Loans and the Allowance for Loan Losses (Aging Analysis) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	$ 1,927	$ 3,642
60-89 Days Past Due		1,331
Greater Than 90 Days	2,620	3,671
Total Past Due	4,547	8,644
Current	874,706	880,905
Total Loans Receivable	879,253	889,549
Loans Receivable >90 Days And Accruing	55	55
Commercial and industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	7	590
Greater Than 90 Days	212	214
Total Past Due	219	804
Current	186,962	180,878
Total Loans Receivable	187,181	181,682
Commercial real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	780	1,012
60-89 Days Past Due		703
Greater Than 90 Days	354	354
Total Past Due	1,134	2,069
Current	500,429	495,323
Total Loans Receivable	501,563	497,392
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Greater Than 90 Days		319
Total Past Due		319
Current	35,163	39,958
Total Loans Receivable	35,163	40,277
Residential mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	1,136	2,017
60-89 Days Past Due		628
Greater Than 90 Days	2,054	2,784
Total Past Due	3,190	5,429
Current	151,567	163,665
Total Loans Receivable	154,757	169,094
Loans Receivable >90 Days And Accruing	55	55
Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	4	23
Total Past Due	4	23
Current	585	1,081
Total Loans Receivable	$ 589	$ 1,104