Loans (Past Due Loans) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans 30 to 59 Days Past Due	$ 5,388		$ 5,638
Loans 60 to 89 Days Past Due	2,671		1,753
Loans Over 90 Days Past Due	11,876		14,512
Total Loans Past Due	19,935		21,903
Current Loans	2,654,112		2,440,981
Total loans	2,674,047	[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	5,995		7,492
Total Loans Past Due	5,995		7,492
Current Loans	760,708		788,757
Total loans	766,703		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	58,750		36,289
Total loans	58,750		36,289
Commercial Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans 30 to 59 Days Past Due	1,129		276
Loans 60 to 89 Days Past Due	314		302
Loans Over 90 Days Past Due	970		731
Total Loans Past Due	2,413		1,309
Current Loans	562,507		529,488
Total loans	564,920		530,797
Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans 30 to 59 Days Past Due	2,582		4,040
Loans 60 to 89 Days Past Due	2,001		1,285
Loans Over 90 Days Past Due	3,922		5,633
Total Loans Past Due	8,505		10,958
Current Loans	904,451		738,205
Total loans	912,956		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	32,624		23,511
Total loans	32,624		23,511
Home Equity Lines [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans 30 to 59 Days Past Due	1,441		831
Loans 60 to 89 Days Past Due	346		100
Loans Over 90 Days Past Due	852		269
Total Loans Past Due	2,639		1,200
Current Loans	237,928		230,162
Total loans	240,567		231,362
Home Equity Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans 30 to 59 Days Past Due	188		448
Loans 60 to 89 Days Past Due	8		66
Loans Over 90 Days Past Due	136		348
Total Loans Past Due	332		862
Current Loans	46,123		39,350
Total loans	46,455		40,212
Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans 30 to 59 Days Past Due	48		43
Loans 60 to 89 Days Past Due	2		0
Loans Over 90 Days Past Due	1		39
Total Loans Past Due	51		82
Current Loans	51,021		55,219
Total loans	$ 51,072		$ 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 $97 thousand and $99 thousand, respectively, at September 30, 2014 and December 31, 2013.