Loans (Troubled Debt Restructurings Subsequent Default) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013 loan		Sep. 30, 2012 loan		Sep. 30, 2013 loan		Sep. 30, 2012 loan
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	3		2		14		16
Commercial Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	1		2		6		5
Commercial Construction and Development [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Commercial Other [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	2		0		7		7
Residential Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		2
Homeowner Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Home Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	0		0		1		0
Home Equity Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Other Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		2
Payment Default [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	1		6		1		7
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 482	[1]	$ 1,111	[1]	$ 482	[1]	$ 1,306	[1]
Payment Default [Member] | Commercial Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	1		0		1		1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	482	[1]	0	[1]	482	[1]	195	[1]
Payment Default [Member] | Commercial Construction and Development [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Payment Default [Member] | Commercial Other [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	0		3		0		3
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	[1]	428	[1]	0	[1]	428	[1]
Payment Default [Member] | Residential Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	0		2		0		2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	[1]	670	[1]	0	[1]	670	[1]
Payment Default [Member] | Homeowner Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Payment Default [Member] | Home Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Payment Default [Member] | Home Equity Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Payment Default [Member] | Other Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	0		1		0		1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	[1]	$ 13	[1]	$ 0	[1]	$ 13	[1]

[1] The recorded investment in troubled debt restructurings consists of unpaid principal balance, net of charge-offs and unamortized deferred loan origination fees and costs. For accruing troubled debt restructured loans, the recorded investment also includes accrued interest.