Loans (Credit Quality Indicators - Residential, Consumer) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Residential Mortgage [Member] | Under 90 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	$ 714,023	$ 694,131
Residential Mortgage [Member] | Under 90 Days Past Due [Member] | Accruing Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	686,640	667,968
Residential Mortgage [Member] | Under 90 Days Past Due [Member] | Nonaccrual Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	2,500	4,331
Residential Mortgage [Member] | Under 90 Days Past Due [Member] | Homeowner Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	24,883	21,832
Residential Mortgage [Member] | Over 90 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	3,658	6,283
Residential Mortgage [Member] | Over 90 Days Past Due [Member] | Accruing Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	0	0
Residential Mortgage [Member] | Over 90 Days Past Due [Member] | Nonaccrual Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	3,658	6,283
Residential Mortgage [Member] | Over 90 Days Past Due [Member] | Homeowner Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	0	0
Consumer Segment [Member] | Under 90 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	323,059	321,243
Consumer Segment [Member] | Under 90 Days Past Due [Member] | Home Equity Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	226,333	222,905
Consumer Segment [Member] | Under 90 Days Past Due [Member] | Home Equity Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	39,078	42,919
Consumer Segment [Member] | Under 90 Days Past Due [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	57,648	55,419
Consumer Segment [Member] | Over 90 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	844	874
Consumer Segment [Member] | Over 90 Days Past Due [Member] | Home Equity Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	528	525
Consumer Segment [Member] | Over 90 Days Past Due [Member] | Home Equity Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	251	202
Consumer Segment [Member] | Over 90 Days Past Due [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	$ 65	$ 147