Allowances for Loan Losses (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Aging of past due loans
Accruing 30-89 Days Past Due	$ 6,690	$ 7,270
Non Accrual	4,471	5,827	8,068
Accruing Greater Than 90 Days		18
Total Past Due	11,161	13,115
Current Loans	1,100,627	971,377
Total	1,111,788	984,492
Construction and Land Development [Member]
Aging of past due loans
Accruing 30-89 Days Past Due
Non Accrual	1,500	1,500
Accruing Greater Than 90 Days
Total Past Due	1,500	1,500
Current Loans	37,118	55,319
Total	38,618	56,819
Commercial and Industrial [Member]
Aging of past due loans
Accruing 30-89 Days Past Due	1,256	1,417
Non Accrual	676	763
Accruing Greater Than 90 Days		18
Total Past Due	1,932	2,198
Current Loans	86,543	80,206
Total	88,475	82,404
Commercial Real Estate [Member]
Aging of past due loans
Accruing 30-89 Days Past Due	3,450	2,528
Non Accrual	674	736
Accruing Greater Than 90 Days
Total Past Due	4,124	3,264
Current Loans	572,341	484,231
Total	576,465	487,495
Residential Real Estate [Member]
Aging of past due loans
Accruing 30-89 Days Past Due	864	2,635
Non Accrual	1,597	2,324
Accruing Greater Than 90 Days
Total Past Due	2,461	4,959
Current Loans	279,396	234,348
Total	281,857	239,307
Consumer and overdrafts [Member]
Aging of past due loans
Accruing 30-89 Days Past Due	32	519
Non Accrual	24	9
Accruing Greater Than 90 Days
Total Past Due	56	528
Current Loans	7,394	7,153
Total	7,450	7,681
Home equity [Member]
Aging of past due loans
Accruing 30-89 Days Past Due	1,088	171
Non Accrual		495
Accruing Greater Than 90 Days
Total Past Due	1,088	666
Current Loans	117,835	110,120
Total	$ 118,923	$ 110,786