Loans and the Allowance for Loan Losses (Composition of Loan Portfolio) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	$ 957,336	$ 889,549
Net deferred loan costs	156	123
Total loans	957,492	889,672
Commercial and industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	229,212	181,682
Commercial real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	531,674	497,392
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	42,727	40,277
Residential mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	152,934	169,094
Installment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	$ 789	$ 1,104