Loans (Credit Quality Indicators - Residential, Consumer) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Residential Mortgage [Member] | Under 90 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	$ 720,034	$ 714,023
Residential Mortgage [Member] | Under 90 Days Past Due [Member] | Accruing Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	695,719	686,640
Residential Mortgage [Member] | Under 90 Days Past Due [Member] | Nonaccrual Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	2,372	2,500
Residential Mortgage [Member] | Under 90 Days Past Due [Member] | Homeowner Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	21,943	24,883
Residential Mortgage [Member] | Over 90 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	4,327	3,658
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	4,327	3,658
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	323,053	323,059
Consumer Segment [Member] | Under 90 Days Past Due [Member] | Home Equity Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	226,450	226,333
Consumer Segment [Member] | Under 90 Days Past Due [Member] | Home Equity Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	39,891	39,078
Consumer Segment [Member] | Under 90 Days Past Due [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	56,712	57,648
Consumer Segment [Member] | Over 90 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	484	844
Consumer Segment [Member] | Over 90 Days Past Due [Member] | Home Equity Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	190	528
Consumer Segment [Member] | Over 90 Days Past Due [Member] | Home Equity Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	243	251
Consumer Segment [Member] | Over 90 Days Past Due [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	$ 51	$ 65