Loans (Carrying Amount of Loans with Deterioration of Credit Quality) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Loans Acquired with Deteriorated Credit Quality	$ 10,477	$ 11,174
Carrying amount, Net of Allowance	10,397	11,086
Commercial and Industrial Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Acquired with Deteriorated Credit Quality	2,049	1,840
Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Acquired with Deteriorated Credit Quality	8,135	9,037
Home Equity Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Acquired with Deteriorated Credit Quality	0	0
Consumer Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Acquired with Deteriorated Credit Quality	144	148
Residential Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Acquired with Deteriorated Credit Quality	$ 149	$ 149