Loans and the Allowance for Loan Losses (Aging Analysis) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	$ 2,939	$ 3,642
60-89 Days Past Due	5,358	1,331
Greater Than 90 Days	2,032	3,673
Total Past Due	10,329	8,646
Current	947,007	880,903
Total Loans Receivable	957,336	889,549
Loans Receivable >90 Days And Accruing	0	55
Commercial and industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	739	590
60-89 Days Past Due	4,567	0
Greater Than 90 Days	85	216
Total Past Due	5,391	806
Current	223,821	180,876
Total Loans Receivable	229,212	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	872	1,012
60-89 Days Past Due	752	703
Greater Than 90 Days	175	354
Total Past Due	1,799	2,069
Current	529,875	495,323
Total Loans Receivable	531,674	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	42,727	39,958
Total Loans Receivable	42,727	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	1,326	2,017
60-89 Days Past Due	39	628
Greater Than 90 Days	1,772	2,784
Total Past Due	3,137	5,429
Current	149,797	163,665
Total Loans Receivable	152,934	169,094
Loans Receivable >90 Days And Accruing	0	55
Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	2	23
60-89 Days Past Due	0	0
Greater Than 90 Days	0	0
Total Past Due	2	23
Current	787	1,081
Total Loans Receivable	789	1,104
Loans Receivable >90 Days And Accruing	$ 0	$ 0