Loans - Loans Portfolio by Internal Risk Grading (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 982,905	$ 840,925	[1]
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	159,015	126,981
Commercial Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	66,543	50,863
Commercial Real Estate Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	432,315	391,472
Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	220,778	175,293
Home equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	97,866	91,075
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	6,388	5,241
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans		125,405
Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	156,136
Pass [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	60,595	45,534
Pass [Member] | Commercial Real Estate Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	418,858	382,607
Pass [Member] | Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	198,952	165,367
Pass [Member] | Home equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	95,341	88,646
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans		1,569
Special Mention [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,606
Special Mention [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,363	569
Special Mention [Member] | Commercial Real Estate Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	7,103	4,889
Special Mention [Member] | Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	17,570	6,709
Special Mention [Member] | Home equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,478	1,801
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans		7
Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	273
Substandard [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,585	4,760
Substandard [Member] | Commercial Real Estate Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	6,354	3,976
Substandard [Member] | Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	4,256	3,217
Substandard [Member] | Home equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,047	628
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans		0
Doubtful [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0
Doubtful [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Doubtful [Member] | Commercial Real Estate Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Doubtful [Member] | Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Doubtful [Member] | Home equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	6,337	5,240
Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 51	$ 1

[1] Derived from audited consolidated financial statements.