Loans Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	$ 16,287	$ 15,625	$ 16,038	$ 15,570
Charge-offs	(200)	(165)	(417)	(456)
Recoveries	42	44	107	114
Provision	(669)	(70)	(1,070)	(346)
Allowance for Loan Losses, Ending Balance	16,798	15,574	16,798	15,574
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	250	144	250	144	$ 0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	16,548	15,430	16,548	15,430	16,038
Ending Loan Balance - Individually Evaluated for Impairment	4,275	4,307	4,275	4,307	3,286
Ending Loan Balance - Collectively Evaluated for Impairment	1,668,215	1,475,363	1,668,215	1,475,363	1,570,666
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	1,437	2,163	1,827	2,100
Charge-offs	(11)	(16)	(52)	(32)
Recoveries	2	12	15	19
Provision	(300)	344	(662)	272
Allowance for Loan Losses, Ending Balance	1,128	1,815	1,128	1,815
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	1,128	1,815	1,128	1,815	1,827
Ending Loan Balance - Individually Evaluated for Impairment	0	432	0	432	155
Ending Loan Balance - Collectively Evaluated for Impairment	106,651	94,901	106,651	94,901	102,432
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	4,950	3,833	4,520	4,128
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	(866)	(99)	1,296	196
Allowance for Loan Losses, Ending Balance	5,816	3,932	5,816	3,932
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	250	0	250	0	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	5,566	3,932	5,566	3,932	4,520
Ending Loan Balance - Individually Evaluated for Impairment	3,542	1,491	3,542	1,491	2,372
Ending Loan Balance - Collectively Evaluated for Impairment	414,070	352,304	414,070	352,304	382,567
Consumer Loans Financing [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	5,912	5,267	5,554	5,210
Charge-offs	(189)	(147)	(349)	(332)
Recoveries	40	32	92	95
Provision	21	(264)	(445)	(443)
Allowance for Loan Losses, Ending Balance	5,742	5,416	5,742	5,416
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	5,742	5,416	5,742	5,416	5,554
Ending Loan Balance - Individually Evaluated for Impairment	93	93	93	93	114
Ending Loan Balance - Collectively Evaluated for Impairment	508,445	454,786	508,445	454,786	464,409
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	3,798	3,629	3,790	3,369
Charge-offs	0	(2)	(16)	(92)
Recoveries	0	0	0	0
Provision	(228)	(72)	(252)	(422)
Allowance for Loan Losses, Ending Balance	4,026	3,699	4,026	3,699
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	0	144	0	144	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	4,026	3,555	4,026	3,555	3,790
Ending Loan Balance - Individually Evaluated for Impairment	640	2,291	640	2,291	645
Ending Loan Balance - Collectively Evaluated for Impairment	639,049	573,372	639,049	573,372	621,258
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	190	733	347	763
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	(104)	(21)	(261)	(51)
Allowance for Loan Losses, Ending Balance	86	712	86	712
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	86	712	86	712	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

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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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