,023	1,821
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	0	0	0	0	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	1,023	1,821	1,023	1,821	1,827
Ending Loan Balance - Individually Evaluated for Impairment	0	164	0	164	155
Ending Loan Balance - Collectively Evaluated for Impairment	103,054	102,725	103,054	102,725	102,432
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	5,816	3,932	4,520	4,128
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	(75)	100	1,221	(96)
Allowance for Loan Losses, Ending Balance	5,741	4,032	5,741	4,032
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	240	0	240	0	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	5,501	4,032	5,501	4,032	4,520
Ending Loan Balance - Individually Evaluated for Impairment	3,538	2,371	3,538	2,371	2,372
Ending Loan Balance - Collectively Evaluated for Impairment	425,473	371,301	425,473	371,301	382,567
Consumer Loans Financing [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	5,742	5,416	5,554	5,210
Charge-offs	(243)	(150)	(591)	(483)
Recoveries	59	38	150	134
Provision	513	225	958	668
Allowance for Loan Losses, Ending Balance	6,071	5,529	6,071	5,529
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	0	0	0	0	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	6,071	5,529	6,071	5,529	5,554
Ending Loan Balance - Individually Evaluated for Impairment	90	130	90	130	114
Ending Loan Balance - Collectively Evaluated for Impairment	523,613	458,790	523,613	458,790	464,409
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	4,026	3,699	3,790	3,369
Charge-offs	(90)	(215)	(107)	(306)
Recoveries	0	0	1	0
Provision	166	311	418	732
Allowance for Loan Losses, Ending Balance	4,102	3,795	4,102	3,795
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	0	135	0	135	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	4,102	3,660	4,102	3,660	3,790
Ending Loan Balance - Individually Evaluated for Impairment	317	1,511	317	1,511	645
Ending Loan Balance - Collectively Evaluated for Impairment	651,131	599,933	651,131	599,933	621,258
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	86	712	347	763
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	(48)	(115)	(309)	(166)
Allowance for Loan Losses, Ending Balance	38	597	38	597
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	0	0	0	0	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	38	597	38	597	347
Ending Loan Balance - Individually Evaluated for Impairment	0	0	0	0	0
Ending Loan Balance - Collectively Evaluated for Impairment	$ 0	$ 0	$ 0	$ 0	$ 0

No definition available.

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

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

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

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Amount of recovery of financing receivables doubtful of collection that were previously charged off.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of direct write-downs of financing receivables charged against the allowance.

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

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

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- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

+ 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)(2)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

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