Loans (Credit Quality Indicators - Residential, Consumer) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Under 90 Days Past Due [Member] | Accruing Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	$ 970,907	$ 973,771
Under 90 Days Past Due [Member] | Nonaccrual Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	5,385	7,372
Under 90 Days Past Due [Member] | Homeowner Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	24,075	29,118
Under 90 Days Past Due [Member] | Residential Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	1,000,367	1,010,261
Under 90 Days Past Due [Member] | Home Equity Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	258,307	255,047
Under 90 Days Past Due [Member] | Home Equity Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	45,036	46,427
Under 90 Days Past Due [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	39,821	42,811
Under 90 Days Past Due [Member] | Consumer Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	343,164	344,285
Over 90 Days Past Due [Member] | Accruing Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	0	0
Over 90 Days Past Due [Member] | Nonaccrual Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	3,982	3,294
Over 90 Days Past Due [Member] | Homeowner Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	0	0
Over 90 Days Past Due [Member] | Residential Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	3,982	3,294
Over 90 Days Past Due [Member] | Home Equity Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	206	518
Over 90 Days Past Due [Member] | Home Equity Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	463	222
Over 90 Days Past Due [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	0	0
Over 90 Days Past Due [Member] | Consumer Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	$ 669	$ 740