Loans (Troubled Debt Restructurings) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013 loan		Jun. 30, 2012 loan
Commercial Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	3		1		5		3
Pre-Modification Recorded Investment	$ 9,504	[1]	$ 197	[1]	$ 9,956	[1]	$ 861	[1]
Post-Modification Recorded Investment	9,504	[1]	197	[1]	9,876	[1]	861	[1]
Commercial Construction and Development [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Pre-Modification Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Post-Modification Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Commercial Other [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	5		2		5		7
Pre-Modification Recorded Investment	1,168	[1]	375	[1]	1,168	[1]	1,625	[1]
Post-Modification Recorded Investment	1,168	[1]	375	[1]	1,168	[1]	1,625	[1]
Residential Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	0		2		0		2
Pre-Modification Recorded Investment	0	[1]	651	[1]	0	[1]	651	[1]
Post-Modification Recorded Investment	0	[1]	651	[1]	0	[1]	651	[1]
Homeowner Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Pre-Modification Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Post-Modification Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Home Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	0		0		1		0
Pre-Modification Recorded Investment	0	[1]	0	[1]	92	[1]	0	[1]
Post-Modification Recorded Investment	0	[1]	0	[1]	92	[1]	0	[1]
Home Equity Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Pre-Modification Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Post-Modification Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Other Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		2
Pre-Modification Recorded Investment	0	[1]	0	[1]	0	[1]	5	[1]
Post-Modification Recorded Investment	0	[1]	0	[1]	0	[1]	5	[1]
Class of Financing Receivable [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	8		5		11		14
Pre-Modification Recorded Investment	10,672	[1]	1,223	[1]	11,216	[1]	3,142	[1]
Post-Modification Recorded Investment	$ 10,672	[1]	$ 1,223	[1]	$ 11,136	[1]	$ 3,142	[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, at the time of the restructuring. For accruing troubled debt restructured loans, the recorded investment also includes accrued interest.