Allowance for Loan Losses (Details 4) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Aging of past due loans
Accruing 30-89 days past due	$ 3,885	$ 7,270
Non accrual	5,458	5,827
Accrual greater than 90 days		18
Total past due	9,343	13,115
Current loans	1,055,580	971,377
Total loans, net	1,064,923	984,492
Construction and Land Development [Member]
Aging of past due loans
Accruing 30-89 days past due
Non accrual	1,500	1,500
Accrual greater than 90 days
Total past due	1,500	1,500
Current loans	36,818	55,319
Total loans, net	38,318	56,819
Commercial and Industrial [Member]
Aging of past due loans
Accruing 30-89 days past due	1,237	1,417
Non accrual	1,268	763
Accrual greater than 90 days		18
Total past due	2,505	2,198
Current loans	76,062	80,206
Total loans, net	78,567	82,404
Commercial Real Estate [Member]
Aging of past due loans
Accruing 30-89 days past due	914	2,528
Non accrual	696	736
Accrual greater than 90 days
Total past due	1,610	3,264
Current loans	560,642	484,231
Total loans, net	562,252	487,495
Residential Real Estate [Member]
Aging of past due loans
Accruing 30-89 days past due	954	2,635
Non accrual	1,890	2,324
Accrual greater than 90 days
Total past due	2,844	4,959
Current loans	259,582	234,348
Total loans, net	262,426	239,307
Consumer and overdrafts [Member]
Aging of past due loans
Accruing 30-89 days past due	16	519
Non accrual	6	9
Accrual greater than 90 days
Total past due	22	528
Current loans	6,639	7,153
Total loans, net	6,661	7,681
Home equity [Member]
Aging of past due loans
Accruing 30-89 days past due	764	171
Non accrual	98	495
Accrual greater than 90 days
Total past due	862	666
Current loans	115,837	110,120
Total loans, net	$ 116,699	$ 110,786