Loans, Credit exposure (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 816,588	$ 794,671
Threshold limit to consider loan as nonperforming	90 days
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	126,437	122,553
Commercial Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	47,060	41,822
Commercial Real Estate Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	371,743	364,616
Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	175,091	171,917
Home equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	90,952	87,797
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	5,305	5,966
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	124,768	121,033
Pass [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	41,573	35,563
Pass [Member] | Commercial Real Estate Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	361,955	351,801
Pass [Member] | Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	164,460	158,478
Pass [Member] | Home equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	88,773	85,163
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,659	1,500
Special Mention [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	624	1,005
Special Mention [Member] | Commercial Real Estate Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	5,400	6,795
Special Mention [Member] | Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	7,484	8,242
Special Mention [Member] | Home equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,624	1,650
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	10	20
Substandard [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	4,863	5,254
Substandard [Member] | Commercial Real Estate Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	4,388	6,020
Substandard [Member] | Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,147	5,197
Substandard [Member] | Home equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	555	984
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	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	5,303	5,966
Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 2	$ 0