Loans and the Allowance for Loan Losses (Composition of Loan Portfolio) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	$ 807,291	$ 755,993
Net deferred loan costs	163	17
Total loans	807,454	756,010
Commercial and industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	168,137	146,711
Commercial real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	448,624	408,164
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	33,521	39,388
Residential mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	156,664	160,771
Installment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	$ 345	$ 959