Loans and Leases (Total Loans and Leases Outstanding) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	$ 402,033	$ 396,498
Less allowance for credit losses	(7,123)	(6,838)	(6,142)	(6,164)
Net loans and leases	394,910	389,660
Residential mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	25,184	25,835
Less allowance for credit losses	(327)	(306)	(376)	(383)
Commercial mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	236,160	234,202
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	98,065	94,135
Lease financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	31	67
Less allowance for credit losses	(2)	(3)	(7)	(10)
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	42,593	42,259
Less allowance for credit losses	$ (263)	$ (264)	$ (273)	$ (260)