Loans (Past Due Loans) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans 30 to 59 Days Past Due	$ 6,033		$ 5,638
Loans 60 to 89 Days Past Due	2,368		1,753
Loans Over 90 Days Past Due	9,677		14,512
Total Loans Past Due	18,078		21,903
Current Loans	2,841,198		2,440,981
Total loans	2,859,276	[1]	2,462,884	[1]
Commercial Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans 30 to 59 Days Past Due	0		0
Loans 60 to 89 Days Past Due	0		0
Loans Over 90 Days Past Due	5,315		7,492
Total Loans Past Due	5,315		7,492
Current Loans	838,663		788,757
Total loans	843,978		796,249
Commercial Construction and Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans 30 to 59 Days Past Due	0		0
Loans 60 to 89 Days Past Due	0		0
Loans Over 90 Days Past Due	0		0
Total Loans Past Due	0		0
Current Loans	79,592		36,289
Total loans	79,592		36,289
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans 30 to 59 Days Past Due	2,136		276
Loans 60 to 89 Days Past Due	1,202		302
Loans Over 90 Days Past Due	181		731
Total Loans Past Due	3,519		1,309
Current Loans	608,399		529,488
Total loans	611,918		530,797
Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans 30 to 59 Days Past Due	2,943		4,040
Loans 60 to 89 Days Past Due	821		1,285
Loans Over 90 Days Past Due	3,284		5,633
Total Loans Past Due	7,048		10,958
Current Loans	941,683		738,205
Total loans	948,731		749,163
Homeowner Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans 30 to 59 Days Past Due	0		0
Loans 60 to 89 Days Past Due	0		0
Loans Over 90 Days Past Due	0		0
Total Loans Past Due	0		0
Current Loans	36,684		23,511
Total loans	36,684		23,511
Home Equity Lines [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans 30 to 59 Days Past Due	570		831
Loans 60 to 89 Days Past Due	100		100
Loans Over 90 Days Past Due	841		269
Total Loans Past Due	1,511		1,200
Current Loans	240,969		230,162
Total loans	242,480		231,362
Home Equity Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans 30 to 59 Days Past Due	349		448
Loans 60 to 89 Days Past Due	240		66
Loans Over 90 Days Past Due	56		349
Total Loans Past Due	645		863
Current Loans	46,322		39,349
Total loans	46,967		40,212
Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans 30 to 59 Days Past Due	35		43
Loans 60 to 89 Days Past Due	5		0
Loans Over 90 Days Past Due	0		38
Total Loans Past Due	40		81
Current Loans	48,886		55,220
Total loans	$ 48,926		$ 55,301

[1] Includes net unamortized loan origination costs of $2.1 million and $879 thousand, respectively, and net unamortized premiums on purchased loans of $94 thousand and $99 thousand, respectively, at December 31, 2014 and 2013