Loans and the Allowance for Loan Losses (Aging Analysis) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	$ 2,123	$ 3,642
60-89 Days Past Due	690	1,331
Greater Than 90 Days	2,561	3,673
Total Past Due	5,374	8,646
Current	897,285	880,903
Total Loans Receivable	902,659	889,549
Loans Receivable >90 Days And Accruing	53	55
Commercial and industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	810	590
60-89 Days Past Due	690	0
Greater Than 90 Days	103	216
Total Past Due	1,603	806
Current	193,904	180,876
Total Loans Receivable	195,507	181,682
Loans Receivable >90 Days And Accruing	0	0
Commercial real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	825	1,012
60-89 Days Past Due	0	703
Greater Than 90 Days	175	354
Total Past Due	1,000	2,069
Current	514,914	495,323
Total Loans Receivable	515,914	497,392
Loans Receivable >90 Days And Accruing	0	0
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
Greater Than 90 Days	0	319
Total Past Due	0	319
Current	38,564	39,958
Total Loans Receivable	38,564	40,277
Loans Receivable >90 Days And Accruing	0	0
Residential mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	480	2,017
60-89 Days Past Due	0	628
Greater Than 90 Days	2,283	2,784
Total Past Due	2,763	5,429
Current	149,473	163,665
Total Loans Receivable	152,236	169,094
Loans Receivable >90 Days And Accruing	53	55
Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	8	23
60-89 Days Past Due	0	0
Greater Than 90 Days	0	0
Total Past Due	8	23
Current	430	1,081
Total Loans Receivable	438	1,104
Loans Receivable >90 Days And Accruing	$ 0	$ 0