Loans and the Allowance for Loan Losses (Composition of Loan Portfolio) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	$ 902,659	$ 889,549
Net deferred loan costs	163	123
Total loans	902,822	889,672
Commercial and industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	195,507	181,682
Commercial real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	515,914	497,392
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	38,564	40,277
Residential mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	152,236	169,094
Installment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	$ 438	$ 1,104