Loans (Loans Acquired With Deterioration of Credit Quality) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, acquired with deteriorated credit quality	$ 14,670	$ 15,176
Financing receivable, acquired with deteriorated credit quality, net of deferred income	14,193	14,700
Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, acquired with deteriorated credit quality	2,055	2,145
Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, acquired with deteriorated credit quality	64	74
Residential Real Estate
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, acquired with deteriorated credit quality	12,489	12,873
Consumer
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, acquired with deteriorated credit quality	$ 62	$ 84