Loans and Allowance for Loan Losses (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	$ 481,754	$ 458,469
Outstanding consumer loans	205,728	187,480
Owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	181,257	158,790
Non-owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	161,086	165,163
Real estate [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	97,172	86,559
Home equity [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	82,863	77,895
Construction [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	22,898	20,347
Outstanding consumer loans	14,029	13,749
Business [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	116,513	114,169
Other [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	11,664	9,277
Pass [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	433,834	412,896
Outstanding consumer loans	198,301	179,392
Pass [Member] | Owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	170,124	148,255
Pass [Member] | Non-owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	137,625	141,352
Pass [Member] | Real estate [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	93,579	83,173
Pass [Member] | Home equity [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	79,376	73,718
Pass [Member] | Construction [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	19,836	18,265
Outstanding consumer loans	14,029	13,749
Pass [Member] | Business [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	106,249	105,024
Pass [Member] | Other [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	11,317	8,752
Special Mention [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	23,213	19,554
Outstanding consumer loans	4,252	4,767
Special Mention [Member] | Owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	8,698	7,446
Special Mention [Member] | Non-owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	9,315	9,358
Special Mention [Member] | Real estate [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	1,839	2,307
Special Mention [Member] | Home equity [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	2,177	2,290
Special Mention [Member] | Construction [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	1,170
Outstanding consumer loans
Special Mention [Member] | Business [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	4,030	2,750
Special Mention [Member] | Other [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	236	170
Substandard [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	24,707	26,019
Outstanding consumer loans	3,175	3,321
Substandard [Member] | Owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	2,435	3,089
Substandard [Member] | Non-owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	14,146	14,453
Substandard [Member] | Real estate [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	1,754	1,079
Substandard [Member] | Home equity [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	1,310	1,887
Substandard [Member] | Construction [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	1,892	2,082
Outstanding consumer loans
Substandard [Member] | Business [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	6,234	6,395
Substandard [Member] | Other [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	111	355
Doubtful [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Outstanding consumer loans
Doubtful [Member] | Owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Doubtful [Member] | Non-owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Doubtful [Member] | Real estate [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans
Doubtful [Member] | Home equity [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans
Doubtful [Member] | Construction [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Outstanding consumer loans
Doubtful [Member] | Business [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Doubtful [Member] | Other [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans
Loss [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Outstanding consumer loans
Loss [Member] | Owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Loss [Member] | Non-owner occupied RE [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Loss [Member] | Real estate [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans
Loss [Member] | Home equity [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans
Loss [Member] | Construction [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Outstanding consumer loans
Loss [Member] | Business [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Loss [Member] | Other [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans