Loans and Allowance for Loan Losses (Details 7) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Summary of activity related to our allowance for loan losses
Balance, beginning of period	$ 11,752	$ 10,213
Provision for loan losses	625	1,000
Loan charge-offs	(145)	(512)
Loan recoveries	9	12
Net loan charge-offs	(136)	(500)
Balance, end of period	12,241	10,713
Net charge-offs to average loans (annualized)	0.06%	0.27%
Allowance for loan losses to gross loans	1.35%	1.38%
Allowance for loan losses to nonperforming loans	187.61%	120.99%
Commercial [Member] \| Owner occupied RE [Member]
Summary of activity related to our allowance for loan losses
Balance, beginning of period	1,645	1,880
Provision for loan losses	259	13
Loan charge-offs
Loan recoveries
Net loan charge-offs
Balance, end of period	1,904	1,893
Commercial [Member] \| Non-owner occupied RE [Member]
Summary of activity related to our allowance for loan losses
Balance, beginning of period	2,332	2,633
Provision for loan losses	295	780
Loan charge-offs	(78)	(434)
Loan recoveries	2
Net loan charge-offs	(76)	(434)
Balance, end of period	2,551	2,979
Commercial [Member] \| Construction [Member]
Summary of activity related to our allowance for loan losses
Balance, beginning of period	614	397
Provision for loan losses	(149)	4
Loan charge-offs
Loan recoveries
Net loan charge-offs
Balance, end of period	465	401
Commercial [Member] \| Business [Member]
Summary of activity related to our allowance for loan losses
Balance, beginning of period	3,625	3,329
Provision for loan losses	183	43
Loan charge-offs	(66)
Loan recoveries	7	11
Net loan charge-offs	(59)	11
Balance, end of period	3,749	3,383
Consumer [Member] \| Real estate [Member]
Summary of activity related to our allowance for loan losses
Balance, beginning of period	1,714	1,091
Provision for loan losses	109	151
Loan charge-offs
Loan recoveries
Net loan charge-offs
Balance, end of period	1,823	1,242
Consumer [Member] \| Home equity [Member]
Summary of activity related to our allowance for loan losses
Balance, beginning of period	1,162	644
Provision for loan losses		82
Loan charge-offs		(76)
Loan recoveries		1
Net loan charge-offs		(75)
Balance, end of period	1,162	651
Consumer [Member] \| Construction [Member]
Summary of activity related to our allowance for loan losses
Balance, beginning of period	236	99
Provision for loan losses	15	5
Loan charge-offs
Loan recoveries
Net loan charge-offs
Balance, end of period	251	104
Consumer [Member] \| Other [Member]
Summary of activity related to our allowance for loan losses
Balance, beginning of period	424	140
Provision for loan losses	(87)	(78)
Loan charge-offs	(1)	(2)
Loan recoveries
Net loan charge-offs	(1)	(2)
Balance, end of period	$ 336	$ 60

Allowance for loan and lease losses write offs net of recoveries.

No definition available.

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- Definition

Allowance for loan losses as a percentage of gross loans.

+ References

No definition available.

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- Definition

Allowance for credit losses as a percentage of nonperforming loans.

+ References

No definition available.

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- Definition

Net loan charge offs annualized as a percentage of average total loans.

+ References

No definition available.

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- Definition

Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.7(d))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(3)

-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524

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- Definition

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=49124121&loc=SL6953423-111524

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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 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524

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- Definition

Total of recoveries of amounts due the Entity that had previously been written off as uncollectible using allowances (the valuation accounts that are netted against the cost of an asset to value it at its carrying value) and total of reestablishments of reserves (liabilities established to represent expected future costs) that had previously been utilized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

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