Loans and the Allowance for Loan Losses (Summary of Activity in Allowance for Loan Losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Financing Receivable, Impaired [Line Items]
Beginning Balance	$ 10,333	$ 10,237
Charge offs	(336)	(6)
Recoveries	11	1
Provision	625	0
Ending Balance	10,633	10,232
Commercial and industrial [Member]
Financing Receivable, Impaired [Line Items]
Beginning Balance	1,698	2,424
Charge offs	(333)	0
Recoveries	0	0
Provision	860	(341)
Ending Balance	2,225	2,083
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Beginning Balance	5,746	5,323
Charge offs	0	0
Recoveries	0	0
Provision	(362)	30
Ending Balance	5,384	5,353
Construction [Member]
Financing Receivable, Impaired [Line Items]
Beginning Balance	362	313
Charge offs	0	0
Recoveries	0	0
Provision	72	(29)
Ending Balance	434	284
Residential mortgage [Member]
Financing Receivable, Impaired [Line Items]
Beginning Balance	990	1,532
Charge offs	0	0
Recoveries	10	0
Provision	4	(154)
Ending Balance	1,004	1,378
Installment [Member]
Financing Receivable, Impaired [Line Items]
Beginning Balance	146	113
Charge offs	(3)	(6)
Recoveries	1	1
Provision	(65)	(5)
Ending Balance	79	103
Unallocated [Member]
Financing Receivable, Impaired [Line Items]
Beginning Balance	1,391	532
Charge offs	0	0
Recoveries	0	0
Provision	116	499
Ending Balance	$ 1,507	$ 1,031